Method and equipment for calculating boron deposition mass of reactor and storage medium

Abstract

The invention provides a boron deposition mass calculation method and equipment of a reactor and a storage medium, and relates to the technical field of nuclear reactors. The method for calculating the boron deposition mass of the reactor provided by the invention comprises the following steps: calculating the deposition mass of a boron-lithium compound in dirt; calculating the boron adsorption mass of the dirt surface; and summing the boron lithium compound deposition mass and the boron adsorption mass to obtain the boron deposition mass. According to the method, two boron deposition mechanisms of boron lithium compound deposition and boron adsorption are considered, the total boron deposition mass is calculated in combination with the two deposition mechanisms, the boron deposition mass of the reactor is calculated, and the calculation result is more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear reactors, and in particular to a method, device and storage medium for calculating boron deposition mass of a reactor. Background Art

[0002] Reactor core fouling-induced axial power deviation (CIPS) and local cladding corrosion (CILC) will affect the safety and economy of reactor operation, and is also one of the key challenges for improving the performance of pressurized water reactors, which has attracted increasing attention in the nuclear power industry. The phenomenon caused by reactor core fouling is an important factor affecting the safety and economy of reactor operation, and the risk assessment of reactor core fouling may become an important issue of concern to the industry in the future.

[0003] When the reactor is in operation, corrosion products (nickel, iron, etc.) on the coolant system pipes will be released into the coolant and deposited on the surface of the fuel assembly cladding to form scale. Boron and lithium hydroxide gather in the pores of the scale. When boron gathers to a certain extent, it will precipitate on the scale, causing the power of the upper part of the fuel assembly to decrease, and the power peak will move downward, that is, the CIPS phenomenon occurs. Summary of the invention

[0004] In view of this, the present application provides a method, device and storage medium for calculating the boron deposition mass of a reactor, so as to realize the calculation of the boron deposition mass of the reactor, thereby accurately assessing the CIPS risk.

[0005] In a first aspect, the present application provides a method for calculating boron deposition mass of a reactor, comprising:

[0006] Calculate the mass of boron-lithium compound deposits inside the dirt;

[0007] Calculate the mass of boron adsorbed on the dirt surface;

[0008] The boron deposition mass is obtained by summing the boron lithium compound deposition mass and the boron adsorption mass.

[0009] In a possible implementation, the calculating the deposited mass of boron-lithium compounds inside the dirt includes:

[0010] Obtain the thickness of the boron deposition layer inside the dirt;

[0011] The boron-lithium compound deposition mass is calculated based on the boron deposition layer thickness, the boron concentration in the coolant and the concentration factor.

[0012] In a possible implementation, obtaining the thickness of the boron deposition layer inside the dirt includes:

[0013] Obtain the concentration of target substances inside the dirt;

[0014] The boron deposition layer thickness is obtained based on the concentration of the target substance, the solubility of the deposited boron lithium compound, and the thickness of the scale.

[0015] In a possible implementation, obtaining the concentration of the target substance inside the dirt includes:

[0016] Divide the dirt into multiple layers of grids based on dirt thickness;

[0017] Calculating the concentration of the target substance at the grid;

[0018] The step of obtaining the thickness of the boron deposition layer based on the concentration of the target substance, the solubility of the deposited boron-lithium compound and the thickness of the dirt comprises:

[0019] When the concentration of the target substance at the grid exceeds the solubility of the deposited boron-lithium compound, the thickness of the boron deposition layer is obtained based on the thickness of the dirt and the position of the grid.

[0020] In a possible implementation manner, calculating the concentration of the target substance at the grid includes:

[0021] Constructing a mass flow convection equation for the liquid phase in the dirt based on the diffusion coefficient of the target substance in the liquid phase in the dirt, the total mass flow rate of the target substance at the grid in the liquid phase in the dirt, and the mass concentration of the target substance at the grid in the liquid phase in the dirt;

[0022] Constructing a mass flow convection equation for the vapor phase in the dirt based on the diffusion coefficient of the target substance in the vapor phase in the dirt, the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the mass concentration of the target substance at the grid in the vapor phase in the dirt;

[0023] Based on the mass flow convection equation of the liquid phase in the dirt, the mass flow convection equation of the vapor phase in the dirt, the relationship between the total mass flow rate of the target substance at the grid in the liquid phase in the dirt and the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the relationship between the mass concentration of the target substance at the grid in the liquid phase in the dirt and the mass concentration of the target substance at the grid in the vapor phase in the dirt, the mass concentration of the target substance at the grid in the liquid phase in the dirt is solved, and the mass concentration of the target substance at the grid in the liquid phase in the dirt obtained is used as the concentration of the target substance at the grid.

