Method, device and equipment for controlling starting sequence of air-cooled micro reactor

Abstract

The invention provides an air-cooled micro reactor starting sequence control method, device and equipment, and relates to the technical field of air-cooled micro reactor starting. The method comprises the following steps: checking the air-cooled micro-reactor before starting according to a received starting signal until the checking is finished; relevant functions of the helium turbine are started until starting is completed; lifting the control rod to a critical rod position and lifting the power to a self-sustaining state after the control rod reaches a critical state; and sequentially increasing the power from the self-sustaining state to a low-power thermal state, an auxiliary power state and a full-power state. According to the method provided by the invention, the air-cooled micro-reactor is controlled to be quickly started according to the starting sequence of the air-cooled micro-reactor to reach the full power state, so that the quick starting of the air-cooled micro-reactor is realized, and the starting time is shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas-cooled micro reactor startup, and particularly relates to a gas-cooled micro reactor startup sequence control method, device and equipment. BACKGROUND

[0002] The gas-cooled micro reactor is widely concerned due to its stability, compactness and safety, and currently, there are many micro nuclear power devices using the gas cooling technology, such as a prismatic core, a direct circulation heat conduction mode and an indirect circulation heat conduction mode. The dynamic characteristics of different forms of micro nuclear power devices are different.

[0003] The prismatic reactor is mainly applied to remote mountainous areas and islands, and due to the complexity and variability of the application scene, the gas-cooled micro reactor power generation device is required to quickly provide power demand and shorten the startup and shutdown time. The process of nuclear power device startup and shutdown involves the coordinated action of multiple systems and multiple devices, and there are certain sequence operations, repeated operations and confirmation operations. Therefore, for the prismatic reactor, a startup sequence control method is needed to shorten the startup time. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the above-mentioned deficiencies existing in the prior art, and to provide a gas-cooled micro reactor startup sequence control method, device and equipment. The use of the gas-cooled micro reactor startup sequence control method can shorten the startup time of the gas-cooled micro reactor.

[0005] In a first aspect, the embodiments of the present application provide a gas-cooled micro reactor startup sequence control method, comprising: performing pre-startup inspection on the gas-cooled micro reactor according to the received startup signal until the inspection is completed; starting the helium turbine related functions until the startup is completed; lifting the control rods to the critical rod position and, after reaching the critical state, lifting the power to the self-sustaining state; sequentially lifting the power from the self-sustaining state to the low-power hot state, the station service power state and the full-power state.

[0006] In some embodiments of the first aspect, performing pre-startup inspection on the gas-cooled micro reactor according to the received startup signal until the inspection is completed comprises: performing system state inspection and nuclear power device parameter inspection on the gas-cooled micro reactor according to the received startup signal until the inspection is completed; the system state inspection comprises: main control system state inspection, auxiliary control system state inspection, signal acquisition processing and monitoring module state inspection, rod control and rod position system state inspection, ex-core nuclear measurement system state inspection, human-machine interface state inspection and energy management system state inspection.

[0007] In some embodiments of the first aspect, the helium turbine-related functions are activated until activation is complete, including: Start the helium turbine cooling circuit function and start the helium turbine function until startup is complete.

[0008] In some embodiments of the first aspect, activating the helium turbine cooling circuit function and activating the helium turbine function include: Start the isolated closed cooling water pump loop, start the closed circulating water pump control function, and put the motor cooling circuit into operation; The energy management system of the gas-cooled microreactor receives the turbine start signal, activates the helium turbine in motor mode, activates the overpressure protection control function of the main circuit, and activates the helium turbine start function.

[0009] In some embodiments of the first aspect, raising the control rod to a critical position and, after reaching the critical state, increasing the power to a self-sustaining state includes: Activate the functions of pulling out the second set of control rods, bringing the first set of control rods to a designated position, and bringing the control rods to a critical position. Determine whether the criticality conditions are met based on the parameters of the nuclear power plant; If the critical condition is met, then the critical state has been reached. After reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed is moved to the first target speed, and the power is increased to achieve a self-sustaining state.

[0010] In some embodiments of the first aspect, the power is sequentially increased from a self-sustaining state to a low-power hot state, a plant auxiliary power state, and a full-power state, including: Increase power from a self-sustaining state to a low-power hot state; From low-power hot state to plant power state; Increase power from the plant's auxiliary power supply to full power.

