Method, apparatus, and storage medium for solution analysis of nuclear power plant accidents

Abstract

The application relates to a nuclear power plant accident solution analysis method, device, equipment and storage medium, comprising the following steps: determining the total reaction surface area of silver particles in a solution in a current period based on a first parameter of the silver particles, a second parameter of silver iodide and a solution volume in the current period; determining the generation amount of silver iodide in the solution in the current period according to the total reaction surface area of the silver particles in the solution, inherent properties, a first chemical reaction rate constant of the solution and the solution volume; determining the decomposition amount of the silver iodide in the solution in the current period according to the dose rate of a pool in a containment and a second chemical reaction rate constant of the solution; and determining the residual amount of the silver iodide based on the generation amount and the decomposition amount of the silver iodide in the solution in the current period. Compared with the result obtained by manual estimation, the application is more efficient and more accurate.

Description

Technical Field

[0001] This application relates to the field of nuclear energy technology, and in particular to a solution analysis method, apparatus, equipment, and storage medium for nuclear power plant accidents. Background Technology

[0002] After a pressurized water reactor (PWR) accident, most of the iodine aerosols entering the containment vessel are soluble metal iodides. After dissolving, they mostly exist as iodide ions in the solution within the containment vessel's water pool. Iodine and its related compounds in the solution undergo several chemical reactions with the irradiation decomposition products of water. Some of the less volatile iodide ions are oxidized into more volatile iodine molecules, which may then be released into the containment atmosphere, potentially affecting public health. Silver is typically used as a neutron absorber in the control rods of a PWR. When the control rods are heated, the silver vapor enters the containment vessel and is subsequently released into the solution. The silver in the solution combines with iodine to form insoluble silver iodide. This process consumes iodine molecules and iodide ions, effectively capturing iodine and reducing its release into the atmosphere.

[0003] There are two mechanisms for the reaction of iodine with silver to form silver iodide: one is the reaction of silver particles with iodine molecules to form silver iodide; the other is that silver particles dissolve into silver oxide after being exposed to oxygen in water, and the dissolved silver oxide reacts with iodine particles to form silver iodide. After a serious accident in a nuclear power plant's pressurized water reactor, analysis of the solutions within the containment vessel can help assess the severity of the accident. Currently, there is no specific method for analyzing solutions within the containment pool (e.g., analyzing the amount of silver iodide formed). The amount of silver iodide formed is only roughly estimated manually based on the presence of silver particles and elemental iodine in the solution, and the results obtained from this method are not accurate. Summary of the Invention

[0004] Therefore, it is necessary to provide a solution analysis method, apparatus, equipment, and storage medium for nuclear power plant accidents that can accurately determine the amount of silver iodide generated, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides a solution analysis method for nuclear power plant accidents. The method includes:

[0006] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0007] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0008] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0009] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0010] In one embodiment, the total reaction surface area of ​​the silver particles in the solution is determined based on a first parameter of the silver particles in the solution during the current time period, a second parameter of the silver iodide, and the solution volume, including:

[0011] The theoretical mass of silver iodide is determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (which are inherent properties of silver particles), and the density of silver iodide.

[0012] The reaction surface area of ​​suspended silver particles is determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles.

[0013] The parameters for analyzing the sedimentation of silver are determined based on the coverage of silver particles at the bottom of the solution.

[0014] The reaction surface area of ​​the silver particles in the sedimentation silver was determined based on the analysis parameters of the sedimentation silver.

[0015] The total reaction surface area of ​​silver particles in the solution is determined based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0016] In one embodiment, the parameters for analyzing precipitated silver are determined based on the coverage of silver particles at the bottom of the solution, including:

[0017] If the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the pool containing the solution is used as the parameter for analyzing the sedimentation of silver.

[0018] In one embodiment, the parameters for analyzing precipitated silver are determined based on the coverage of silver particles at the bottom of the solution, including:

[0019] If the coverage of silver particles on the bottom of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles will be used as the parameters for analyzing the precipitation of silver.

[0020] In one embodiment, the first chemical reaction rate constant of the solution includes: the reaction rate constant of silver with iodine and the reaction rate constant of silver oxide with iodide ions;

[0021] Based on the total reaction surface area of ​​silver particles in the solution, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide formed in the solution during the current time period, including:

[0022] The first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0023] The rate of formation of the second silver iodide is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution.

[0024] The amount of silver iodide generated in the solution during the current time period is determined based on the first and second silver iodide generation rates.

[0025] In one embodiment, the first chemical reaction rate constant of the solution further includes: the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution;

[0026] The rate of formation of the second silver iodide is determined based on the specific surface area and molar mass of silver particles in the solution, as well as the reaction rate constant between silver oxide and iodide ions, including:

[0027] The amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution.

[0028] Based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution, determine the amount of silver oxide dissolved in the solution in the current time period.

[0029] The second silver iodide formation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution, which are inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

[0030] In one embodiment, the second chemical reaction rate constant includes: the rate constant for the decomposition reaction of silver iodide and the rate constant for the reverse reaction after the decomposition of silver iodide;

[0031] Based on the dose rate of the water pool inside the containment vessel and the second chemical reaction rate constant of the solution, determine the amount of silver iodide decomposed in the solution during the current time period, including:

[0032] The amount of silver iodide decomposed in the solution during the current time period is determined based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0033] The amount of silver iodide produced during the reverse reaction is determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide.

[0034] Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0035] In one embodiment, the method further includes:

[0036] Based on the sedimentation rate of silver particles and the depth of the solution, determine the time it takes for silver particles to descend from the solution surface to the bottom of the solution.

[0037] Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths;

[0038] Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer are determined.

[0039] In one embodiment, the method further includes:

[0040] The settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0041] Secondly, this application also provides a solution analysis apparatus for nuclear power plant accidents. The apparatus includes:

[0042] The first determining module is used to determine the total reaction surface area of ​​silver particles in the solution based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume; wherein, the first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide formed; the solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident;

[0043] The second determining module is used to determine the amount of silver iodide generated in the solution during the current time period based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0044] The third determining module is used to determine the amount of silver iodide decomposed in the solution during the current time period based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0045] The fourth determination module is used to determine the remaining amount of silver iodide in the current time period based on the amount of silver iodide generated and decomposed in the solution during the current time period.