[0024] In a possible implementation, obtaining the thickness of the boron deposition layer inside the dirt further includes:

[0025] The solubility of the deposited boron-lithium compound is obtained based on the internal temperature of the scale.

[0026] In a possible implementation, the calculating the boron adsorption mass on the dirt surface includes:

[0027] Obtaining the boron concentration on the cladding surface;

[0028] The boron adsorption mass is calculated based on the boron concentration and the fouling mass on the cladding surface.

[0029] In a possible implementation, obtaining the boron concentration on the surface of the cladding includes:

[0030] The boron concentration at the cladding surface is calculated based on the concentration factor and the boron concentration in the coolant.

[0031] In a second aspect, the present application provides a computing device, including:

[0032] at least one processor; and

[0033] At least one memory having instructions stored thereon, which, when executed individually or collectively by the at least one processor, cause the computing device to perform the method according to the first aspect.

[0034] In a third aspect, the present application provides a computer storage medium having instructions stored thereon, which, when executed individually or collectively by at least one processor of a computing device, causes the computing device to execute the method described in the first aspect.

[0035] Compared with the prior art, this application has the following advantages:

[0036] The boron deposition mass calculation method of the reactor provided in the present application includes: calculating the boron-lithium compound deposition mass inside the dirt; calculating the boron adsorption mass on the dirt surface; summing the boron-lithium compound deposition mass and the boron adsorption mass to obtain the boron deposition mass. The present application considers two boron deposition mechanisms, boron-lithium compound deposition and boron adsorption, and calculates the total boron deposition mass by combining these two deposition mechanisms, thereby realizing the calculation of the boron deposition mass of the reactor and making the calculation result more accurate, thereby being able to more accurately assess the CIPS risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0038] Figure 1 It is a schematic flow chart of a method for calculating boron deposition mass of a reactor provided in an embodiment of the present application;

[0039] Figure 2 is a schematic diagram of a dirt grid division provided in an embodiment of the present application;

[0040] Figure 3 It is a structural diagram of a computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0042] As shown in this application, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0043] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In addition, although the terms used in this application are selected from well-known and commonly used terms, some of the terms mentioned in this application specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0046] Flowcharts are used in this application to illustrate the operations performed by the apparatus or equipment according to the embodiments of the application. It should be understood that the preceding or following operations are not necessarily performed precisely in order. On the contrary, the steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0047] Figure 1 FIG. 1 is a flow chart of a method for calculating boron deposition mass of a reactor provided in an embodiment of the present application. Figure 1 As shown, the method for calculating the boron deposition mass of the reactor includes the following steps:

[0048] Step S110, calculating the deposited mass of boron-lithium compounds inside the dirt.

[0049] The mass of boron-lithium compounds deposited inside the dirt, i.e., the mass of boron-lithium compounds deposited inside the dirt, can be calculated by a certain relationship, such as the mass of boron-lithium compounds deposited inside the dirt can be calculated based on the thickness of the boron deposition layer, the boron concentration in the coolant, and the concentration factor. In some embodiments, calculating the mass of boron-lithium compounds deposited inside the dirt includes the following steps:

[0050] Step S1101, obtaining the thickness of the boron deposition layer inside the dirt.

[0051] The thickness of the boron deposition layer inside the dirt can be calculated based on the dirt thickness, such as based on the relationship between the thickness of the boron deposition layer inside the dirt and the dirt thickness fitted according to experimental data, or based on the concentration of the target substance (lithium, boron, etc.) inside the dirt and the dirt thickness.