[0011] In some embodiments of the first aspect, increasing power from a self-sustaining state to a low-power hot state includes: Based on the self-sustaining state, the first set of control rods reaches the second designated position, the helium turbine speed reaches the second target speed, and the power is increased to achieve a low-power hot state.

[0012] In some embodiments of the first aspect, increasing power from a low-power hot state to a plant auxiliary power state includes: Based on the low-power hot state, the first set of control rods reaches the third designated position, the helium filling amount reaches the first target value, the precooler or intercooler reaches the corresponding first target flow rate, and the power is increased to achieve the plant power state.

[0013] In some embodiments of the first aspect, increasing power from the plant auxiliary power state to the full power state includes: Based on the plant power status, the first set of control rods reaches the fourth designated position, the helium filling amount reaches the second target value, the precooler or intercooler reaches the corresponding second target flow rate, and the power is increased to achieve full power.

[0014] Based on the same inventive concept, in a second aspect, embodiments of this application also provide a gas-cooled microreactor start-up sequence control device, comprising: The inspection module is used to perform pre-startup checks on the gas-cooled microreactor based on the received start-up signal until the check is completed. The function activation module is used to activate the helium turbine-related functions until activation is complete. The first power boosting module is used to boost the control rod to the critical rod position and, after reaching the critical state, boost the power to the self-sustaining state. The second power boosting module is used to sequentially boost power from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

[0015] In some implementations of the second aspect, the inspection module is specifically used for: Based on the received start-up signal, the gas-cooled microreactor performs system status checks and nuclear power unit parameter checks until the checks are completed. The system status checks include: main control system status checks, auxiliary control system status checks, signal acquisition, processing and monitoring module status checks, rod control and rod position system status checks, external nuclear measurement system status checks, human-machine interface status checks, and energy management system status checks.

[0016] In some embodiments of the second aspect, the function activation module is specifically used for: Start the helium turbine cooling circuit function and start the helium turbine function until startup is complete.

[0017] In some embodiments of the second aspect, the function activation module is specifically used for: activating the helium turbine cooling circuit function and activating the helium turbine function. Start the isolated closed cooling water pump loop, start the closed circulating water pump control function, and put the motor cooling circuit into operation; make the gas-cooled microreactor's energy management system receive the turbine start signal, put the motor mode helium turbine into operation, put the main circuit overpressure protection control function into operation, and put the helium turbine function into operation.

[0018] In some embodiments of the second aspect, the first power boosting module is specifically used for: The functions of pulling out the second set of control rods, moving the first set of control rods to the designated position, and moving the control rods to the critical position are activated; the critical conditions are determined based on the parameters of the nuclear power unit; if the critical conditions are met, the critical state is determined to have been reached; after reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed is reached to the first target speed, and the power is increased to achieve self-sustaining state.

[0019] In some embodiments of the second aspect, the second power boosting module is specifically used for: Increase power from self-sustaining state to low-power hot state; increase power from low-power hot state to plant power state; increase power from plant power state to full power state.

[0020] In some embodiments of the second aspect, when the second power boosting module boosts power from a self-sustaining state to a low-power hot state, it is specifically used for: Based on the self-sustaining state, the first set of control rods reaches the second designated position, the helium turbine speed reaches the second target speed, and the power is increased to achieve a low-power hot state.

[0021] In some embodiments of the second aspect, when the second power boosting module boosts power from a low-power hot state to a plant power state, it is specifically used for: Based on the low-power hot state, the first set of control rods reaches the third designated position, the helium filling amount reaches the first target value, the precooler or intercooler reaches the corresponding first target flow rate, and the power is increased to achieve the plant power state.

[0022] In some embodiments of the second aspect, when the second power boosting module boosts the power from the plant auxiliary power state to the full power state, it is specifically used for: Based on the plant power status, the first set of control rods reaches the fourth designated position, the helium filling amount reaches the second target value, the precooler or intercooler reaches the corresponding second target flow rate, and the power is increased to achieve full power.

