Method of controlling a nuclear reactor

Abstract

The embodiment of the present application provides a kind of control method of nuclear reactor, belong to nuclear power technical field.The method comprises: obtaining the operation mode of reactor;Determine the control logic corresponding to the operation mode based on the operation mode;The multiple valves in the chemical and volume system are controlled by the control logic, to control the reactor.This embodiment of the present application can improve the efficiency when the coolant of reactor is charged and discharged.

Description

Technical Field

[0001] This application relates to the field of nuclear power technology, and in particular to a method for controlling a nuclear reactor. Background Technology

[0002] In existing nuclear power plant technologies, the chemical and volumetric system, as a major auxiliary system, plays an indispensable role in all stages of unit operation. The main functions of this system include controlling the amount of coolant water loaded into the reactor and controlling water chemistry to ensure the safe and efficient operation of the reactor.

[0003] When using the chemical and volumetric systems to charge and discharge coolant in a reactor and to discharge coolant at low pressure, operators often need to manually check the status of each valve. However, this manual check prolongs the operation time and significantly affects the efficiency of charging and discharging coolant in reactors. Summary of the Invention

[0004] The main objective of this application is to propose a control method for nuclear reactors, which aims to solve the problem of low efficiency in existing methods for charging and discharging coolant in reactors.

[0005] To achieve the above objectives, a first aspect of this application provides a method for controlling a nuclear reactor, the method comprising:

[0006] Obtain the reactor's operating mode;

[0007] Based on the operating mode, determine the control logic corresponding to the operating mode;

[0008] The control logic controls multiple valves in the chemical and volumetric system to control the reactor.

[0009] In some implementations, the control logic includes at least one of the following:

[0010] The coolant discharge path of the reactor is isolated;

[0011] The coolant in the reactor is discharged;

[0012] Add coolant to the reactor;

[0013] The coolant replenishment path of the reactor is isolated.

[0014] In some implementations, the control logic includes M execution conditions ordered in sequence, where M is a positive integer;

[0015] The control logic controls multiple valves in the chemical and volumetric system, including:

[0016] The execution condition that is ranked first among the M execution conditions is taken as the current execution condition;

[0017] Based on the current execution conditions, generate the control signal corresponding to the current execution conditions;

[0018] Based on the control signal corresponding to the current execution condition, the valves involved in the current execution condition in the chemical and volumetric system are controlled;

[0019] If the control of the valve involved in the current execution condition is completed, and if there is a next execution condition among the M execution conditions, then the next execution condition of the current execution condition is obtained.

[0020] The next execution condition is taken as the current execution condition, and the process jumps to the step of generating the control signal corresponding to the current execution condition based on the current execution condition.

[0021] In some embodiments, the control logic includes isolating the coolant discharge path of the reactor. The control logic includes a first execution condition, a second execution condition, and a third execution condition in sequence. The first execution condition includes at least one of the following: the primary loop radioactivity dose of the reactor is higher than a first threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold, and the chemical and volumetric system receives a safety isolation signal.

[0022] The control signal corresponding to the first execution condition is used to instruct the closure of the first containment isolation valve of the chemical and volumetric system;

[0023] The second execution condition includes at least one of the following: the discharge isolation valve of the chemical and volumetric system is not fully open; the water level of the primary circuit pressurizer of the reactor is lower than the third threshold; the chemical and volumetric system receives a charging isolation signal; the charging pipeline pressure of the chemical and volumetric system is lower than the fourth threshold; the liquid level of the control tank reaches the second threshold; and the chemical and volumetric system receives a safety injection signal.

[0024] The control signal corresponding to the second execution condition is used to instruct the closure of the orifice isolation valve of the chemical and volumetric system;

[0025] The third execution condition includes at least one of the following: the water level of the primary circuit regulator is lower than the third threshold, the discharge temperature of the chemical and volumetric system is not higher than the fifth threshold, the liquid level of the control tank reaches the second threshold, and the chemical and volumetric system receives a safety injection signal.

[0026] The control signal corresponding to the third execution condition is used to instruct the closure of the drain isolation valve of the chemical and volumetric system.

[0027] In some embodiments, the control logic includes discharging coolant from the reactor. The control logic includes a fourth execution condition, a fifth execution condition, and a sixth execution condition in sequence. The fourth execution condition includes the following: the pressure relief valve of the chemical and volumetric system is open; there is no radioactive material in the primary loop of the reactor; and the chemical and volumetric system receives a first signal indicating that the coolant from the reactor should be discharged.

[0028] The control signal corresponding to the fourth execution condition is used to instruct the opening of the first safety isolation valve of the chemical and volumetric system;

[0029] The fifth execution condition includes that the downflow temperature of the chemical and volumetric system is not higher than the fifth threshold and that the downflow orifice plate isolation valve of the chemical and volumetric system is in the closed state;

[0030] The control signal corresponding to the fifth execution condition is used to instruct the opening of the drain isolation valve of the chemical and volumetric system;

[0031] The sixth execution condition includes the chemical and volumetric system not receiving a charging isolation signal, the primary circuit pressurizer water level of the reactor not being lower than the third threshold, and the charging pipeline pressure of the chemical and volumetric system not being lower than the fourth threshold.

[0032] The control signal corresponding to the sixth execution condition is used to instruct the opening of the orifice isolation valve of the chemical and volumetric system.