[0052] In some embodiments, obtaining the thickness of the boron deposition layer inside the dirt includes: obtaining the concentration of the target substance inside the dirt; obtaining the thickness of the boron deposition layer based on the concentration of the target substance, the solubility of the deposited boron lithium compound and the thickness of the dirt. Among them, obtaining the concentration of the target substance inside the dirt includes: dividing the dirt into multiple layers of grids based on the thickness of the dirt; calculating the concentration of the target substance at the grid. Accordingly, obtaining the thickness of the boron deposition layer based on the concentration of the target substance, the solubility of the deposited boron lithium compound and the thickness of the dirt includes: when the concentration of the target substance at the grid exceeds the solubility of the deposited boron lithium compound, obtaining the thickness of the boron deposition layer based on the thickness of the dirt and the position of the grid. The embodiment of the present application divides the dirt into multiple layers of grids and performs calculations based on grid units, so that the calculation results are more accurate.

[0053] Since the microstructure of dirt is a capillary porous body, the porous body is considered to be a group of interconnected pipes, with larger vertical pores filled with steam and smaller pores filled with liquid. Considering the diffusion of target substances (lithium, boron, etc.) inside the dirt and the convection caused by mass flow in the dirt, the mass flow convection equations are constructed for the liquid phase and vapor phase in the dirt respectively, and then the concentration of the target substance inside the dirt is obtained by solving it, making the calculation results more accurate. In detail, calculating the concentration of the target substance at the grid includes: constructing a mass flow convection equation for the liquid phase in the dirt based on the diffusion coefficient of the target substance in the liquid phase in the dirt, the total mass flow rate of the target substance at the grid in the liquid phase in the dirt, and the mass concentration of the target substance at the grid in the liquid phase in the dirt; constructing a mass flow convection equation for the vapor phase in the dirt based on the diffusion coefficient of the target substance in the vapor phase in the dirt, the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the mass concentration of the target substance at the grid in the vapor phase in the dirt; solving the mass concentration of the target substance at the grid in the liquid phase in the dirt based on the mass flow convection equation for the liquid phase in the dirt, the mass flow convection equation for the vapor phase in the dirt, the total mass flow rate of the target substance at the grid in the liquid phase in the dirt and the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the relationship between the mass concentration of the target substance at the grid in the liquid phase in the dirt and the mass concentration of the target substance at the grid in the vapor phase in the dirt, and using the solved mass concentration of the target substance at the grid in the liquid phase in the dirt as the concentration of the target substance at the grid.

[0054] In an exemplary embodiment, obtaining the thickness of the boron deposition layer inside the dirt includes the following steps:

[0055] Step S1111, dividing the grid.

[0056] Please refer to Figure 2, dirt is deposited on the surface of the fuel assembly cladding. The grid is evenly divided based on the given dirt thickness, and the thickness of each grid layer is dx. The grids are divided in sequence from the dirt surface (close to the fluid side) to the cladding surface and the parameters at each grid layer are determined. For example, if the dirt is evenly divided into N-1 layers of grids, the N-1 layers of grids share N surfaces, namely surfaces x(1), x(2), ..., x(n), x(n+1), ..., x(N). The thickness of the nth grid layer is dx(n). It can be understood that, considering the large surface size of the fuel assembly cladding, each layer of grids can also be divided into multiple grids in a direction perpendicular to the direction of dirt deposition, and calculations are performed cyclically for each grid.

[0057] In the above embodiment, the grid is divided sequentially from the dirt surface to the cladding surface. In some other embodiments, the grid may also be divided sequentially from the cladding surface to the dirt surface, which is not limited in the embodiments of the present application.

[0058] Step S1112: Calculate the concentration of the target substance at the grid, wherein the target substance may include lithium, or boron, or lithium and boron.

[0059] Considering the diffusion of the target substances (lithium, boron, etc.) inside the dirt and the convection caused by the mass flow inside the dirt, the mass flow convection equations are constructed for the liquid phase and the vapor phase inside the dirt. Among them, at the k-th grid layer, the mass flow convection equations for the liquid phase inside the dirt and the mass flow convection equations for the vapor phase inside the dirt are respectively as follows:

[0060] (1)

[0061] (2)

[0062] (3)

[0063] Where: G i,l,k is the total mass flow rate of target substance i at the k-layer grid in the liquid phase of the dirt, in kg / s·m 2 ;

