Method for determining chemical cleaning parameters of steam generator of nuclear power plant and related device

Abstract

The invention discloses a method for determining chemical cleaning parameters of a nuclear power plant steam generator and a related device, and the method comprises the steps: constructing a geometric model of the steam generator, and constructing an internal flow field calculation model of a heat transfer tube of the steam generator at different temperatures and different flows based on the geometric model of the steam generator; determining a flow range of chemical cleaning based on the calculation model; based on the flow range of chemical cleaning, a chemical cleaning dynamic experiment is conducted in a laboratory, and the temperature, the medicine concentration, the cleaning flow speed and material corrosion data of chemical cleaning are determined; according to the flow range of chemical cleaning, the total water loading amount of the chemical cleaning system is calculated; equipment model selection is carried out according to the cleaning flow speed; and determining the quantity of the medicines according to the concentration of the medicines and the total water loading amount. The method and the related device can accurately calculate the chemical cleaning parameters of the steam generator.

Description

Technical Field

[0001] This invention belongs to the field of chemical cleaning of direct-flow steam generators in nuclear power plants, and relates to a method and related apparatus for determining chemical cleaning parameters of steam generators in nuclear power plants. Background Technology

[0002] The steam generator is one of the key core pieces of equipment in a nuclear power plant. As a primary loop pressure boundary device, it transfers heat from the nuclear reactor to the secondary loop feedwater for heat exchange, generating steam to drive the turbine generator. The working principle of a nuclear power plant's direct-flow steam generator is similar to that of a thermal power plant's direct-flow boiler; both are direct-flow heat exchange devices. Due to the effects of accelerated flow, corrosion products, impurities, and high-temperature oxidation, impurities and dissolved ions in the water are carried into the steam generator by the feedwater, condensing and depositing inside the heat transfer tubes, resulting in scaling or oxide deposits similar to those on the water-cooled walls of thermal power units. Scaling in the steam generator's heat transfer tubes directly affects the equipment's thermal efficiency and safety: it leads to decreased heat transfer efficiency, increased flow resistance, and even overheating or blockage of the heat transfer tubes, significantly impacting the stable operation of the nuclear power unit.

[0003] Chemical cleaning of thermal power boilers is generally carried out according to standards GB / T34355-2017 "Rules for Chemical Cleaning of Steam and Hot Water Boilers" and DL / T794-2024 "Guidelines for Chemical Cleaning of Boilers in Thermal Power Plants" to remove scale from the walls of heat transfer tubes. Citric acid is used as the main cleaning agent, with the temperature generally controlled at 80-95℃ and the flow rate at 0.5-1m / s. EDTA is used as the main cleaning agent, with the temperature generally controlled at 110-140℃ and the flow rate at 0.5-1m / s.

[0004] In actual chemical cleaning of thermal power boilers, the flow rate calculated based on the actual flow rate may encounter problems such as insufficient or excessive flow rate of the cleaning pump, leading to failure to meet standard requirements. Furthermore, the calculated flow rate is an average flow rate, which cannot guarantee the uniformity of flow rate within thousands of heat exchange tubes, potentially resulting in localized over-cleaning or incomplete cleaning.

[0005] Currently, mainstream fourth-generation nuclear reactors both domestically and internationally, such as high-temperature gas-cooled reactors, sodium-cooled fast reactors, and molten salt reactors, all employ direct-flow steam generators. Because nuclear power steam generators are nuclear-grade equipment, their heat transfer tubes are only about 2mm thick, far thinner than the 6-10mm thickness of the water-cooled walls in thermal power boilers, resulting in a lower margin. Therefore, the control of the cleaning flow rate requires greater precision to ensure good consistency between the steam generator's cleaning effect and laboratory conditions. This facilitates better evaluation of the chemical cleaning effect and avoids localized over-cleaning or incomplete cleaning caused by uneven flow rate distribution. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and related apparatus for determining the chemical cleaning parameters of a nuclear power plant steam generator. This method and apparatus can accurately calculate the chemical cleaning parameters of the steam generator.

[0007] To achieve the above objectives, this invention discloses a method for determining chemical cleaning parameters of a nuclear power plant steam generator, comprising: A geometric model of a steam generator is constructed, and based on the geometric model of the steam generator, a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates is constructed. Based on the calculation model, the flow rate range for chemical cleaning is determined; Based on the flow range of the chemical cleaning, dynamic chemical cleaning experiments were conducted in the laboratory to determine the temperature, chemical concentration, cleaning flow rate, and material corrosion data of the chemical cleaning. Calculate the total water volume of the chemical cleaning system based on the flow rate range of the chemical cleaning process. Equipment selection is based on the cleaning flow rate; the quantity of medicine is determined based on the drug concentration and the total water volume.