[0046] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0047] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0048] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0049] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0050] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0051] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0052] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0053] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0054] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0055] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0056] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0057] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0058] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0059] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0060] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0061] The aforementioned solution analysis method, apparatus, equipment, and storage medium for nuclear power plant accidents first determines the total reaction surface area of ​​silver particles in the solution during the current time period based on a first parameter of silver particles, a second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the containment pool after the nuclear power plant accident. Then, based on the total reaction surface area of ​​silver particles in the solution, inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, the amount of silver iodide formed in the solution during the current time period is determined. Based on the dose rate of the containment pool and the second chemical reaction rate constant of the solution, the amount of silver iodide decomposed in the solution during the current time period is determined. This application considers not only the amount of silver iodide formed but also the amount of silver iodide decomposed. Finally, based on the amount of silver iodide formed and decomposed in the solution during the current time period, the remaining amount of silver iodide is determined. Compared with results obtained through manual estimation, this method is not only more efficient but also more accurate. Attached Figure Description

[0062] Figure 1 This is a diagram illustrating the application environment of the solution analysis method for nuclear power plant accidents provided in this embodiment.

[0063] Figure 2 A schematic flowchart of the first solution analysis method for nuclear power plant accidents provided in this embodiment;

[0064] Figure 3 This is a schematic flowchart illustrating the process for determining the total reaction surface area of ​​silver particles in a solution, as provided in this embodiment.

[0065] Figure 4 This is a flowchart illustrating the process for determining the amount of silver iodide generated in the solution during the current time period, as provided in this embodiment.

[0066] Figure 5 This is a schematic flowchart of the second solution analysis method for nuclear power plant accidents provided in this embodiment;

[0067] Figure 6 This is a partial flowchart of a solution analysis method for a third type of nuclear power plant accident provided in this embodiment;

[0068] Figure 7 This is another part of the flowchart of the solution analysis method for the third type of nuclear power plant accident provided in this embodiment;

[0069] Figure 8 This embodiment provides a structural block diagram of a solution analysis device for a first type of nuclear power plant accident.

[0070] Figure 9 This is an internal structural diagram of the computer device provided in this embodiment. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0072] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 1 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores data for acquiring abnormal data. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements a solution analysis method for nuclear power plant accidents.

[0073] In one embodiment, a solution analysis method for a nuclear power plant accident is provided, such as... Figure 2 As shown, it includes the following steps:

[0074] S201. Based on the first parameter of the silver particles in the solution during the current time period, the second parameter of the silver iodide, and the solution volume, determine the total reaction surface area of ​​the silver particles in the solution. The first parameter includes the inherent properties of the silver particles, the total number of silver particles, and the concentration of the silver particles; the second parameter includes the density of the silver iodide and the existing mass of the silver iodide formed; the solution is the solution in the containment pool inside the reactor vessel after a nuclear power plant accident.

[0075] The current time period refers to the time difference between the previous and next time points in the quality inspection, or it can refer to the current time step. The first parameter refers to the relevant parameters of the silver particles in the solution, such as the inherent properties of the silver particles, the total number of silver particles, and the concentration of silver particles. The inherent properties of silver particles mainly include their specific surface area, molar mass, radius, and reactive thickness. The reactive thickness of silver particles refers to the thickness of the silver particles in the solution where a chemical reaction can occur; only the outer layer of silver particles in the solution can undergo a chemical reaction, and the probability of reaction decreases as one moves further inward. The second parameter refers to the relevant parameters of silver iodide in the solution. In this embodiment, this mainly includes the density of silver iodide and the existing mass of silver iodide formed. The existing mass of silver iodide formed refers to the mass of silver iodide already formed in the solution before the current time period. The total reactive surface area of ​​the silver particles in the solution refers to the total surface area of ​​all silver particles in the solution that can undergo a chemical reaction.

[0076] An optional implementation method of this embodiment is as follows: input the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume into the trained neural network model, and obtain the total reaction surface area of ​​silver particles in the solution based on the output of the trained neural network model.

[0077] Another optional implementation of this embodiment is as follows: the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles can be determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. Then, based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles, the total reaction surface area of ​​silver particles in the solution can be determined.

[0078] S202, based on the total reaction surface area of ​​silver particles in the solution, inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide generated in the solution during the current time period.

[0079] The first reaction rate constant refers to the reaction rate constant of the chemical reaction that produces silver iodide in the solution.

[0080] One optional implementation of this embodiment is as follows: The total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume are input into a trained neural network model. The trained neural network model then outputs the amount of silver iodide generated in the solution during the current time period. The amount generated refers to the total amount of silver iodide generated in the solution through chemical reaction during the current time period.

[0081] Another optional implementation of this embodiment is as follows: Based on the total reaction surface area of ​​silver particles in the solution, inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide generated by the reaction of silver particles and iodine in the solution during the current time period, as well as the amount of silver iodide generated by the reaction of silver oxide and iodine. Based on the amount of silver iodide generated by the reaction of silver particles and iodine in the solution during the previous time period, as well as the amount of silver iodide generated by the reaction of silver oxide and iodine, determine the amount of silver iodide generated in the solution during the current time period.

[0082] S203, based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution, determine the amount of silver iodide decomposed in the solution during the current time period.

[0083] The second chemical reaction rate constant refers to the reaction rate constant of the chemical reaction in the solution used to determine the amount of silver iodide decomposition in the solution during the current time period. It mainly includes the silver iodide decomposition reaction rate constant and the reverse reaction rate constant after the decomposition of silver iodide.

[0084] An optional implementation method of this embodiment is as follows: the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution are input into a trained neural network model, and the trained neural network model outputs the amount of silver iodide decomposed in the solution during the current time period.

[0085] Another optional implementation of this embodiment is as follows: Based on the amount of silver iodide dissolved in the solution during the current time period, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool, determine the amount of silver iodide decomposed in the solution during the current time period; based on the content of silver particles and iodine in the solution after decomposition, and the rate constant of the reverse reaction after the decomposition of silver iodide, determine the amount of silver iodide generated during the reverse reaction; and update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0086] In this embodiment, the chemical reaction formula for the decomposition of silver iodide is:

[0087]

[0088] Where γ represents radiation conditions, k5 represents the rate constant of the decomposition reaction of silver iodide, k6 represents the rate constant of the reverse reaction after the decomposition of silver iodide, AgI represents silver iodide, I2 represents elemental iodine, and Ag represents the element silver.

[0089] Based on this, the following formula (1) can be used to characterize the decomposition rate of silver iodide in the solution during the current time period:

[0090]

[0091] In formula (1), D sump K represents the dose rate of the water tank, k5 represents the rate constant of the silver iodide decomposition reaction, and k6 represents the rate constant of the reverse reaction after the decomposition of silver iodide.