[0064] D i,l is the diffusion coefficient of target substance i in the liquid phase of the dirt, in m 2 / s, where l represents the liquid phase;

[0065] is the density of the liquid phase in the dirt, in kg / m 3 ;

[0066] A l The flow area of ​​the dirt filled with liquid phase, in m 2 ;

[0067] Ci,l,k is the mass concentration of target substance i at the k-layer grid in the liquid phase of the dirt, in ppb;

[0068] G l is the mass flow rate of the liquid phase in the dirt, in kg / s·m 2 ;

[0069] G i,v,k is the total mass flow rate of target substance i at the k-layer grid in the vapor phase of the dirt, in kg / s·m 2 ;

[0070] D i,v is the diffusion coefficient of target substance i in the vapor phase of the dirt, in m 2 / s, where v represents the vapor phase;

[0071] is the vapor phase density in the dirt, in kg / m 3 ;

[0072] A v The flow area of ​​the dirt filled with vapor phase, in m 2 ;

[0073] C i,l,v is the mass concentration of the target substance at the k-layer grid in the vapor phase in the dirt, in ppb;

[0074] G v is the mass flow rate of the vapor phase in the dirt, in kg / s·m 2 ;

[0075] B is the coefficient.

[0076] In steady state, the net flow of target substance i at any position in the dirt is 0, and the following relationship exists at the k-layer grid:

[0077] (4)

[0078] By combining equations (1)-(4), we can obtain C i,l,k , the solved C i,l,k as the concentration of target substance i at the grid.

[0079] Step S1113, calculating the thickness of the boron deposition layer.

[0080] Based on the concentration distribution of the target substance inside the dirt, it is determined whether the target substance at the grid has reached the critical concentration, that is, whether it exceeds the solubility of the deposited boron-lithium compound, thereby obtaining the thickness d of the boron deposition layer. B . Boron deposition layer thickness d B The calculation formula example is as follows:

[0081] (5)

[0082] Among them, d B is the thickness of the boron deposition layer, in m;

[0083] d c is the dirt thickness, in m;

[0084] x(j) is the thickness from the dirt surface to the jth grid layer, assuming that the concentration of target substance i at the jth grid layer exceeds the solubility of the deposited boron-lithium compound. If the thickness of each grid layer is dx, then the thickness from the dirt surface to the jth grid layer is j·dx, in meters.

[0085] The solubility of the deposited boron-lithium compound can be input by the user or obtained based on the internal temperature of the dirt. For example, the solubility of the deposited boron-lithium compound is obtained based on an empirical relationship related to temperature:

[0086] SI = f(T) (6)

[0087] Wherein, SI is the solubility of the deposited boron-lithium compound, in ppb;

[0088] T is the internal temperature of the dirt, in °C.

[0089] Step S1102: Calculate the deposition mass of the boron-lithium compound based on the thickness of the boron deposition layer, the boron concentration in the coolant, and the concentration factor.

[0090] In some embodiments, the calculation formula for the deposition mass of the boron-lithium compound is as follows:

[0091] (7)

[0092] Among them, M b,1 is the mass of boron-lithium compound deposition, in kg;

[0093] k B is the concentration factor;

[0094] C coolant B is the boron concentration in the coolant, in ppb;

[0095] is the coolant density, in kg / m 3 ;

[0096] A is the calculated area of ​​the cladding surface, in m 2 .

[0097] Step S120: Calculate the boron adsorption mass on the dirt surface.

[0098] The boron adsorption mass on the dirt surface, i.e., the boron mass adsorbed on the dirt surface, can be calculated by a certain relationship, such as the boron adsorption mass can be calculated based on the boron concentration on the shell surface and the dirt mass. In some embodiments, calculating the boron adsorption mass on the dirt surface includes the following steps:

[0099] Step S1201, obtaining the boron concentration on the surface of the cladding.

[0100] The boron concentration on the cladding surface can be input by the user or calculated based on a related calculation formula. In an exemplary embodiment, the boron concentration on the cladding surface is calculated based on the concentration factor and the boron concentration in the coolant. The calculation relationship is as follows:

[0101] (8)

[0102] (9)

[0103] Among them, C clad B is the boron concentration on the cladding surface, in ppb;

[0104] C coolant B is the boron concentration in the coolant, in ppb;

[0105] CF B is the concentration factor;

[0106] m e is the mass evaporation rate of the dirt surface, in kg / s·m 2 ;

[0107] d c is the dirt thickness, in m;

[0108] is the coolant density, in kg / m 3 ;

[0109] D B is the diffusion coefficient of boron in the coolant, in m 2 / s;

[0110] P is the dirt porosity.