[0023] Based on the same inventive concept, in a third aspect, embodiments of this application also provide a gas-cooled microreactor start-up sequence control device, including: a memory and a processor; The memory stores instructions that the computer executes; The processor executes computer-executable instructions stored in memory to implement the gas-cooled microreactor start-up sequence control method as described in any of the first aspects.

[0024] Based on the same inventive concept, in a fourth aspect, embodiments of this application also provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the gas-cooled microreactor start-up sequence control method as described in any of the first aspects.

[0025] According to the gas-cooled microreactor start-up sequence control method, apparatus, and equipment provided in this application, the gas-cooled microreactor undergoes pre-start-up checks upon receiving a start-up signal until the checks are completed, and helium turbine-related functions are activated until start-up is complete. Simultaneously, the control rods are raised to the critical position, and after reaching the critical state, the power is increased to a self-sustaining state, and from the self-sustaining state, the power is sequentially increased to a low-power hot state, a plant power state, and a full-power state. Thus, by controlling the gas-cooled microreactor to start up rapidly and reach full power according to the start-up sequence, rapid start-up of the gas-cooled microreactor is achieved, shortening the start-up time. Attached Figure Description

[0026] Figure 1 This is a schematic flowchart illustrating a gas-cooled microreactor start-up sequence control method provided in an embodiment of this application; Figure 2 This illustration shows another flowchart of the gas-cooled microreactor start-up sequence control method provided in an embodiment of this application; Figure 3 This is a schematic diagram of an overall process for a gas-cooled microreactor start-up sequence control method provided in an embodiment of this application; Figure 4 This illustration shows a pre-startup check process provided in an embodiment of this application; Figure 5 This document shows a schematic diagram of the startup helium turbine cooling circuit provided in an embodiment of this application. Figure 6 This illustration shows a schematic diagram of the process for starting the helium turbine function according to an embodiment of this application; Figure 7 This illustration shows a schematic diagram of the functional flow of raising the control rod to the critical position according to an embodiment of this application; Figure 8 This illustration shows a schematic diagram of the power-to-self-sufficiency process provided in an embodiment of this application; Figure 9 This illustration shows a schematic diagram of the hot-state function flow from increased power to low power provided in an embodiment of this application. Figure 10 This document illustrates a functional flowchart of the power boosting process to the plant power status provided in an embodiment of this application. Figure 11 This illustration shows a schematic diagram of the process for increasing power to full power according to an embodiment of this application; Figure 12 This diagram illustrates a unit-level control encapsulation module provided in an embodiment of this application. Figure 13 This diagram illustrates a functional group-level control encapsulation module provided in an embodiment of this application. Figure 14 This diagram illustrates a sub-functional group-level control encapsulation module provided in an embodiment of this application. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] As described in the background section, prismatic reactors are primarily used in remote mountainous areas and islands. Due to the complexity and variability of these application scenarios, gas-cooled microreactor power generation devices are required to rapidly meet power demands and shorten start-up and shutdown times. The start-up and shutdown process of a nuclear power plant involves the coordinated actions of multiple systems and devices, requiring sequential, repetitive, and confirmation operations. Therefore, a start-up sequence control method is needed for prismatic reactors to shorten start-up time.

[0031] Example 1

[0032] The gas-cooled microreactor start-up sequence control method provided in this application is applied to a gas-cooled microreactor start-up sequence control device. This device can be a computer or a component within a computer used to implement the gas-cooled microreactor start-up sequence control method. The gas-cooled microreactor start-up sequence control method provided in this application targets a 5MW prismatic reactor, wherein the heat transfer method is direct cycle. The following description uses the execution of this gas-cooled microreactor start-up sequence control method by the gas-cooled microreactor start-up sequence control device as an example.

[0033] like Figure 1 As shown, the gas-cooled microreactor start-up sequence control method provided in this application embodiment may include steps S101 to S104.

[0034] S101. Perform pre-start checks on the gas-cooled microreactor based on the received start signal until the checks are completed.

[0035] For example, based on the control tasks required during the reactor startup process, the control scope is divided into four levels from top to bottom: reactor-level control, functional group-level control, sub-functional group-level control, and equipment-level control. Higher-level control sends instructions to lower-level control, which then executes the specific operations and reports the status back to higher-level control.