[0033] In some embodiments, the control logic includes replenishing coolant into the reactor, and the control logic includes a seventh execution condition and an eighth execution condition ordered sequentially, wherein the seventh execution condition includes the chemical and volumetric system receiving a second signal indicating that coolant should be replenished into the reactor;

[0034] The control signal corresponding to the seventh execution condition is used to instruct the opening of the downstream isolation valve of the capacity control box of the chemical and volume system, the second containment isolation valve of the chemical and volume system, and the charge isolation valve of the chemical and volume system;

[0035] The eighth execution condition includes the downstream isolation valve of the control box being in the open state, the second containment isolation valve being in the open state, and the charging isolation valve being in the open state;

[0036] The control signal corresponding to the eighth execution condition is used to instruct the charging pump of the chemical and volumetric system to be turned on.

[0037] In some embodiments, the control logic includes isolating the coolant replenishment path of the reactor. The control logic includes a ninth execution condition, a tenth execution condition, an eleventh execution condition, and a twelfth execution condition in sequence. The ninth execution condition includes the chemical and volumetric system receiving a third signal and the liquid level in the capacity control tank of the chemical and volumetric system reaching a second threshold. The third signal indicates that the coolant replenishment path of the reactor should be isolated.

[0038] The control signal corresponding to the ninth execution condition is used to instruct the closure of the downstream isolation valve of the capacity control box of the chemical and volumetric system.

[0039] The tenth execution condition includes at least one of the following: the chemical and volumetric system receiving an injection signal, or the chemical and volumetric system receiving a containment isolation signal.

[0040] The control signal corresponding to the tenth execution condition is used to instruct the closure of the second containment isolation valve of the chemical and volumetric system;

[0041] The eleventh execution condition includes at least one of the following: the primary circuit pressurizer water level of the reactor is higher than the sixth threshold, and the chemical and volumetric system receives a safety injection signal.

[0042] The control signal corresponding to the eleventh execution condition is used to instruct the closure of the charge isolation valve of the chemical and volumetric system;

[0043] The twelfth execution condition includes at least one of the following: the chemical and volumetric system receives a stop signal from the charging pump; the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold; the inlet pressure of the charging pump of the chemical and volumetric system is lower than a seventh threshold; and the outlet pressure of the charging pump of the chemical and volumetric system is higher than an eighth threshold.

[0044] The control signal corresponding to the twelfth execution condition is used to instruct the charging pump of the chemical and volumetric system to be shut down.

[0045] To achieve the above objectives, a second aspect of this application provides a control device for a nuclear reactor, the device comprising:

[0046] The mode acquisition module is used to acquire the reactor's operating mode;

[0047] The logic determination module is used to determine the control logic corresponding to the operating mode based on the operating mode.

[0048] A valve control module is used to control multiple valves in the chemical and volumetric system through the control logic, thereby controlling the reactor.

[0049] To achieve the above objectives, a third aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the nuclear reactor control method described in the first aspect.

[0050] To achieve the above objectives, a fourth aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the nuclear reactor control method described in the first aspect.

[0051] This application proposes a control method for a nuclear reactor. By acquiring the reactor's operating mode, determining the corresponding control logic for the chemical and volumetric systems under that operating mode, and automatically controlling multiple valves in the chemical and volumetric systems through the control logic, the method automates the charging and discharging of coolant in the reactor. This improves the efficiency of the charging and discharging of coolant in the reactor. Attached Figure Description

[0052] Figure 1 This is a schematic flowchart of the nuclear reactor control method provided in the embodiments of this application;

[0053] Figure 2 yes Figure 1 A flowchart illustrating step S103 in the process;

[0054] Figure 3 This is a schematic diagram of the structure of the control device for a nuclear reactor provided in an embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0056] 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.

[0057] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0059] In existing nuclear power plant technologies, the chemical and volumetric system, as a major auxiliary system, plays an indispensable role in all stages of unit operation. The main functions of this system include controlling the amount of coolant water loaded into the reactor and controlling water chemistry to ensure the safe and efficient operation of the reactor.

[0060] When using the chemical and volumetric systems to charge and discharge coolant in a reactor and to discharge coolant at low pressure, operators often need to manually check the status of each valve. However, this manual check prolongs the operation time and significantly affects the efficiency of charging and discharging coolant in reactors.

[0061] Based on this, the present application provides a control method for a nuclear reactor, which aims to solve the problem of low efficiency in existing methods for charging and discharging coolant in reactors.

[0062] The nuclear reactor control method provided in this application is specifically illustrated through the following embodiments. First, the nuclear reactor control method in this application embodiment is described.

[0063] The embodiments of this application can acquire and process relevant data based on artificial intelligence technology. Artificial intelligence (AI) refers to the theories, methods, technologies, and application systems that use digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use that knowledge to obtain optimal results.

[0064] Foundational technologies for artificial intelligence generally include sensors, dedicated AI chips, cloud computing, distributed storage, big data processing, operating / interactive systems, and mechatronics. AI software technologies mainly encompass computer vision, robotics, biometrics, speech processing, natural language processing, and machine learning / deep learning.

[0065] The nuclear reactor control method provided in this application relates to the field of artificial intelligence. This nuclear reactor control method can be applied to a terminal, a server, or software running on either a terminal or a server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, etc.; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application implementing the nuclear reactor control method, but is not limited to the above forms.