[0111] Step S1202: Calculate the boron adsorption mass based on the boron concentration and the dirt mass on the cladding surface.

[0112] In actual operation, the mass of boron adsorbed on the fouling surface can be obtained based on the relationship between the boron adsorption mass, the boron concentration on the cladding surface and the fouling mass fitted according to the experimental data. The relationship is shown below:

[0113] (10)

[0114] Among them, b 1 、b 2 and b 3 is a constant;

[0115] M crud is the mass of dirt, in kg;

[0116] C clad B is the boron concentration on the cladding surface, in ppb.

[0117] Step S130, summing the boron-lithium compound deposition mass and the boron adsorption mass to obtain the boron deposition mass.

[0118] Combining the boron-lithium compound deposition mass and the boron adsorption mass, the total boron deposition mass M can be obtained. b , the relationship example is as follows:

[0119] (11)

[0120] The present application considers two boron deposition mechanisms, namely boron-lithium compound deposition and boron adsorption, and combines these two deposition mechanisms to calculate the total boron deposition mass, thereby realizing the calculation of the boron deposition mass of the reactor and making the calculation results more accurate.

[0121] Figure 3 Schematic diagram of a computing device provided in an embodiment of the present application. Figure 3 As shown, computing device 300 includes one or more processors 310 , one or more memories 320 coupled to processor 310 , and one or more communication modules 340 coupled to processor 310 .

[0122] The communication module 340 is used for two-way communication. The communication module 340 has at least one antenna to facilitate communication. The communication interface may represent any interface necessary for communicating with other network elements.

[0123] Processor 310 may be of any type suitable for the local technology network, and may include, as non-limiting examples, one or more of: a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Computing device 300 may have multiple processors, such as application specific integrated circuit chips, which are driven in time to a clock that synchronizes a master processor.

[0124] The memory 320 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 324, electrically programmable read-only memory (EPROM), flash memory, hard disk, compact disk (CD), digital video disk (DVD), and other magnetic and / or optical memories. Examples of volatile memories include, but are not limited to, random access memory (RAM) 322 and other volatile memories that do not persist during the duration of a power outage.

[0125] The computer program 330 includes computer executable instructions that are executed by the associated processor 310. The computer program 330 may be stored in the ROM 324. The processor 310 may perform any suitable actions and processes by loading the computer program 330 into the RAM 322.

[0126] The embodiments of the present application can be implemented by a computer program 330, so that the computing device 300 can execute the reference Figure 1 Any process disclosed in the discussion. The embodiments of the present application may also be implemented by hardware or by a combination of software and hardware.

[0127] In some embodiments, the computer program 330 may be tangibly embodied in a computer-readable medium, which may be contained in the computing device 300 (e.g., memory 320) or other storage device accessible to the computing device 300. The computing device 300 may load the computer program 330 from the computer-readable medium to the RAM 322 for execution. The computer-readable medium may include any type of tangible non-volatile memory, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. The computer-readable medium has the computer program 330 stored thereon.

[0128] Generally, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be performed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present application are shown and described as block diagrams, flow charts, or using some other graphical representations, it should be understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0129] The present application also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer executable instructions, such as instructions included in program modules, which are executed in a device on a target real or virtual processor to perform the above-mentioned reference Figure 1 The method described. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or separated between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in local and remote storage media.

[0130] The program code for executing the method of the present application can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing equipment so that when the program code is executed by the processor or controller, the function / operation specified in the flow chart and / or the block diagram is realized. The program code can be executed completely on the machine as an independent software package, partially on the machine, partially on the machine, partially on a remote machine, partially on a remote machine, or all on a remote machine or server.