[0092] Using formula (1), the amount of silver iodide dissolved in the solution during the current time period can be determined based on the amount of silver iodide dissolved, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool. Using formula (1), the amount of silver iodide generated during the reverse reaction can be determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide. Based on the amount of silver iodide generated during the reverse reaction, the amount of silver iodide decomposed in the solution during the current time period can be updated.

[0093] S204. Based on the amount of silver iodide generated and decomposed in the solution during the current time period, determine the remaining amount of silver iodide during the current time period.

[0094] The remaining amount refers to the mass of silver iodide remaining in the solution during the current time period, determined based on the amount of silver iodide generated and decomposed in the solution during the current time period.

[0095] Optionally, in this embodiment, the remaining amount of silver iodide in the current time period can be determined by calculating the difference between the amount of silver iodide generated and the amount of silver iodide decomposed in the solution during the current time period.

[0096] This embodiment first determines the total reaction surface area of ​​silver particles in the solution during the current time period based on the first parameter of silver particles in the solution, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the containment pool of a nuclear power plant after an accident. Then, based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, the amount of silver iodide formed in the solution during the current time period is determined. Based on the dose rate of the containment pool and the second chemical reaction rate constant of the solution, the amount of silver iodide decomposed in the solution during the current time period is determined. This application considers not only the amount of silver iodide formed but also the amount of silver iodide decomposed. Finally, based on the amount of silver iodide formed and decomposed in the solution during the current time period, the remaining amount of silver iodide is determined. Compared with the result obtained by manual estimation, this method is not only more efficient but also more accurate.

[0097] In one embodiment, to more accurately determine the total reaction surface area of ​​silver particles in the solution, such as Figure 3 As shown, in S201, one optional implementation includes:

[0098] S301. Based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (inherent properties), and the density of silver iodide, determine the theoretical mass of silver iodide produced.

[0099] The theoretical mass of silver iodide refers to the maximum mass of silver iodide formed in the solution after a chemical reaction.

[0100] One optional implementation method of this embodiment is as follows: the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles in their inherent properties, and the density of silver iodide are input into a trained neural network model, and the neural network model outputs the theoretical mass of silver iodide generated.

[0101] Another optional implementation of this embodiment is as follows: Based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles in their inherent properties, and the density of silver iodide, the theoretical mass of silver iodide can be determined by combining the following formula (2).

[0102] m max = 3 / 4π(R) 3 -(RL) 3 )ρ AgI N (2)

[0103] Where N represents the total number of silver particles, R represents the radius of the silver particles, L represents the reactive thickness of the silver particles, and ρ AgI The density of silver iodide is expressed in m. max This indicates the theoretical mass of silver iodide produced.

[0104] S302. Based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles, determine the reaction surface area of ​​suspended silver particles.

[0105] Suspended silver particles refer to silver particles in the solution that have not settled to the bottom of the solution and are in a suspended state.

[0106] An optional implementation method of this embodiment is as follows: the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles are input into a trained neural network model, and the neural network model outputs the reaction surface area of ​​the suspended silver particles.

[0107] Another optional implementation method of this embodiment is: based on the theoretical mass of silver iodide, the existing mass of silver iodide, the volume of the solution, and the specific surface area and molar mass of the silver particles, the reaction surface area of ​​the suspended silver particles can be determined by combining the following formula (3).

[0108]

[0109] In formula (3), [Ag] sus [m] indicates the concentration of suspended silver particles; AgI Indicates the existing mass of silver iodide; S Ag MAG represents the specific surface area of ​​silver particles; MAG represents the molar mass of silver; V represents the volume of the solution; m max Indicates the theoretical mass of silver iodide produced; A Ag，sus This represents the reaction surface area of ​​the suspended silver particles.

[0110] In this embodiment, one optional method for obtaining the concentration of suspended silver particles is to directly measure the concentration of suspended silver particles in the solution using a sensor. Multiple sensors can be set, and these sensors can be equally spaced from top to bottom to obtain the concentration of suspended silver particles at different depths in the solution. Finally, the average concentration of suspended silver particles at different depths in the solution can be taken as the concentration of suspended silver particles in the solution.

[0111] Another optional method for obtaining the concentration of suspended silver particles in this embodiment is as follows: The number of layers can be determined in advance based on the descent time of the silver particles from the surface of the solution to the bottom and the time step corresponding to the current time period. The solution is then vertically divided into multiple solution layers of different depths according to the number of layers. After obtaining the concentration of suspended silver particles in each solution layer at the beginning of the previous time step, and combining this with the concentration changes of suspended silver particles in each solution layer during the previous time step, the concentration of suspended silver particles in each solution layer at the beginning of the current time step can be determined. The method for determining the concentration changes of suspended silver particles in each solution layer is described in detail in the following embodiments.

[0112] S303, based on the coverage of silver particles at the bottom of the solution, determines the analytical parameters for sedimented silver.

[0113] Coverage refers to the degree to which silver particles cover the bottom surface of the solution, mainly divided into full coverage and partial coverage. Precipitation silver analysis parameters are parameters used to determine the reaction surface area of ​​the precipitated silver particles based on the coverage of silver particles at the bottom of the solution. Precipitated silver particles are silver particles that have settled to the bottom of the solution. Coverage can be measured using a detector (e.g., a visual probe or sensor). Alternatively, after the solution is layered, it can be determined based on the change in silver particle concentration in the solution layer above the precipitated silver. At the end of the previous time step, the silver particles in that solution layer will settle to the bottom of the solution, becoming precipitated silver. The amount of silver particles that have become precipitated silver can be determined based on the change in silver particle concentration in that solution layer during the previous time step. Combined with the remaining amount of previously precipitated silver and the bottom area of ​​the solution, the concentration and coverage of the precipitated silver particles can be determined.

[0114] An optional implementation method of this embodiment is as follows: if the coverage rate of silver particles on the bottom surface of the solution is greater than the coverage rate threshold, then the bottom area of ​​the water tank containing the solution is used as the analysis parameter for sedimented silver.

[0115] Another optional implementation of this embodiment is as follows: if the coverage of silver particles on the bottom surface of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles are used as the parameters for analyzing the precipitation of silver.

[0116] S304. Based on the analysis parameters of the deposited silver, determine the reaction surface area of ​​the silver particles in the deposited silver.

[0117] When the bottom area of ​​the water tank containing the solution is the analytical parameter for precipitated silver, one possible implementation method in this embodiment is to use the bottom area of ​​the water tank containing the solution as the reaction surface area of ​​the precipitated silver particles.

[0118] When the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles are used as analytical parameters for precipitated silver, another optional implementation method in this embodiment is: based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles, the reaction surface area of ​​the precipitated silver particles can be determined by combining the following formula (4).