[0066] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0067] It should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent is obtained first. Furthermore, the collection, use, and processing of this data comply with relevant laws, regulations, and standards. In addition, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user is obtained through pop-ups or redirection to confirmation pages. Only after obtaining the user's separate permission or consent is the necessary user-related data required for the proper functioning of these embodiments acquired.

[0068] Figure 1 This is a flowchart illustrating the control method for a nuclear reactor provided in an embodiment of this application. Please refer to [link / reference]. Figure 1The nuclear reactor control method provided in this application embodiment may include, but is not limited to, steps S101 to S103.

[0069] Step S101: Obtain the reactor's operating mode.

[0070] In this step, the reactor's operating mode is identified through pre-set sensors and the reactor's monitoring system. The reactor's operating modes include, but are not limited to, cold shutdown mode, hot shutdown mode, emergency shutdown, reactor refueling overhaul, triggered discharge isolation condition, reactor loading, primary loop water filling mode, and primary loop queuing mode.

[0071] Step S102: Based on the operating mode, determine the control logic corresponding to the operating mode.

[0072] In this step, based on the reactor's operating mode, the required chemical and volumetric system control functions for the nuclear reactor, as well as the corresponding control logic, are determined. The control functions include isolating the reactor coolant discharge path (i.e., the discharge path), activating the reactor coolant discharge, activating the reactor coolant charging, and isolating the reactor coolant charging path (i.e., the replenishment path). The control logic includes isolating the reactor coolant discharge path, discharging the reactor coolant, replenishing the reactor coolant, and isolating the reactor coolant replenishment path.

[0073] For example, when the reactor is undergoing a refueling overhaul or when the reactor triggers an isolation condition, in order to prevent coolant leakage and prevent radioactive materials from entering the coolant, the chemistry and volume system will isolate the coolant discharge path of the reactor.

[0074] Step S103: Control the multiple valves in the chemical and volumetric system through the control logic to control the reactor.

[0075] In this step, the chemical and volumetric system includes multiple valves. According to the control logic corresponding to different operating modes of the reactor, the opening or closing of the corresponding multiple valves in the chemical and volumetric system is controlled to complete the functions required by the reactor.

[0076] Specifically, the chemical and volumetric system includes a path for draining reactor coolant and a path for charging reactor coolant. The drain path includes a first containment isolation valve, a drain orifice plate isolation valve, and a drain isolation valve arranged in sequence. The charging path includes a downstream isolation valve of the containment control tank, a second containment isolation valve, a charging isolation valve, and a charging pump arranged in sequence. It should be noted that the above valves are a collective term for valves of the same function, and each type of valve includes one or more electrically operated valves.

[0077] For example, the first containment isolation valve, the drain orifice plate isolation valve, and the drain isolation valve in the chemical and volumetric system are closed sequentially according to the control logic to isolate the drain path of the reactor coolant.

[0078] Through steps S101 to S103, the chemical and volumetric system acquires the reactor's operating mode, determines the corresponding control logic for the chemical and volumetric system under that operating mode, and automatically controls multiple valves in the chemical and volumetric system through the control logic to automate the charging and discharging of the reactor coolant. This improves the efficiency of the charging and discharging of the reactor coolant.

[0079] In some implementations, the control logic includes M execution conditions ordered sequentially, where M is a positive integer, such as... Figure 2 As shown, in step S103, the control logic controls multiple valves in the chemical and volumetric system to control the reactor, which may include, but is not limited to, the following steps.

[0080] Step S1031: Select the execution condition that is ranked first among the M execution conditions as the current execution condition.

[0081] Step S1032: Generate a control signal corresponding to the current execution condition based on the current execution condition.

[0082] Step S1033: Control the valves involved in the current execution conditions in the chemical and volumetric system according to the control signal corresponding to the current execution conditions.

[0083] Step S1034: If the control of the valve involved in the current execution condition is completed, and if there is a next execution condition for the current execution condition among the M execution conditions, then obtain the next execution condition for the current execution condition.

[0084] Step S1035: Take the next execution condition as the current execution condition, and jump to the step of generating the control signal corresponding to the current execution condition based on the current execution condition.

[0085] In this implementation, the control logic of the chemical and volumetric system is first determined. The control logic is preset according to the reactor's operating mode, and the sequence of valve closure is set according to the actual situation.

[0086] It should be noted that the completion of control over the valve involved in the current execution conditions requires successful control of the valve involved in the current execution conditions. If only a signal is issued but not executed or the control fails, it does not constitute the completion of control.

[0087] Specifically, each control logic controls a total of M valves arranged sequentially in the chemical and volumetric system. These M valves correspond to M execution conditions. When a current execution condition is met, a control signal corresponding to that condition is generated, indicating whether the valve involved in the current execution condition is opened or closed. Once the control of the valve involved in the current execution condition is completed, the next execution condition is used as the current execution condition, and the above steps are repeated until all M execution conditions are completed. For example, with three execution conditions, if the first execution condition is met, a first control signal is generated, controlling the valve corresponding to the first signal. If the valve corresponding to the first signal is successfully controlled, and the second execution condition is met, a second control signal is generated based on the second execution condition, controlling the valve corresponding to the second signal. If the valve corresponding to the second signal is successfully controlled, and the third execution condition is met, a third control signal is generated based on the third execution condition, controlling the valve corresponding to the third signal.