[0036] Unit-level control mainly completes the unit status judgment and startup mode guidance throughout the startup process.

[0037] Functional group-level control involves activating or deactivating a specific functional group based on the identification of the unit's operating mode, thereby realizing a certain stage of the process.

[0038] Sub-functional group level control mainly involves the activation and deactivation of a specific equipment group, such as pump groups or valve groups. Using sub-functional group control can optimize the structure of the functional group level control logic and avoid making the logic at the functional group level overly complex.

[0039] Device-level control is the control interface for a single device, which controls the start, stop, or switch of a specific motor or valve.

[0040] For example, when the unit-level control performs pre-start checks, the functional group control performs corresponding system status checks and nuclear power unit parameter checks. Simultaneously, the sub-functional group-level control receives instructions to perform specific status checks, such as main control system status checks, auxiliary control system status checks, signal monitoring module status checks, rod control and rod position system status checks, and external nuclear measurement system status checks. During these specific checks, the equipment-level control performs more detailed operations.

[0041] For example, the start signal can be triggered by the user via a start button or obtained from other communication devices.

[0042] For example, gas-cooled microreactors mainly refer to prism-shaped reactors, such as 5MW prism-shaped reactors.

[0043] S102. Start the helium turbine related functions until startup is complete.

[0044] For example, helium turbine-related functions include helium turbine cooling circuit functions and helium turbine functions. The helium turbine cooling circuit functions provide cooling for critical equipment such as helium turbines, removing heat generated due to efficiency losses and ensuring long-term, reliable operation of these devices within permissible temperatures. The helium turbine functions convert the thermal and pressure energy of high-temperature, high-pressure helium into mechanical energy, thereby driving a generator to produce electricity.

[0045] S103, raise the control rod to the critical position and, after reaching the critical state, raise the power to the self-sustaining state.

[0046] For example, raising the control rods to the critical position is the operation that initiates a reactor from a subcritical shutdown state to achieve initial criticality. To achieve criticality, the control rods need to be raised to a pre-calculated position, which is the critical position.

[0047] Self-sustaining state refers to the ability of a nuclear reactor to sustain a fission chain reaction on its own without the need for an external neutron source.

[0048] S104. The power is sequentially increased from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

[0049] For example, the power is gradually increased from the self-sustaining state, and the reactor is fully started up by controlling the position of the control rods, adjusting the speed of the helium turbine, and the amount of helium charged until the full power state is reached.

[0050] According to the gas-cooled microreactor start-up sequence control method provided in this application, the gas-cooled microreactor undergoes a pre-start-up check upon receiving the start-up signal until the check is completed. Helium turbine-related functions are then activated until start-up is complete. Simultaneously, the control rods are raised to the critical position, and after reaching the critical state, the power is increased to a self-sustaining state. From the self-sustaining state, the power is sequentially increased to a low-power hot state, a plant power state, and a full-power state. This allows for rapid start-up and reaching full power according to the gas-cooled microreactor's start-up sequence, thereby achieving rapid start-up of the gas-cooled microreactor and shortening the start-up time.

[0051] Example 2

[0052] like Figure 2As shown, the gas-cooled microreactor start-up sequence control method provided in this application embodiment is based on the gas-cooled microreactor start-up sequence control method provided in embodiment 1 of this application, and further describes the method, which may include steps S201 to S204.

[0053] S201. Perform pre-start checks on the gas-cooled microreactor based on the received start signal until the checks are completed.

[0054] In some implementations, S201 may be specifically as follows: Based on the received start-up signal, the gas-cooled microreactor undergoes system status checks and nuclear power unit parameter checks until the checks are completed. System status checks include: main control system status checks, auxiliary control system status checks, signal acquisition, processing and monitoring module status checks, rod control and rod positioning system status checks, external nuclear measurement system status checks, human-machine interface status checks, and energy management system status checks.

[0055] For example, the completion flag for system status checks is when all status checks result in "good status" or "meets startup requirements." Similarly, for nuclear power plant parameters, the completion flag is when all nuclear power plant parameters meet startup requirements.

[0056] System status checks and nuclear power unit parameter checks can ensure that the reactor protection system is in standby mode, all system operating paths are in normal mode, and all system response capabilities are in normal mode, thus providing a foundation for rapid reactor startup.