[0008] Furthermore, the process of constructing a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates based on the geometric model of the steam generator is as follows: The physical equations and boundary conditions for the feedwater are set, and a numerical model of the feedwater side flow field is established based on the geometric model of the steam generator. Based on the established numerical model of the feedwater side flow field, a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates is constructed.

[0009] Furthermore, the process of determining the flow range for chemical cleaning based on the aforementioned calculation model is as follows: The calculation model was analyzed, and a range was selected in which the internal flow field of the steam generator was uniformly distributed, the average flow velocity of all heat transfer tubes met the standard requirement of 0.5-1m / s, and there were no dead zones, blind zones, or areas where the flow velocity was greater than the preset flow velocity. The total flow rate corresponding to this flow velocity was used as the initial flow range.

[0010] Furthermore, the chemicals that need to be added include the main cleaning agent, corrosion inhibitor, solvent accelerator, reducing agent, and pH adjuster.

[0011] Furthermore, it also includes: During the chemical cleaning process, the system flow rate of the chemical cleaning system is adjusted according to the calculated reference flow rate to ensure that the deviation between the two does not exceed 10%; the corresponding amount of chemical cleaning chemicals is added according to the calculated amount of chemicals.

[0012] Furthermore, it also includes: After the chemical cleaning agent is added to the system, a sample is taken to analyze the agent concentration, and then compared with the determined agent concentration to verify the rationality of the total water volume.

[0013] Furthermore, it also includes: after the chemical cleaning is completed, comparing the corrosion data of the samples hanging in the chemical cleaning system and the laboratory samples to verify the rationality of the calculation model; If the total corrosion amount and corrosion rate of the samples in the chemical cleaning system and the laboratory samples do not differ by more than 20%, then the selection of chemical cleaning flow rate and chemical concentration is considered reasonable.

[0014] This invention discloses a system for determining chemical cleaning parameters of a nuclear power plant steam generator, comprising: The construction module is used to construct the geometric model of the steam generator, and based on the geometric model of the steam generator, to construct a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates. The first determining module is used to determine the flow range of chemical cleaning based on the calculation model; The second determining module is used to conduct dynamic chemical cleaning experiments in the laboratory based on the flow range of the chemical cleaning to determine the temperature, chemical concentration, cleaning flow rate and material corrosion data of the chemical cleaning. The calculation module is used to calculate the total water volume of the chemical cleaning system based on the flow range of the chemical cleaning process. The third determining module is used to select equipment based on the cleaning flow rate and to determine the quantity of medicine based on the drug concentration and the total water volume.

[0015] This invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method for determining chemical cleaning parameters of a nuclear power plant steam generator.

[0016] The present invention discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for determining chemical cleaning parameters of a nuclear power plant steam generator.

[0017] The present invention has the following beneficial effects: The method and related apparatus for determining chemical cleaning parameters of nuclear power plant steam generators described in this invention, in specific operation, determine the flow range for chemical cleaning based on a calculation model of the internal flow field of the heat transfer tubes of the steam generator at different temperatures and flow rates; based on the flow range, dynamic chemical cleaning experiments are conducted in the laboratory to determine the temperature, chemical concentration, cleaning flow rate, and material corrosion data; the total water volume of the chemical cleaning system is calculated according to the flow range; equipment is selected based on the cleaning flow rate; and the quantity of chemicals is determined based on the chemical concentration and the total water volume. This method achieves comprehensive and accurate determination of parameters such as equipment, chemical quantity, cleaning flow rate, temperature, and total water volume. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0024] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0025] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0028] Example 1 refer to Figure 1 The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to the present invention includes the following steps: 1) Establish a model; The geometric model of the steam generator was drawn using 3D drawing software, mainly focusing on the geometric structure of the main scale deposits, such as the feedwater inlet, chamber, tube sheet, throttling assembly, and heat transfer tubes. The geometric model of the steam generator to be cleaned was established, the physical equations and boundary conditions of the feedwater were set, and a numerical model of the feedwater flow field was established. The internal flow field calculation model of the heat transfer tube of the steam generator was simulated and calculated under different temperatures and flow rates, and the inlet pressure, outlet pressure, flow rate, temperature, average velocity and relative deviation in a single heat transfer tube, and total flow rate of the steam generator were obtained.