[0088] For example, when isolating the coolant discharge path of the reactor, technicians typically manually close the first containment isolation valve, the orifice plate isolation valve, and the discharge isolation valve in sequence. In this implementation, a first execution condition, a second execution condition, and a third execution condition for the automatic closure of the valves are pre-set according to the order of manual operation. When the first execution condition is met, a first control signal is issued to close the first containment isolation valve. If the second execution condition is met when the first containment isolation valve is closed, a second control signal is issued to close the orifice plate isolation valve. If the third execution condition is met when the orifice plate isolation valve is closed, a third control signal is issued to close the discharge isolation valve.

[0089] In another implementation, a breakpoint is set after each control logic is completed to prevent the next function from starting automatically without meeting the conditions. This ensures that the functions are executed in the preset order and also makes it easier to pause the system operation by breaking point when the reactor system needs to be debugged or maintained, so as to locate and solve problems.

[0090] In this embodiment, the opening or closing of multiple valves in the chemical and volumetric system is controlled by control logic, ensuring the sequence and correctness of the operation, realizing automated control of the valves in the chemical and volumetric system, and greatly improving the efficiency and accuracy of the charging and discharging operation of the reactor coolant.

[0091] In some implementations, the control logic includes isolating the coolant discharge path of the reactor. The control logic includes a first execution condition, a second execution condition, and a third execution condition in sequence. The first execution condition includes at least one of the following: the primary loop radioactivity dose of the reactor is higher than a first threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold, and the chemical and volumetric system receives a safety isolation signal.

[0092] The control signal corresponding to the first execution condition is used to instruct the closure of the first containment isolation valve of the chemical and volumetric system.

[0093] The second execution condition includes at least one of the following: the discharge isolation valve of the chemical and volumetric system is not fully open; the water level of the primary circuit pressurizer of the reactor is lower than the third threshold; the chemical and volumetric system receives a charging isolation signal; the charging pipeline pressure of the chemical and volumetric system is lower than the fourth threshold; the liquid level of the control tank reaches the second threshold; and the chemical and volumetric system receives a safety injection signal.

[0094] The control signal corresponding to the second execution condition is used to instruct the closure of the orifice isolation valve of the chemical and volumetric system.

[0095] The third execution condition includes at least one of the following: the water level of the primary circuit regulator is lower than the third threshold, the discharge temperature of the chemical and volumetric system is not higher than the fifth threshold, the liquid level of the control tank reaches the second threshold, and the chemical and volumetric system receives a safety injection signal.

[0096] The control signal corresponding to the third execution condition is used to instruct the closure of the drain isolation valve of the chemical and volumetric system.

[0097] During safe injection and residual heat removal system operation, reactor refueling overhaul, or when a coolant discharge isolation condition is triggered, the chemical and volumetric system must perform the reactor coolant discharge isolation function (i.e., isolate the reactor coolant discharge path).

[0098] Specifically, under at least one of the following conditions, the primary circuit radioactive dose of the reactor is higher than a first threshold, the liquid level in the containment tank of the chemical and volumetric system reaches a second threshold, or the chemical and volumetric system receives a safety isolation signal, the control logic generates a first signal, which instructs the closure of the first containment isolation valve of the chemical and volumetric system.

[0099] When the first containment isolation valve is closed, if at least one of the following occurs: the discharge isolation valve of the chemical and volumetric system is not fully open, the pressurizer level of the reactor primary loop is below the third threshold, the chemical and volumetric system receives a charging isolation signal, the charging pipeline pressure of the chemical and volumetric system is below the fourth threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches the second threshold, or the chemical and volumetric system receives a safety injection signal, the control logic generates a second signal, which instructs the closure of the discharge orifice plate isolation valve of the chemical and volumetric system.

[0100] When the drain orifice plate isolation valve is closed, if at least one of the following occurs: the pressurizer level of the reactor primary loop is lower than the third threshold, the drain flow temperature of the chemical and volumetric system is not higher than the fifth threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches the second threshold, or the chemical and volumetric system receives a safety injection signal, the control logic generates a third signal. The third signal indicates that the drain isolation valve of the chemical and volumetric system should be closed.

[0101] It should be noted that the first, second, third, fourth, and fifth thresholds can all be set according to the actual situation. The safety isolation signal and the safety injection signal are issued by the reactor's protection system.

[0102] In this implementation, by setting execution conditions in stages, the automated operation of isolating the coolant discharge path of the reactor can be realized, thereby improving the efficiency and accuracy of the coolant discharge isolation operation.

[0103] In some implementations, the control logic includes discharging coolant from the reactor. The control logic includes a fourth execution condition, a fifth execution condition, and a sixth execution condition in sequence. The fourth execution condition includes the following: the pressure relief valve of the chemical and volumetric system is open; there is no radioactive material in the primary loop of the reactor; and the chemical and volumetric system receives a first signal indicating that the coolant from the reactor should be discharged.

[0104] The control signal corresponding to the fourth execution condition is used to instruct the opening of the first safety isolation valve of the chemical and volumetric system.

[0105] The fifth execution condition includes that the downflow temperature of the chemical and volumetric system is not higher than the fifth threshold and that the downflow orifice plate isolation valve of the chemical and volumetric system is in the closed state.

[0106] The control signal corresponding to the fifth execution condition is used to instruct the opening of the drain isolation valve of the chemical and volumetric system.

[0107] The sixth execution condition includes the chemical and volumetric system not receiving a charging isolation signal, the primary circuit pressurizer water level of the reactor not being lower than the third threshold, and the charging pipeline pressure of the chemical and volumetric system not being lower than the fourth threshold.