[0119]

[0120] Among them, [Ag dep [] indicates the concentration of silver particles in the sediment; F indicates the proportion of the total reaction area of ​​the sedimented silver; S bo S represents the bottom area of ​​the pool; AgMAG represents the specific surface area of ​​silver particles; MAG represents the molar mass of silver; V represents the volume of the solution; m max Indicates the theoretical mass of silver iodide produced; A Ag，dep This represents the reaction surface area of ​​the settled silver particles.

[0121] S305, determine the total reaction surface area of ​​silver particles in the solution based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0122] Optionally, in this embodiment, the total reaction surface area of ​​silver particles in the solution can be determined by combining the reaction surface areas of suspended silver particles and settled silver particles. The combination can be achieved through summation or weighted summation, among other methods.

[0123] In this embodiment, the theoretical mass of silver iodide can be determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of silver particles (inherent properties), and the density of silver iodide. The reaction surface area of ​​suspended silver particles can be determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles (inherent properties). The analysis parameters for precipitated silver can be determined based on the coverage of silver particles on the bottom of the solution. The reaction surface area of ​​precipitated silver particles can be determined based on the analysis parameters for precipitated silver. Based on the reaction surface areas of suspended and precipitated silver particles, the total reaction surface area of ​​silver particles in the solution can be accurately determined.

[0124] In one embodiment, the first chemical reaction rate constant includes the reaction rate constant of silver with iodine, the reaction rate constant of silver oxide with iodide ions, the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution, etc. Based on this, in order to accurately determine the amount of silver iodide generated in the solution during the current time period, such as... Figure 4 As shown, one optional implementation of S202 is as follows:

[0125] S401, the first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0126] The first silver iodide formation rate refers to the rate at which silver particles in the solution react with elemental iodine to form silver iodide.

[0127] An optional implementation method of this embodiment is as follows: the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant of silver and iodine are input into a trained neural network model, and the neural network model outputs the first silver iodide formation rate.

[0128] Another optional implementation of this embodiment is as follows: based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant of silver and iodine, the first silver iodide formation rate can be determined by combining the following formula (5).

[0129]

[0130] Where k1 represents the reaction rate constant between silver and iodine; A tot The total surface area of ​​the silver particles is represented by V; the volume of the solution is represented by [I₂(aq)]; and the content of iodine in the solution is represented by [I₂(aq)]. This indicates the first silver iodide formation rate.

[0131] S402, based on the specific surface area and molar mass of silver particles in the solution, as well as the reaction rate constant between silver oxide and iodide ions, the rate of formation of the second silver iodide is determined.

[0132] The second silver iodide formation rate refers to the rate at which the silver oxide generated after the silver particles in the solution react with oxygen molecules reacts with iodine to form silver iodide.

[0133] An optional implementation method of this embodiment is as follows: the specific surface area, molar mass, and reaction rate constant of silver oxide and iodide ions in the solution are input into a trained neural network model, and the neural network model outputs the second silver iodide formation rate.

[0134] Another optional implementation of this embodiment is as follows: the amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant of silver with oxygen, and the oxygen content in the solution; the amount of silver oxide dissolved in the solution in the current time period is determined based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution; and the second silver iodide generation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution in the current time period.

[0135] In this embodiment, the amount of silver oxide generated in the previous period can be determined by the following formula (6).

[0136]

[0137] In formula (6), k2 represents the reaction rate constant between silver and oxygen; [O2(aq)] represents the oxygen content in the solution; A tot V represents the total reactive surface area of ​​the silver particles; V represents the solution volume. This indicates the rate of silver oxide formation.

[0138] In this embodiment, the amount of silver oxide dissolved in the solution during the current time period can be determined by the following formula (7).

[0139]

[0140] In formula (7), [Ag2O] represents the amount of silver oxide generated in the current time period; k3 represents the reaction rate constant for the dissolution of silver oxide; This indicates the dissolution rate of silver oxide in the solution during the current time period.

[0141] In this embodiment, the second silver iodide generation rate can be determined by the following formula (8).

[0142]

[0143] In formula (8), k4 represents the reaction rate constant between silver oxide and iodide ions; S Ag The specific surface area of ​​silver particles is represented by MAG; the molar mass of silver is represented by [Ag₂O(aq)]; and the amount of silver oxide dissolved in the solution during the previous time period is represented by [Ag₂O(aq)]. This indicates the rate of formation of the second silver iodide.

[0144] S403, based on the first silver iodide formation rate and the second silver iodide formation rate, determine the amount of silver iodide formed in the solution during the current time period.

[0145] Optionally, in this embodiment, the amount of silver iodide generated in the solution during the current time period can be determined based on the first silver iodide generation rate, the second silver iodide generation rate, and the time step of the current time period.

[0146] In this embodiment, the first silver iodide formation rate can be determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine. The second silver iodide formation rate can be determined based on the specific surface area, molar mass, and reaction rate constant between silver oxide and iodide ions of the inherent properties of silver particles in the solution. Based on the first and second silver iodide formation rates, the amount of silver iodide formed in the solution during the current time period can be accurately determined.

[0147] Based on the above embodiments, such as Figure 5 As shown, another optional implementation of the solution analysis method for nuclear power plant accidents includes:

[0148] S501. Determine the total reaction surface area of ​​silver particles in the solution based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide formed; the solution is the solution in the containment pool of the reactor after a nuclear power plant accident.

[0149] S502. Based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide generated in the solution during the current time period.

[0150] S503. Determine the amount of silver iodide decomposed in the solution during the current time period based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0151] S504. Determine the remaining amount of silver iodide in the current time period based on the amount of silver iodide generated and decomposed in the solution during the current time period.

[0152] S505 determines the time it takes for silver particles to descend from the solution surface to the bottom of the solution based on the sedimentation rate of the silver particles and the depth of the solution.

[0153] Here, the settling rate of silver particles refers to the speed at which silver particles sink in the solution. The settling time refers to the time it takes for silver particles to settle from the surface of the solution to the bottom.

[0154] Optionally, in this embodiment, the time it takes for silver particles to descend from the solution surface to the bottom of the solution can be obtained by dividing the depth of the solution by the sedimentation rate of the silver particles.

[0155] An optional implementation method for determining the settling rate of silver particles in this embodiment is as follows: the settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium. Here, the density of the liquid medium refers to the density of the main components of the solution; in this embodiment, it refers to the density of water in the containment pool of the reactor. Specifically, the settling rate of silver particles can be determined using the following formula (9) based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0156]

[0157] In formula (9), d Ag η represents the diameter of the silver particles; η represents the dynamic viscosity coefficient of the solution; ρ Ag ρ represents the density of silver. w V represents the density of a liquid medium. set This indicates the sedimentation rate of silver particles.