[0029] 2) Flow field analysis; The calculation model was analyzed, and a range was selected where the internal flow field of the steam generator was uniform (flow velocity deviation did not exceed ±10%), the average flow velocity of all heat transfer tubes met the standard requirement of 0.5-1m / s, and there were no dead zones, blind zones, or areas with excessive flow velocity. The total flow rate corresponding to this flow velocity was used as the initial flow range for screening.

[0030] 3) Dynamic experiments; During the dynamic chemical cleaning experiments conducted in the laboratory, based on the flow rate range obtained in step 2), tests were carried out at different temperatures, flow rates, and cleaning agent concentrations. Based on the experimental results, the corresponding temperature, agent concentration, cleaning flow rate, and material corrosion data for chemical cleaning were determined. These data serve as benchmark reference data for the on-site chemical cleaning process.

[0031] 4) Calculation of water volume; Calculate the total water volume (water capacity) of the relevant formal and temporary systems within the scope of chemical cleaning, including the internal volume of equipment such as pipes, containers, and heat exchangers.

[0032] 5) Equipment selection; Calculate the reference flow rate for the actual chemical cleaning flow rate based on the cleaning flow rate obtained in step 3), and select cleaning equipment such as pipes, pumps, valves, and heat exchangers that meet the parameters according to the cleaning flow rate.

[0033] 6) Determine the quantity of medicines; Based on the drug concentration obtained in step 3) and the total water volume of the system obtained in step 4), calculate the amount of chemicals to be added for chemical cleaning. The chemicals to be added include a combination of main cleaning agent, corrosion inhibitor, solvent, reducing agent, pH adjuster, etc.

[0034] 7) Process control; During the chemical cleaning process, adjust the system flow rate of the chemical cleaning system according to the reference flow rate calculated in step 5) to ensure that the flow rate deviation between the two does not exceed 10%; add the corresponding chemical cleaning chemicals according to the quantity of chemicals calculated in step 6).

[0035] 8) Verification of water volume; After the chemicals are added to the chemical cleaning system, samples are taken to analyze the chemical concentration, which is then compared with the concentration obtained in step 3) to verify the rationality of the total water volume calculated in step 4). If the deviation between the actual chemical concentration and the laboratory-verified chemical concentration does not exceed 10%, the calculation of the total water volume for chemical cleaning is considered reasonable.

[0036] 9) Corrosion data verification; After chemical cleaning, the corrosion data of the samples attached to the chemical cleaning system and the laboratory samples are compared to verify the rationality of the models in steps 1) and 2). If the total corrosion amount and corrosion rate of the samples attached to the chemical cleaning system and the laboratory samples do not differ by more than 20%, then the selection of chemical cleaning flow rate and chemical concentration parameters is considered reasonable.

[0037] Example 2 The nuclear power plant steam generator chemical cleaning parameter determination system of the present invention includes: The construction module is used to construct the geometric model of the steam generator, and based on the geometric model of the steam generator, to construct a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates. The first determining module is used to determine the flow range of chemical cleaning based on the calculation model; The second determining module is used to conduct dynamic chemical cleaning experiments in the laboratory based on the flow range of the chemical cleaning to determine the temperature, chemical concentration, cleaning flow rate and material corrosion data of the chemical cleaning. The calculation module is used to calculate the total water volume of the chemical cleaning system based on the flow range of the chemical cleaning process. The third determining module is used to select equipment based on the cleaning flow rate and to determine the quantity of medicine based on the drug concentration and the total water volume.