[0108] The control signal corresponding to the sixth execution condition is used to instruct the opening of the orifice isolation valve of the chemical and volumetric system.

[0109] After the safe injection and residual heat removal system is deactivated, the chemical and volumetric system needs to perform the reactor coolant discharge operation (that is, to discharge the reactor coolant).

[0110] Specifically, when the pressure relief regulating valve of the chemical and volumetric system is open, there is no radioactive material in the primary loop, and the chemical and volumetric system receives a first signal instructing the reactor coolant to be discharged, the control logic generates a fourth signal. The fourth signal instructs the opening of the first safety isolation valve of the chemical and volumetric system. The first signal is a signal manually issued by a technician.

[0111] If the chemical and volumetric system does not receive a signal indicating excessively high discharge temperature and the discharge orifice isolation valve of the chemical and volumetric system is closed when the first safety isolation valve is open, the control logic generates a fifth signal, which instructs the discharge isolation valve of the chemical and volumetric system to be opened.

[0112] If the first safety isolation valve is open, the drain isolation valve is open, and the drain flow temperature of the chemical and volumetric system is not higher than the fifth threshold, and if the pressurizer level of the reactor primary loop is not lower than the third threshold and the charging line pressure of the chemical and volumetric system is not lower than the fourth threshold, then the control logic generates a sixth signal. The sixth signal indicates that the drain orifice isolation valve of the chemical and volumetric system should be opened.

[0113] In this implementation, by setting execution conditions in stages, the operation of discharging coolant from the reactor can be automated, thereby improving the efficiency and accuracy of the coolant discharge and commissioning operation.

[0114] In some implementations, the control logic includes replenishing coolant into the reactor, and the control logic includes a seventh execution condition and an eighth execution condition ordered sequentially, wherein the seventh execution condition includes the chemical and volumetric system receiving a second signal indicating that coolant should be replenished into the reactor.

[0115] The control signal corresponding to the seventh execution condition is used to instruct the opening of the downstream isolation valve of the chemical and volumetric system's containment tank, the second containment isolation valve of the chemical and volumetric system, and the charge isolation valve of the chemical and volumetric system.

[0116] The eighth execution condition includes the downstream isolation valve of the control box being in the open state, the second containment isolation valve being in the open state, and the charging isolation valve being in the open state.

[0117] The control signal corresponding to the eighth execution condition is used to instruct the charging pump of the chemical and volumetric system to be turned on.

[0118] During reactor loading, from the start of primary coolant charging, during reactor maintenance cold shutdown, and during primary coolant draining via the chemical and volumetric system, the chemical and volumetric system must be operated to perform the function of replenishing reactor coolant (i.e., supplementing reactor coolant).

[0119] Specifically, when the chemistry and volumetric system receives a second signal instructing the replenishment of coolant to the reactor, the control logic generates a seventh signal. The seventh signal instructs the opening of the downstream isolation valve of the chemistry and volumetric system's containment control tank, the second containment isolation valve of the chemistry and volumetric system, and the charge isolation valve of the chemistry and volumetric system. The second signal is a signal manually issued by a technician.

[0120] With the downstream isolation valve, the second containment isolation valve, and the charge isolation valve of the control box all open, the control logic generates an eighth signal, which instructs the charge pump of the chemical and volumetric system to be turned on.

[0121] In this implementation, by setting execution conditions in stages, the operation of replenishing the reactor coolant can be automated, thereby improving the efficiency and accuracy of the coolant charging and commissioning operation.

[0122] In some implementations, the control logic includes isolating the coolant replenishment path of the reactor. The control logic includes a ninth execution condition, a tenth execution condition, an eleventh execution condition, and a twelfth execution condition in sequence. The ninth execution condition includes the chemical and volumetric system receiving a third signal and the liquid level in the capacity control tank of the chemical and volumetric system reaching a second threshold. The third signal indicates that the coolant replenishment path of the reactor should be isolated.

[0123] The control signal corresponding to the ninth execution condition is used to instruct the closure of the downstream isolation valve of the capacity control box of the chemical and volumetric system.

[0124] The tenth execution condition includes at least one of the following: the chemical and volumetric system receiving an injection signal or the chemical and volumetric system receiving a containment isolation signal.

[0125] The control signal corresponding to the tenth execution condition is used to instruct the closure of the second containment isolation valve of the chemical and volumetric system.

[0126] The eleventh execution condition includes at least one of the following: the primary circuit pressurizer water level of the reactor is higher than the sixth threshold, or the chemical and volumetric system receives a safety injection signal.

[0127] The control signal corresponding to the eleventh execution condition is used to instruct the closure of the charge isolation valve of the chemical and volumetric system.

[0128] The twelfth execution condition includes at least one of the following: the chemical and volumetric system receives a stop signal from the charging pump; the liquid level in the volumetric control tank of the chemical and volumetric system reaches a second threshold; the inlet pressure of the charging pump of the chemical and volumetric system is lower than a seventh threshold; and the outlet pressure of the charging pump of the chemical and volumetric system is higher than an eighth threshold.

[0129] The control signal corresponding to the twelfth execution condition is used to instruct the charging pump of the chemical and volumetric system to be shut down.

[0130] Specifically, when the chemical and volumetric system receives a third signal instructing the reactor coolant replenishment path to be isolated and the liquid level in the chemical and volumetric system's control tank reaches a second threshold, the control logic generates a ninth signal. The ninth signal instructs the closure of the downstream isolation valve of the chemical and volumetric system's control tank. The third signal is a signal manually issued by a technician.