[0158] S506, based on the descent duration and the time step corresponding to the current period, divides the solution into multiple solution layers of different depths.

[0159] The time step refers to the difference between two consecutive time points. In this embodiment, the time step is the same as the duration of the current time period.

[0160] Optionally, in this embodiment, the number of layers can be determined based on the descent duration and the time step corresponding to the current period, and the solution can be vertically divided into multiple solution layers of different depths according to the number of layers. For example, the solution can be vertically divided into N solution layers based on the descent duration and the time step corresponding to the current period (this can also be understood as the silver particles on the solution surface settling to the bottom of the solution after N time steps), and denoted as Ag from top to bottom. sus，0 Ag sus，1 ...Ag sus，n-1 Ag sus，n Ag sus，n+1 ... Ag sus，N-1 Ag dep Among them, Ag sus，0 Silver on the surface of the solution; Ag dep For precipitated silver; n can represent either the nth solution layer or the depth of that solution layer in the solution. Ag sus，N-1 At the end of the time step corresponding to the current period, it settles to the bottom of the solution and becomes precipitated silver.

[0161] S507, based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, determine the concentration changes of the settled silver particles and the suspended silver particles in each solution layer.

[0162] Optionally, in this embodiment, based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the depth value corresponding to each solution layer, the following formulas (10) and (11) can be used to determine the concentration changes of the settled silver particles and the suspended silver particles in each solution layer.

[0163]

[0164]

[0165] In formula (10) This indicates the rate of change in the concentration of suspended silver particles; This represents the change in the reactive surface area of ​​suspended silver particles. This indicates the rate of change in the concentration of settled silver particles; This represents the change in the surface area of ​​the reaction zone of the settled silver particles.

[0166]

[0167] in, This represents the change in the concentration of silver particles in the nth solution layer over time; [Ag] sus，n [Ag] represents the concentration of suspended silver particles in the nth solution layer; sus] indicates the concentration of suspended silver particles in the solution; n indicates which solution layer, and also the depth of the solution layer.

[0168] It should be noted that in this embodiment, the mass change of silver particles in each solution layer can be determined based on the changes in the concentration of silver particles in each solution layer.

[0169] In this embodiment, the descent time of silver particles from the solution surface to the bottom is determined based on the sedimentation rate of the silver particles and the depth of the solution. Based on the descent time and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths. Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the depth value corresponding to each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer can also be determined.

[0170] It should be noted that, in this embodiment, the concentration of silver particles in each solution layer at the beginning of the next time step can be determined based on the changes in the concentration of silver particles in each solution layer at the current time step. Based on the concentration of silver particles in each solution layer at the beginning of the next time step, the concentration of precipitated silver particles and the concentration of suspended silver particles in the solution at the beginning of the next time step can be determined, which facilitates the determination of the reaction surface area of ​​precipitated silver particles and suspended silver particles in the solution at the next time step.

[0171] In one embodiment, such as Figure 6 , Figure 7 As shown, an optional implementation of a solution analysis method for nuclear power plant accidents includes:

[0172] S601. Determine the theoretical mass of silver iodide based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles in their inherent properties, and the density of silver iodide.

[0173] S602. Determine the reaction surface area of ​​suspended silver particles based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles, which are inherent properties.

[0174] S603. Determine whether the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold. If yes, proceed to S604; otherwise, proceed to S605.

[0175] S604. Use the bottom area of ​​the container containing the solution as the parameter for silver precipitation analysis. Then execute S606.

[0176] S605. Determine the reaction surface area of ​​the silver particles in the sedimentation based on the analysis parameters of the sedimented silver.

[0177] S606. The theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles are used as parameters for the analysis of precipitated silver.

[0178] S607. Determine the reaction surface area of ​​the silver particles in the sedimented silver based on the analysis parameters of the sedimented silver.

[0179] S608. Determine the total reaction surface area of ​​silver particles in the solution based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0180] S609. Determine the first silver iodide formation rate based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0181] S6010. Determine the amount of silver oxide generated in the current time period based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution.

[0182] S6011. Based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution, determine the amount of silver oxide dissolved in the solution in the current time period.

[0183] S6012. Determine the second silver iodide formation rate based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

[0184] S6013. Determine the amount of silver iodide generated in the solution during the current time period based on the first silver iodide generation rate and the second silver iodide generation rate.

[0185] S6014. Determine the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0186] S6015. Based on the content of silver particles and iodine in the solution after decomposition, and the rate constant of the reverse reaction after the decomposition of silver iodide, determine the amount of silver iodide generated during the reverse reaction.

[0187] S6016. Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0188] S6017. Determine the remaining amount of silver iodide in the current time period based on the amount of silver iodide generated and decomposed in the solution during the current time period.

[0189] S6018. Determine the settling rate of silver particles based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0190] S6019. Based on the sedimentation rate of silver particles and the depth of the solution, determine the time it takes for silver particles to descend from the surface of the solution to the bottom of the solution.

[0191] S6020. Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths.

[0192] S6021. Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, determine the concentration changes of the settled silver particles and the suspended silver particles in each solution layer.

[0193] This embodiment first determines the total reaction surface area of ​​silver particles in the solution during the current time period based on the first parameter of silver particles in the solution, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the containment pool of a nuclear power plant after an accident. Then, based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, the amount of silver iodide formed in the solution during the current time period is determined. Based on the dose rate of the containment pool and the second chemical reaction rate constant of the solution, the amount of silver iodide decomposed in the solution during the current time period is determined. This application considers not only the amount of silver iodide formed but also the amount of silver iodide decomposed. Finally, based on the amount of silver iodide formed and decomposed in the solution during the current time period, the remaining amount of silver iodide is determined. Compared with the result obtained by manual estimation, this method is not only more efficient but also more accurate.

[0194] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0195] Based on the same inventive concept, this application also provides a solution analysis apparatus for nuclear power plant accidents to implement the solution analysis method for nuclear power plant accidents described above. The solution provided by this apparatus is similar to the solution described in the above method; therefore, the specific limitations of one or more embodiments of the solution analysis apparatus for nuclear power plant accidents provided below can be found in the limitations of the solution analysis method for nuclear power plant accidents described above, and will not be repeated here.