[0131] In the context of this application, computer program codes or related data may be carried by any appropriate carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0132] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or apparatuses, or any suitable combination of the foregoing. More specific examples of computer readable storage media include an electrical connection having one or more conductors, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0133] In addition, although the operations are described in a specific order, this should not be construed as requiring to perform these operations in the specific order or sequence shown, or to perform all the operations shown, to obtain the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these details should not be interpreted as limiting the scope of the application, but can be interpreted as a description of the specific features of a particular embodiment. Some of the features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0134] Although the present application has been described in language specific to structural features and / or methodological acts, it should be understood that the present application defined in the appended claims is not necessarily limited to the specific features or acts described above. Instead, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A method for calculating boron deposition mass of a reactor, characterized in that: include: Calculate the deposited mass of boron-lithium compounds inside the dirt; Calculate the mass of boron adsorbed on the dirt surface; The boron deposition mass is obtained by summing the boron-lithium compound deposition mass and the boron adsorption mass.

2. The method according to claim 1, characterized in that The calculation of the boron-lithium compound deposition mass inside the dirt includes: Obtain the thickness of the boron deposition layer inside the dirt; The boron-lithium compound deposition mass is calculated based on the boron deposition layer thickness, the boron concentration in the coolant and the concentration factor.

3. The method according to claim 2, characterized in that The step of obtaining the thickness of the boron deposition layer inside the dirt comprises: Obtain the concentration of target substances inside the dirt; The boron deposition layer thickness is obtained based on the concentration of the target substance, the solubility of the deposited boron lithium compound, and the thickness of the scale.

4. The method according to claim 3, characterized in that The step of obtaining the concentration of the target substance inside the dirt comprises: Divide the dirt into multiple layers of grids based on dirt thickness; Calculating the concentration of the target substance at the grid; The step of obtaining the thickness of the boron deposition layer based on the concentration of the target substance, the solubility of the deposited boron-lithium compound and the thickness of the dirt comprises: When the concentration of the target substance at the grid exceeds the solubility of the deposited boron-lithium compound, the thickness of the boron deposition layer is obtained based on the thickness of the dirt and the position of the grid.

5. The method according to claim 4, characterized in that The calculating the concentration of the target substance at the grid comprises: Constructing a mass flow convection equation for the liquid phase in the dirt based on the diffusion coefficient of the target substance in the liquid phase in the dirt, the total mass flow rate of the target substance at the grid in the liquid phase in the dirt, and the mass concentration of the target substance at the grid in the liquid phase in the dirt; Constructing a mass flow convection equation for the vapor phase in the dirt based on the diffusion coefficient of the target substance in the vapor phase in the dirt, the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the mass concentration of the target substance at the grid in the vapor phase in the dirt; Based on the mass flow convection equation of the liquid phase in the dirt, the mass flow convection equation of the vapor phase in the dirt, the relationship between the total mass flow rate of the target substance at the grid in the liquid phase in the dirt and the total mass flow rate of the target substance at the grid in the vapor phase in the dirt, and the relationship between the mass concentration of the target substance at the grid in the liquid phase in the dirt and the mass concentration of the target substance at the grid in the vapor phase in the dirt, the mass concentration of the target substance at the grid in the liquid phase in the dirt is solved, and the mass concentration of the target substance at the grid in the liquid phase in the dirt obtained is used as the concentration of the target substance at the grid.

6. The method according to claim 3, characterized in that The step of obtaining the thickness of the boron deposition layer inside the dirt further comprises: The solubility of the deposited boron-lithium compound is obtained based on the internal temperature of the scale.

7. The method according to claim 1, characterized in that The calculation of the boron adsorption mass on the dirt surface includes: Obtaining the boron concentration on the cladding surface; The boron adsorption mass is calculated based on the boron concentration and the fouling mass on the cladding surface.

8. The method according to claim 7, characterized in that The step of obtaining the boron concentration on the surface of the cladding comprises: The boron concentration at the cladding surface is calculated based on the concentration factor and the boron concentration in the coolant.

9. A computing device, characterized in that: include: at least one processor; as well as At least one memory having instructions stored thereon, which, when executed individually or collectively by the at least one processor, cause the computing device to perform the method according to any one of claims 1 to 8.

10. A computer storage medium, characterized in that: The computer storage medium stores instructions, which, when executed individually or collectively by at least one processor of a computing device, cause the computing device to perform the method according to any one of claims 1 to 8.

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