[0131] If the chemical and volumetric system receives a safety injection signal and / or a containment isolation signal when the downstream isolation valve of the containment tank is closed, the control logic generates a tenth signal, which instructs the second containment isolation valve of the chemical and volumetric system to be closed.

[0132] If the primary circuit pressure regulator level exceeds the sixth threshold and / or the chemical and volumetric system receives a safety injection signal when the second containment isolation valve is closed, the control logic generates an eleventh signal, which instructs the chemical and volumetric system to close the charging isolation valve.

[0133] When the charging isolation valve is closed, if at least one of the following occurs: the chemical and volumetric system receives a charging pump shutdown signal, the liquid level in the control tank reaches the first threshold, the inlet pressure of the charging pump in the chemical and volumetric system is lower than the seventh threshold, or the outlet pressure of the charging pump in the chemical and volumetric system is higher than the eighth threshold, the control logic generates a twelfth signal, which indicates that the charging pump of the chemical and volumetric system should be shut down.

[0134] It should be noted that the sixth, seventh, and eighth thresholds can all be set according to the actual situation.

[0135] In this implementation, by setting execution conditions in stages, the automated operation of isolating the coolant replenishment path of the reactor can be realized, thereby improving the efficiency and accuracy of the coolant replenishment isolation operation.

[0136] Figure 3 This is a schematic diagram of the structure of the control device for a nuclear reactor provided in an embodiment of this application. Please refer to [link / reference]. Figure 3 This application also provides a nuclear reactor control device 800, which can implement the above-described nuclear reactor control method. The nuclear reactor control device 800 includes:

[0137] The mode acquisition module 801 is used to acquire the reactor's operating mode;

[0138] The logic determination module 802 is used to determine the control logic corresponding to the operating mode based on the operating mode.

[0139] The valve control module 803 is used to control multiple valves in the chemical and volumetric system through the control logic in order to control the reactor.

[0140] In some implementations, the control logic includes at least one of the following:

[0141] The coolant discharge path of the reactor is isolated;

[0142] The coolant in the reactor is discharged;

[0143] Add coolant to the reactor;

[0144] The coolant replenishment path of the reactor is isolated.

[0145] In some implementations, the control logic includes M execution conditions ordered in sequence, where M is a positive integer;

[0146] Valve control module 803 includes:

[0147] The current execution condition determination submodule is used to select the execution condition that is ranked first among the M execution conditions as the current execution condition;

[0148] A control signal generation submodule is used to generate a control signal corresponding to the current execution condition based on the current execution condition.

[0149] The valve control submodule is used to control the valves involved in the current execution conditions in the chemical and volumetric system according to the control signal corresponding to the current execution conditions.

[0150] The execution condition acquisition submodule is used to acquire the next execution condition of the current execution condition if there is a next execution condition among the M execution conditions after the control of the valve involved in the current execution condition is completed.

[0151] The current execution condition reconfirmation submodule is used to take the next execution condition as the current execution condition and jump to the step of generating the control signal corresponding to the current execution condition based on the current execution condition.

[0152] In some embodiments, the control logic includes isolating the coolant discharge path of the reactor. The control logic includes a first execution condition, a second execution condition, and a third execution condition in sequence. The first execution condition includes at least one of the following: the primary loop radioactivity dose of the reactor is higher than a first threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold, and the chemical and volumetric system receives a safety isolation signal.

[0153] The control signal corresponding to the first execution condition is used to instruct the closure of the first containment isolation valve of the chemical and volumetric system;

[0154] The second execution condition includes at least one of the following: the discharge isolation valve of the chemical and volumetric system is not fully open; the water level of the primary circuit pressurizer of the reactor is lower than the third threshold; the chemical and volumetric system receives a charging isolation signal; the charging pipeline pressure of the chemical and volumetric system is lower than the fourth threshold; the liquid level of the control tank reaches the second threshold; and the chemical and volumetric system receives a safety injection signal.

[0155] The control signal corresponding to the second execution condition is used to instruct the closure of the orifice isolation valve of the chemical and volumetric system;

[0156] The third execution condition includes at least one of the following: the water level of the primary circuit regulator is lower than the third threshold, the discharge temperature of the chemical and volumetric system is not higher than the fifth threshold, the liquid level of the control tank reaches the second threshold, and the chemical and volumetric system receives a safety injection signal.

[0157] The control signal corresponding to the third execution condition is used to instruct the closure of the drain isolation valve of the chemical and volumetric system.

[0158] In some embodiments, the control logic includes discharging coolant from the reactor. The control logic includes a fourth execution condition, a fifth execution condition, and a sixth execution condition in sequence. The fourth execution condition includes the following: the pressure relief valve of the chemical and volumetric system is open; there is no radioactive material in the primary loop of the reactor; and the chemical and volumetric system receives a first signal indicating that the coolant from the reactor should be discharged.

[0159] The control signal corresponding to the fourth execution condition is used to instruct the opening of the first safety isolation valve of the chemical and volumetric system;

[0160] The fifth execution condition includes that the downflow temperature of the chemical and volumetric system is not higher than the fifth threshold and that the downflow orifice plate isolation valve of the chemical and volumetric system is in the closed state;

[0161] The control signal corresponding to the fifth execution condition is used to instruct the opening of the drain isolation valve of the chemical and volumetric system;

[0162] The sixth execution condition includes the chemical and volumetric system not receiving a charging isolation signal, the primary circuit pressurizer water level of the reactor not being lower than the third threshold, and the charging pipeline pressure of the chemical and volumetric system not being lower than the fourth threshold.