[0196] In one embodiment, such as Figure 8 As shown, a solution analysis device 1 for nuclear power plant accidents is provided, comprising: a first determining module 10, a second determining module 20, a third determining module 30, and a fourth determining module 40, wherein:

[0197] The first determining module 10 is used to determine the total reaction surface area of ​​silver particles in the solution based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume; wherein, the first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide generated; the solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident;

[0198] The second determining module 20 is used to determine the amount of silver iodide generated in the solution during the current time period based on the total reaction surface area of ​​silver particles in the solution, inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0199] The third determining module 30 is used to determine the amount of silver iodide decomposed in the solution during the current time period based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0200] The fourth determining module 40 is used to determine the remaining amount of silver iodide in the current time period based on the amount of silver iodide generated and the amount of silver iodide decomposed in the solution during the current time period.

[0201] In one embodiment, the upper Figure 8 The first determining module 10 further includes:

[0202] The first determining unit is used to determine the theoretical mass of silver iodide produced based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles in their inherent properties, and the density of silver iodide.

[0203] The second determining unit is used to determine the reaction surface area of ​​suspended silver particles based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles.

[0204] The third determining unit is used to determine the analytical parameters for precipitated silver based on the coverage of silver particles on the bottom surface of the solution.

[0205] The fourth determining unit is used to determine the reaction surface area of ​​the silver particles in the sedimented silver based on the analysis parameters of the sedimented silver.

[0206] The fifth determining unit is used to determine the total reaction surface area of ​​silver particles in the solution based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0207] In one embodiment, the third determining unit is further specifically used to: if the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the container containing the solution is used as the sedimentation silver analysis parameter.

[0208] In one embodiment, the third determining unit is further specifically used to: if the coverage of silver particles on the bottom surface of the solution is less than or equal to the coverage threshold, then the theoretical generated mass of silver iodide, the existing generated mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles in their inherent properties are used as parameters for the analysis of precipitated silver.

[0209] In one embodiment, the upper Figure 8 The first chemical reaction rate constants of the second determining module include: the reaction rate constant of silver with iodine, and the reaction rate constant of silver oxide with iodide ions. Based on this, the above... Figure 7 The second determining module 20 further includes:

[0210] The sixth determining unit is used to determine the first silver iodide formation rate based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0211] The seventh determining unit is used to determine the second silver iodide formation rate based on the specific surface area, molar mass, and reaction rate constant of silver oxide and iodide ions in the inherent properties of silver particles in the solution.

[0212] The eighth determining unit is used to determine the amount of silver iodide generated in the solution during the current time period based on the first silver iodide generation rate and the second silver iodide generation rate.

[0213] In one embodiment, the upper Figure 8The first chemical reaction rate constant of the second determining module also includes: the reaction rate constant of silver with oxygen and the reaction rate constant of silver oxide dissolution. Based on this, the eighth determining unit is also specifically used to: determine the amount of silver oxide generated in the current time period based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant of silver with oxygen, and the oxygen content in the solution; determine the amount of silver oxide dissolved in the solution in the current time period based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution; and determine the second silver iodide generation rate based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution in the current time period.

[0214] In one embodiment, such as Figure 8 As shown, the second chemical reaction rate constant in the third determining module 30 includes: the rate constant of the silver iodide decomposition reaction and the rate constant of the reverse reaction after the decomposition of silver iodide. Based on this, the above... Figure 8 The third determining module 30 further includes:

[0215] The ninth determining unit is used to determine the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide dissolved in the solution during the current time period, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0216] The tenth determining unit is used to determine the amount of silver iodide generated during the reverse reaction based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide.

[0217] The update unit is used to update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0218] In one embodiment, a solution analysis apparatus for a nuclear power plant accident further includes:

[0219] The fifth determining module is used to determine the time it takes for silver particles to descend from the surface of the solution to the bottom of the solution, based on the sedimentation rate of the silver particles and the depth of the solution.

[0220] The partitioning module is used to divide the solution into multiple solution layers of different depths based on the descent duration and the time step corresponding to the current period.

[0221] The sixth determination module is used to determine the concentration change of silver particles in each solution layer based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth value of each solution layer.

[0222] In one embodiment, a solution analysis apparatus for a nuclear power plant accident further includes:

[0223] The seventh determination module is used to determine the settling rate of silver particles based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0224] The modules in the solution analysis device for the aforementioned nuclear power plant accident can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0225] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 9 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operating system and computer programs stored in the non-volatile storage media. The database stores relevant data about the solutions in the reactor containment pool. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a solution analysis method for nuclear power plant accidents.

[0226] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0227] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0228] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0229] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0230] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0231] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0232] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the total reaction surface area of ​​the silver particles in the solution based on a first parameter of the silver particles in the solution during the current time period, a second parameter of the silver iodide, and the solution volume, including:

[0233] The theoretical mass of silver iodide is determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (which are inherent properties of silver particles), and the density of silver iodide.

[0234] The reaction surface area of ​​suspended silver particles is determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles.

[0235] The parameters for analyzing the sedimentation of silver are determined based on the coverage of silver particles at the bottom of the solution.

[0236] The reaction surface area of ​​the silver particles in the sedimentation silver was determined based on the analysis parameters of the sedimentation silver.

[0237] The total reaction surface area of ​​silver particles in the solution is determined based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0238] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0239] If the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the container containing the solution is used as the parameter for analyzing the sedimentation of silver.

[0240] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0241] If the coverage of silver particles on the bottom of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles will be used as the parameters for analyzing the precipitation of silver.

[0242] In one embodiment, when the processor executes the computer program, it further performs the following steps: the first chemical reaction rate constant of the solution includes: the reaction rate constant of silver with iodine, and the reaction rate constant of silver oxide with iodide ions;

[0243] Based on the total reaction surface area of ​​silver particles in the solution, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide formed in the solution during the current time period, including:

[0244] The first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0245] The rate of formation of the second silver iodide is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution.

[0246] The amount of silver iodide generated in the solution during the current time period is determined based on the first and second silver iodide generation rates.

[0247] In one embodiment, when the processor executes the computer program, it further performs the following steps: the first chemical reaction rate constant of the solution also includes: the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution;

[0248] The rate of formation of the second silver iodide is determined based on the specific surface area and molar mass of silver particles in the solution, as well as the reaction rate constant between silver oxide and iodide ions, including:

[0249] The amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution.

[0250] Based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution, determine the amount of silver oxide dissolved in the solution in the current time period.

[0251] The second silver iodide formation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution, which are inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

[0252] In one embodiment, when the processor executes the computer program, it also performs the following steps: the second chemical reaction rate constant includes: the rate constant for the decomposition reaction of silver iodide and the rate constant for the reverse reaction after the decomposition of silver iodide;

[0253] Based on the dose rate of the water pool inside the containment vessel and the second chemical reaction rate constant of the solution, determine the amount of silver iodide decomposed in the solution during the current time period, including:

[0254] The amount of silver iodide decomposed in the solution during the current time period is determined based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0255] The amount of silver iodide produced during the reverse reaction is determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide.