[0038] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in each embodiment of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0039] Example 3 A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of a method for determining chemical cleaning parameters for a nuclear power plant steam generator. For example, the method includes: constructing a geometric model of the steam generator; based on the geometric model, constructing a calculation model of the internal flow field of the heat transfer tubes of the steam generator at different temperatures and flow rates; determining the flow rate range for chemical cleaning based on the calculation model; conducting dynamic chemical cleaning experiments in a laboratory based on the flow rate range to determine the temperature, chemical concentration, cleaning flow rate, and material corrosion data for chemical cleaning; calculating the total water volume of the chemical cleaning system according to the flow rate range; selecting equipment based on the cleaning flow rate; and determining the quantity of chemicals based on the chemical concentration and the total water volume. The memory may include main memory, such as high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device. The processor, network interface, and memory are interconnected via an internal bus, which may be an industry standard architecture bus, a peripheral component interconnection standard bus, an extended industry standard architecture bus, etc. The bus can be divided into address bus, data bus, control bus, etc. The memory is used to store programs; specifically, the program may include program code, which includes computer operation instructions. The memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0040] Example 4 A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of a method for determining chemical cleaning parameters for a nuclear power plant steam generator. For example, the method includes: constructing a geometric model of the steam generator; based on the geometric model, constructing a calculation model of the internal flow field of the heat transfer tubes of the steam generator at different temperatures and flow rates; determining the flow rate range for chemical cleaning based on the calculation model; conducting dynamic chemical cleaning experiments in a laboratory based on the flow rate range to determine the temperature, chemical concentration, cleaning flow rate, and material corrosion data for chemical cleaning; calculating the total water volume of the chemical cleaning system according to the flow rate range; selecting equipment based on the cleaning flow rate; and determining the quantity of chemicals based on the chemical concentration and the total water volume. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0041] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0042] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0043] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0044] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0045] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0046] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for determining chemical cleaning parameters of a steam generator in a nuclear power plant, characterized in that, include: A geometric model of a steam generator is constructed, and based on the geometric model of the steam generator, a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates is constructed. Based on the calculation model, the flow rate range for chemical cleaning is determined; Based on the flow range of the chemical cleaning, dynamic chemical cleaning experiments were conducted in the laboratory to determine the temperature, chemical concentration, cleaning flow rate, and material corrosion data of the chemical cleaning. Calculate the total water volume of the chemical cleaning system based on the flow rate range of the chemical cleaning process. Equipment selection is based on the cleaning flow rate; the quantity of medicine is determined based on the drug concentration and the total water volume.

2. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, The process of constructing a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates based on the geometric model of the steam generator is as follows: The physical equations and boundary conditions for the feedwater are set, and a numerical model of the feedwater side flow field is established based on the geometric model of the steam generator. Based on the established numerical model of the feedwater side flow field, a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates is constructed.

3. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, The process of determining the flow range for chemical cleaning based on the aforementioned calculation model is as follows: The calculation model was analyzed, and a range was selected in which the internal flow field of the steam generator was uniformly distributed, the average flow velocity of all heat transfer tubes met the standard requirement of 0.5-1m / s, and there were no dead zones, blind zones, or areas where the flow velocity was greater than the preset flow velocity. The total flow rate corresponding to this flow velocity was used as the initial flow range.

4. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, The chemicals that need to be added include the main cleaning agent, corrosion inhibitor, solvent, reducing agent, and pH adjuster.

5. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, Also includes: During the chemical cleaning process, the system flow rate of the chemical cleaning system is adjusted according to the calculated reference flow rate to ensure that the deviation between the two does not exceed 10%. Add the appropriate amount of chemical cleaning agent according to the calculated quantity of the agent.

6. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, Also includes: After the chemical cleaning agent is added to the system, a sample is taken to analyze the agent concentration, and then compared with the determined agent concentration to verify the rationality of the total water volume.

7. The method for determining chemical cleaning parameters of a nuclear power plant steam generator according to claim 1, characterized in that, Also includes: After the chemical cleaning is completed, the corrosion data of the samples hanging in the chemical cleaning system and the laboratory samples are compared to verify the rationality of the calculation model. If the total corrosion amount and corrosion rate of the samples in the chemical cleaning system and the laboratory samples do not differ by more than 20%, then the selection of chemical cleaning flow rate and chemical concentration is considered reasonable.

8. A system for determining chemical cleaning parameters of a nuclear power plant steam generator, characterized in that, include: The construction module is used to construct the geometric model of the steam generator, and based on the geometric model of the steam generator, to construct a calculation model of the internal flow field of the heat transfer tube of the steam generator under different temperatures and flow rates. The first determining module is used to determine the flow range of chemical cleaning based on the calculation model; The second determining module is used to conduct dynamic chemical cleaning experiments in the laboratory based on the flow range of the chemical cleaning to determine the temperature, chemical concentration, cleaning flow rate and material corrosion data of the chemical cleaning. The calculation module is used to calculate the total water volume of the chemical cleaning system based on the flow range of the chemical cleaning process. The third determining module is used to select equipment based on the cleaning flow rate and to determine the quantity of medicine based on the drug concentration and the total water volume.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for determining chemical cleaning parameters of a nuclear power plant steam generator as described in any one of claims 1-7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for determining chemical cleaning parameters of a nuclear power plant steam generator as described in any one of claims 1-7.

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