[0163] The control signal corresponding to the sixth execution condition is used to instruct the opening of the orifice isolation valve of the chemical and volumetric system.

[0164] In some embodiments, the control logic includes replenishing coolant into the reactor, and the control logic includes a seventh execution condition and an eighth execution condition ordered sequentially, wherein the seventh execution condition includes the chemical and volumetric system receiving a second signal indicating that coolant should be replenished into the reactor;

[0165] The control signal corresponding to the seventh execution condition is used to instruct the opening of the downstream isolation valve of the capacity control box of the chemical and volume system, the second containment isolation valve of the chemical and volume system, and the charge isolation valve of the chemical and volume system;

[0166] The eighth execution condition includes the downstream isolation valve of the control box being in the open state, the second containment isolation valve being in the open state, and the charging isolation valve being in the open state;

[0167] The control signal corresponding to the eighth execution condition is used to instruct the charging pump of the chemical and volumetric system to be turned on.

[0168] In some embodiments, the control logic includes isolating the coolant replenishment path of the reactor. The control logic includes a ninth execution condition, a tenth execution condition, an eleventh execution condition, and a twelfth execution condition in sequence. The ninth execution condition includes the chemical and volumetric system receiving a third signal and the liquid level in the capacity control tank of the chemical and volumetric system reaching a second threshold. The third signal indicates that the coolant replenishment path of the reactor should be isolated.

[0169] The control signal corresponding to the ninth execution condition is used to instruct the closure of the downstream isolation valve of the capacity control box of the chemical and volumetric system.

[0170] The tenth execution condition includes at least one of the following: the chemical and volumetric system receiving an injection signal, or the chemical and volumetric system receiving a containment isolation signal.

[0171] The control signal corresponding to the tenth execution condition is used to instruct the closure of the second containment isolation valve of the chemical and volumetric system;

[0172] The eleventh execution condition includes at least one of the following: the primary circuit pressurizer water level of the reactor is higher than the sixth threshold, and the chemical and volumetric system receives a safety injection signal.

[0173] The control signal corresponding to the eleventh execution condition is used to instruct the closure of the charge isolation valve of the chemical and volumetric system;

[0174] The twelfth execution condition includes at least one of the following: the chemical and volumetric system receives a stop signal from the charging pump; the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold; the inlet pressure of the charging pump of the chemical and volumetric system is lower than a seventh threshold; and the outlet pressure of the charging pump of the chemical and volumetric system is higher than an eighth threshold.

[0175] The control signal corresponding to the twelfth execution condition is used to instruct the charging pump of the chemical and volumetric system to be shut down.

[0176] The specific implementation of the control device 800 for the nuclear reactor is basically the same as the specific implementation of the control method for the nuclear reactor described above, and will not be repeated here.

[0177] When the chemical and volumetric system is started, the nuclear reactor control device 800 acquires the reactor's operating mode and determines the corresponding control logic for the chemical and volumetric system under that operating mode. The control logic automatically controls multiple valves in the chemical and volumetric system to automate the charging and discharging of the reactor coolant. This improves the efficiency of the charging and discharging of the reactor coolant.

[0178] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned nuclear reactor control method. This electronic device can be any smart terminal, including desktop computers, tablets, mobile phones, and in-vehicle computers.

[0179] Please see Figure 4 , Figure 4 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. The electronic device includes:

[0180] The processor 901 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0181] The memory 902 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 902 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 902 and is called and executed by the processor 901 to execute the nuclear reactor control method of the embodiments of this application.

[0182] The 903 input / output interface is used to implement information input and output.

[0183] The communication interface 904 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0184] Bus 905 transmits information between various components of the device (e.g., processor 901, memory 902, input / output interface 903, and communication interface 904);

[0185] The processor 901, memory 902, input / output interface 903, and communication interface 904 are connected to each other within the device via bus 905.

[0186] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described nuclear reactor control method.

[0187] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0188] The nuclear reactor control method provided in this application obtains the reactor's operating mode, determines the control logic corresponding to the chemical and volumetric systems under that operating mode, and automatically controls multiple valves in the chemical and volumetric systems through the control logic to automate the charging and discharging of the reactor coolant; thus, the efficiency of charging and discharging the reactor coolant can be improved.

[0189] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0190] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0191] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0192] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0193] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0194] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0195] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0196] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0197] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0198] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0199] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A control method for a nuclear reactor, applied to chemical and volumetric systems, characterized in that, The method includes: Obtain the reactor's operating mode; Based on the operating mode, determine the control logic corresponding to the operating mode; The control logic controls multiple valves in the chemical and volumetric system to control the reactor. The control logic also includes at least one of the following: The coolant discharge path of the reactor is isolated; The coolant in the reactor is discharged; Add coolant to the reactor; The coolant supply path to the reactor is isolated; The control logic includes M execution conditions ordered in sequence, where M is a positive integer; The control logic controls multiple valves in the chemical and volumetric system, including: The execution condition that is ranked first among the M execution conditions is taken as the current execution condition; Based on the current execution conditions, generate the control signal corresponding to the current execution conditions; Based on the control signal corresponding to the current execution condition, the valves involved in the current execution condition in the chemical and volumetric system are controlled; If the control of the valve involved in the current execution condition is completed, and if there is a next execution condition among the M execution conditions, then the next execution condition of the current execution condition is obtained. The next execution condition is taken as the current execution condition, and the process jumps to the step of generating the control signal corresponding to the current execution condition based on the current execution condition.