[0256] Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0257] In one embodiment, the processor, when executing a computer program, further performs the following steps: the method further includes:

[0258] Based on the sedimentation rate of silver particles and the depth of the solution, determine the time it takes for silver particles to descend from the solution surface to the bottom of the solution.

[0259] Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths;

[0260] Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer are determined.

[0261] In one embodiment, the processor, when executing a computer program, further performs the following steps: the method further includes:

[0262] The settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0263] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0264] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0265] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0266] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0267] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0268] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the total reaction surface area of ​​the silver particles in the solution based on a first parameter of the silver particles in the solution during the current time period, a second parameter of the silver iodide, and the solution volume, including:

[0269] The theoretical mass of silver iodide is determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (which are inherent properties of silver particles), and the density of silver iodide.

[0270] The reaction surface area of ​​suspended silver particles is determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles.

[0271] The parameters for analyzing the sedimentation of silver are determined based on the coverage of silver particles at the bottom of the solution.

[0272] The reaction surface area of ​​the silver particles in the sedimentation silver was determined based on the analysis parameters of the sedimentation silver.

[0273] The total reaction surface area of ​​silver particles in the solution is determined based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0274] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0275] If the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the container containing the solution is used as the parameter for analyzing the sedimentation of silver.

[0276] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0277] If the coverage of silver particles on the bottom of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles will be used as the parameters for analyzing the precipitation of silver.

[0278] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the first chemical reaction rate constant of the solution includes: the reaction rate constant of silver with iodine, and the reaction rate constant of silver oxide with iodide ions;

[0279] Based on the total reaction surface area of ​​silver particles in the solution, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide formed in the solution during the current time period, including:

[0280] The first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0281] The rate of formation of the second silver iodide is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution.

[0282] The amount of silver iodide generated in the solution during the current time period is determined based on the first and second silver iodide generation rates.

[0283] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the first chemical reaction rate constant of the solution also includes: the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution;

[0284] The rate of formation of the second silver iodide is determined based on the specific surface area and molar mass of silver particles in the solution, as well as the reaction rate constant between silver oxide and iodide ions, including:

[0285] The amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution.

[0286] Based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution, determine the amount of silver oxide dissolved in the solution in the current time period.

[0287] The second silver iodide formation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution, which are inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

[0288] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the second chemical reaction rate constant includes: the rate constant for the decomposition reaction of silver iodide and the rate constant for the reverse reaction after the decomposition of silver iodide;

[0289] Based on the dose rate of the water pool inside the containment vessel and the second chemical reaction rate constant of the solution, determine the amount of silver iodide decomposed in the solution during the current time period, including:

[0290] The amount of silver iodide decomposed in the solution during the current time period is determined based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0291] The amount of silver iodide produced during the reverse reaction is determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide.

[0292] Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0293] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: The method further includes:

[0294] Based on the sedimentation rate of silver particles and the depth of the solution, determine the time it takes for silver particles to descend from the solution surface to the bottom of the solution.

[0295] Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths;

[0296] Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer are determined.

[0297] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: The method further includes:

[0298] The settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0299] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0300] The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume. The first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles. The second parameter includes the density of silver iodide and the existing mass of silver iodide formed. The solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident.

[0301] The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume.

[0302] The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution.

[0303] The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

[0304] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the total reaction surface area of ​​the silver particles in the solution based on a first parameter of the silver particles in the solution during the current time period, a second parameter of the silver iodide, and the solution volume, including:

[0305] The theoretical mass of silver iodide is determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (which are inherent properties of silver particles), and the density of silver iodide.

[0306] The reaction surface area of ​​suspended silver particles is determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles.

[0307] The parameters for analyzing the sedimentation of silver are determined based on the coverage of silver particles at the bottom of the solution.

[0308] The reaction surface area of ​​the silver particles in the sedimentation silver was determined based on the analysis parameters of the sedimentation silver.

[0309] The total reaction surface area of ​​silver particles in the solution is determined based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

[0310] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0311] If the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the container containing the solution is used as the parameter for analyzing the sedimentation of silver.

[0312] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: determining the analytical parameters for precipitated silver based on the coverage of silver particles at the bottom of the solution, including:

[0313] If the coverage of silver particles on the bottom of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles will be used as the parameters for analyzing the precipitation of silver.

[0314] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the first chemical reaction rate constant of the solution includes: the reaction rate constant of silver with iodine, and the reaction rate constant of silver oxide with iodide ions;

[0315] Based on the total reaction surface area of ​​silver particles in the solution, the first chemical reaction rate constant of the solution, and the solution volume, determine the amount of silver iodide formed in the solution during the current time period, including:

[0316] The first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine.

[0317] The rate of formation of the second silver iodide is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution.

[0318] The amount of silver iodide generated in the solution during the current time period is determined based on the first and second silver iodide generation rates.

[0319] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the first chemical reaction rate constant of the solution also includes: the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution;

[0320] The rate of formation of the second silver iodide is determined based on the specific surface area and molar mass of silver particles in the solution, as well as the reaction rate constant between silver oxide and iodide ions, including:

[0321] The amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution.

[0322] Based on the amount of silver oxide generated in the current time period and the reaction rate constant of silver oxide dissolution, determine the amount of silver oxide dissolved in the solution in the current time period.

[0323] The second silver iodide formation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution, which are inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

[0324] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: the second chemical reaction rate constant includes: the rate constant for the decomposition reaction of silver iodide and the rate constant for the reverse reaction after the decomposition of silver iodide;

[0325] Based on the dose rate of the water pool inside the containment vessel and the second chemical reaction rate constant of the solution, determine the amount of silver iodide decomposed in the solution during the current time period, including:

[0326] The amount of silver iodide decomposed in the solution during the current time period is determined based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool.

[0327] The amount of silver iodide produced during the reverse reaction is determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide.

[0328] Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

[0329] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: The method further includes:

[0330] Based on the sedimentation rate of silver particles and the depth of the solution, determine the time it takes for silver particles to descend from the solution surface to the bottom of the solution.

[0331] Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths;

[0332] Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer are determined.

[0333] In one embodiment, when the computer program is executed by a processor, it further performs the following steps: The method further includes:

[0334] The settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

[0335] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0336] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0337] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A solution analysis method for nuclear power plant accidents, characterized in that, The method includes: The total reaction surface area of ​​silver particles in the solution is determined based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume; wherein, the first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide formed; the solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident; The amount of silver iodide generated in the solution during the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume; wherein, the first chemical reaction rate constant of the solution includes: the reaction rate constant between silver and iodine, and the reaction rate constant between silver oxide and iodide ions; The amount of silver iodide decomposed in the solution during the current time period is determined based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution; wherein, the second chemical reaction rate constant includes: the silver iodide decomposition reaction rate constant and the reverse reaction rate constant after the decomposition of silver iodide; The remaining amount of silver iodide in the solution during the current time period is determined based on the amount of silver iodide generated and decomposed during the current time period.

2. The method according to claim 1, characterized in that, The determination of the total reaction surface area of ​​silver particles in the solution based on the first parameter of silver particles in the solution during the current time period, the second parameter of silver iodide, and the solution volume includes: The theoretical mass of silver iodide is determined based on the total number of silver particles in the solution during the current time period, the reactive thickness and radius of the silver particles (which are inherent properties of silver particles), and the density of silver iodide. The reaction surface area of ​​suspended silver particles is determined based on the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of silver particles. The parameters for analyzing the sedimentation of silver are determined based on the coverage of silver particles at the bottom of the solution. The reaction surface area of ​​the silver particles in the sedimentation is determined based on the sedimentation silver analysis parameters. The total reaction surface area of ​​silver particles in the solution is determined based on the reaction surface area of ​​suspended silver particles and the reaction surface area of ​​settled silver particles.

3. The method according to claim 2, characterized in that, The determination of sedimentation silver analysis parameters based on the coverage of silver particles at the bottom of the solution includes: If the coverage of silver particles on the bottom surface of the solution is greater than the coverage threshold, then the bottom area of ​​the pool containing the solution is used as the parameter for analyzing the sedimentation of silver.

4. The method according to claim 2, characterized in that, The determination of precipitation silver analysis parameters based on the coverage of silver particles at the bottom of the solution includes: If the coverage of silver particles on the bottom of the solution is less than or equal to the coverage threshold, then the theoretical mass of silver iodide, the existing mass of silver iodide, the solution volume, and the specific surface area and molar mass of the silver particles will be used as the parameters for analyzing the precipitation of silver.

5. The method according to claim 1, characterized in that, The amount of silver iodide generated in the solution during the current time period is determined based on the total reactive surface area of ​​silver particles in the solution, their inherent properties, the first chemical reaction rate constant of the solution, and the solution volume, including: The first silver iodide formation rate is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, and the reaction rate constant between silver and iodine. The rate of formation of the second silver iodide is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution. The amount of silver iodide generated in the solution during the current time period is determined based on the first and second silver iodide generation rates.

6. The method according to claim 5, characterized in that, The first chemical reaction rate constant of the solution also includes: the reaction rate constant of silver with oxygen, and the reaction rate constant of silver oxide dissolution; The determination of the second silver iodide formation rate based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions, inherent properties of silver particles in the solution, includes: The amount of silver oxide generated in the current time period is determined based on the total reaction surface area of ​​silver particles in the solution, the solution volume, the reaction rate constant between silver and oxygen, and the oxygen content in the solution. Based on the amount of silver oxide generated during the current time period and the reaction rate constant for the dissolution of silver oxide, the amount of silver oxide dissolved in the solution during the current time period is determined. The second silver iodide formation rate is determined based on the specific surface area, molar mass, and reaction rate constant of silver oxide with iodide ions in the solution, which are inherent properties of silver particles in the solution, as well as the amount of silver oxide dissolved in the solution during the current time period.

7. The method according to claim 1, characterized in that, The determination of the amount of silver iodide decomposed in the solution during the current time period based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution includes: The amount of silver iodide decomposed in the solution during the current time period is determined based on the amount of silver iodide dissolved in the solution, the rate constant of the silver iodide decomposition reaction, and the dose rate of the nuclear power plant reactor pool. The amount of silver iodide produced during the reverse reaction is determined based on the content of silver particles and iodine in the solution after decomposition, as well as the rate constant of the reverse reaction after the decomposition of silver iodide. Update the amount of silver iodide decomposed in the solution during the current time period based on the amount of silver iodide generated during the reverse reaction.

8. The method according to claim 2, characterized in that, Also includes: The time it takes for silver particles to descend from the solution surface to the bottom is determined based on the sedimentation rate of the silver particles and the depth of the solution. Based on the descent duration and the time step corresponding to the current period, the solution is divided into multiple solution layers of different depths; Based on the reaction surface area of ​​the suspended silver particles, the total reaction surface area, and the corresponding depth values ​​of each solution layer, the concentration changes of the settled silver particles and the suspended silver particles in each solution layer are determined.

9. The method according to claim 8, characterized in that, Also includes: The settling rate of silver particles is determined based on the diameter of the silver particles, the density of silver, the dynamic viscosity coefficient of the solution, and the density of the liquid medium.

10. A solution analysis device for nuclear power plant accidents, characterized in that, include: The first determining module is used to determine the total reaction surface area of ​​silver particles in the solution based on a first parameter of silver particles in the solution during the current time period, a second parameter of silver iodide, and the solution volume; wherein, the first parameter includes the inherent properties of silver particles, the total number of silver particles, and the concentration of silver particles; the second parameter includes the density of silver iodide and the existing mass of silver iodide formed; the solution is the solution in the water pool inside the reactor containment vessel after a nuclear power plant accident; The second determining module is used to determine the amount of silver iodide generated in the solution during the current time period based on the total reaction surface area of ​​silver particles in the solution, inherent properties, the first chemical reaction rate constant of the solution, and the solution volume; wherein, the first chemical reaction rate constant of the solution includes: the reaction rate constant of silver with iodine and the reaction rate constant of silver oxide with iodide ions; The third determining module is used to determine the amount of silver iodide decomposed in the solution during the current time period based on the dose rate of the water pool inside the containment and the second chemical reaction rate constant of the solution; wherein, the second chemical reaction rate constant includes: the silver iodide decomposition reaction rate constant and the reverse reaction rate constant after the decomposition of silver iodide; The fourth determination module is used to determine the remaining amount of silver iodide in the current time period based on the amount of silver iodide generated and decomposed in the solution during the current time period.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the solution analysis method for nuclear power plant accidents as described in any one of claims 1 to 9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the solution analysis method for nuclear power plant accidents as described in any one of claims 1 to 9.

13. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the solution analysis method for nuclear power plant accidents as described in any one of claims 1 to 9.

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