2. The method according to claim 1, characterized in that, The control logic includes isolating the coolant discharge path of the reactor. The control logic includes a first execution condition, a second execution condition, and a third execution condition in sequence. The first execution condition includes at least one of the following: the primary loop radioactive dose of the reactor is higher than a first threshold, the liquid level in the capacity control tank of the chemical and volumetric system reaches a second threshold, and the chemical and volumetric system receives a safety isolation signal. The control signal corresponding to the first execution condition is used to instruct the closure of the first containment isolation valve of the chemical and volumetric system; The second execution condition includes at least one of the following: the discharge isolation valve of the chemical and volumetric system is not fully open; the water level of the primary circuit pressurizer of the reactor is lower than the third threshold; the chemical and volumetric system receives a charging isolation signal; the charging pipeline pressure of the chemical and volumetric system is lower than the fourth threshold; the liquid level of the control tank reaches the second threshold; and the chemical and volumetric system receives a safety injection signal. The control signal corresponding to the second execution condition is used to instruct the closure of the orifice isolation valve of the chemical and volumetric system; The third execution condition includes at least one of the following: the water level of the primary circuit regulator is lower than the third threshold, the discharge temperature of the chemical and volumetric system is not higher than the fifth threshold, the liquid level of the control tank reaches the second threshold, and the chemical and volumetric system receives a safety injection signal. The control signal corresponding to the third execution condition is used to instruct the closure of the drain isolation valve of the chemical and volumetric system.

3. The method according to claim 1, characterized in that, The control logic includes discharging the coolant from the reactor. The control logic includes a fourth execution condition, a fifth execution condition, and a sixth execution condition in sequence. The fourth execution condition includes the following: the pressure relief valve of the chemical and volumetric system is open; there is no radioactive material in the primary loop of the reactor; and the chemical and volumetric system receives a first signal indicating that the coolant from the reactor should be discharged. The control signal corresponding to the fourth execution condition is used to instruct the opening of the first safety isolation valve of the chemical and volumetric system; The fifth execution condition includes that the downflow temperature of the chemical and volumetric system is not higher than the fifth threshold and that the downflow orifice plate isolation valve of the chemical and volumetric system is in the closed state; The control signal corresponding to the fifth execution condition is used to instruct the opening of the drain isolation valve of the chemical and volumetric system; The sixth execution condition includes the chemical and volumetric system not receiving a charging isolation signal, the primary circuit pressurizer water level of the reactor not being lower than the third threshold, and the charging pipeline pressure of the chemical and volumetric system not being lower than the fourth threshold. The control signal corresponding to the sixth execution condition is used to instruct the opening of the orifice isolation valve of the chemical and volumetric system.

4. The method according to claim 1, characterized in that, The control logic includes replenishing coolant into the reactor, and the control logic includes a seventh execution condition and an eighth execution condition ordered in sequence, wherein the seventh execution condition includes the chemical and volumetric system receiving a second signal, the second signal indicating that coolant should be replenished into the reactor; The control signal corresponding to the seventh execution condition is used to instruct the opening of the downstream isolation valve of the capacity control box of the chemical and volume system, the second containment isolation valve of the chemical and volume system, and the charge isolation valve of the chemical and volume system; The eighth execution condition includes the downstream isolation valve of the control box being in the open state, the second containment isolation valve being in the open state, and the charging isolation valve being in the open state; The control signal corresponding to the eighth execution condition is used to instruct the charging pump of the chemical and volumetric system to be turned on.

5. The method according to claim 1, characterized in that, The control logic includes isolating the coolant replenishment path of the reactor. The control logic includes a ninth execution condition, a tenth execution condition, an eleventh execution condition, and a twelfth execution condition in sequence. The ninth execution condition includes the chemical and volumetric system receiving a third signal and the liquid level in the capacity control tank of the chemical and volumetric system reaching a second threshold. The third signal indicates that the coolant replenishment path of the reactor should be isolated. The control signal corresponding to the ninth execution condition is used to instruct the closure of the downstream isolation valve of the capacity control box of the chemical and volumetric system. The tenth execution condition includes at least one of the following: the chemical and volumetric system receiving an injection signal, or the chemical and volumetric system receiving a containment isolation signal. The control signal corresponding to the tenth execution condition is used to instruct the closure of the second containment isolation valve of the chemical and volumetric system; The eleventh execution condition includes at least one of the following: the primary circuit pressurizer water level of the reactor is higher than the sixth threshold, and the chemical and volumetric system receives a safety injection signal. The control signal corresponding to the eleventh execution condition is used to instruct the closure of the charge isolation valve of the chemical and volumetric system; The twelfth execution condition includes at least one of the following: the chemical and volumetric system receives a stop signal from the charging pump; the liquid level in the volumetric control tank of the chemical and volumetric system reaches a second threshold; the inlet pressure of the charging pump of the chemical and volumetric system is lower than a seventh threshold; and the outlet pressure of the charging pump of the chemical and volumetric system is higher than an eighth threshold. The control signal corresponding to the twelfth execution condition is used to instruct the charging pump of the chemical and volumetric system to be shut down.

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