[0057] S202, Start the helium turbine cooling circuit function and start the helium turbine function until the start-up is complete.

[0058] For example, the helium turbine cooling circuit function is activated first, and then the helium turbine function is activated.

[0059] In some implementations, S202 may be specifically as follows: Start the isolated closed cooling water pump loop, start the closed circulating water pump control function, and put the motor cooling circuit into operation.

[0060] The energy management system of the gas-cooled microreactor receives the turbine start signal, activates the helium turbine in motor mode, activates the overpressure protection control function of the main circuit, and activates the helium turbine start function.

[0061] For example, the helium turbine cooling circuit function may also include the instrumentation and control system providing closed-loop isolation control function for the cooling water pump, the instrumentation and control system being able to determine whether the heat trap closed-loop circulating water pump is in operation during startup, and adjusting the subcooling water flow rates of the precooler and intercooler to 7.1 kg / s and 6.9 kg / s, respectively.

[0062] The helium turbine function may also include the instrumentation and control system providing a turbine start signal to the energy management system, and the instrumentation and control system providing a linear increase function for the speed setpoint.

[0063] S203, raise the control rod to the critical position and, after reaching the critical state, raise the power to the self-sustaining state.

[0064] In some implementations, S203 is specifically used for: Activate the functions of pulling out the second set of control rods, bringing the first set of control rods to a designated position, and bringing the control rods to a critical position.

[0065] Determine whether the criticality conditions are met based on the parameters of the nuclear power plant.

[0066] If the critical condition is met, then the critical state has been reached.

[0067] After reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed is moved to the first target speed, and the power is increased to achieve a self-sustaining state.

[0068] For example, the first designated position and the first target rotation speed can be set according to the actual application scenario, and this embodiment does not limit them.

[0069] The activation of the first set of control rods at the designated position introduces positive reactivity during reactor startup and power ramp-up. The activation of the second set of control rods to retract introduces sufficient positive reactivity during reactor startup and power ramp-up, ensuring that the power distribution meets design requirements.

[0070] Activating the function to bring the control rods to the critical position can bring the reactor to a critical state.

[0071] S204. The power is sequentially increased from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

[0072] In some implementations, S204 is specifically used for: Increase power from self-sustaining state to low-power hot state.

[0073] Power is increased from low-power hot state to plant power state.

[0074] Increase power from the plant's auxiliary power supply to full power.

[0075] For example, increasing power from a self-sustaining state to a low-power hot state may include steps such as the instrumentation and control system providing the function of calculating the total number of steps for the first set of control rod positions, bringing the first set of control rods to a second designated position, and bringing the helium turbine speed to a second target speed. The low-power hot state can be a state with 8% of the stack power.

[0076] Increasing power from a low-power hot state to a plant power state can include processes such as adjusting the rotation speed by charging and discharging helium, the first set of control rods reaching the third designated position, the helium charging amount reaching the first target value, the precooler or intercooler reaching the corresponding first target flow rate, and increasing power. The plant power state can be a state of 30% reactor power.

[0077] Increasing power from plant power status to full power status may include processes such as the instrumentation and control system providing grid-connected manual authorization function, adjusting the core outlet temperature via control rods (the outlet temperature setpoint depends on the load), bringing the first set of control rods to the fourth designated position, the helium filling amount reaching the second target value, the precooler or intercooler reaching the corresponding second target flow rate, and increasing power.

[0078] In some implementations, the process of increasing power from a self-sustaining state to a low-power hot state can be specifically as follows: Based on the self-sustaining state, the first set of control rods reaches the second designated position, the helium turbine speed reaches the second target speed, and the power is increased to achieve a low-power hot state.

[0079] For example, the process of increasing power from a self-sustaining state to a low-power hot state mainly involves bringing the first set of control rods to the second designated position, the helium turbine speed to the second target speed, and increasing power to achieve a low-power hot state.

[0080] The second designated position and the second target rotation speed can be set according to actual applications, and this embodiment does not limit them.

[0081] In some implementations, the process of increasing power from a low-power hot state to a plant auxiliary power state can be specifically as follows: Based on the low-power hot state, the first set of control rods reaches the third designated position, the helium filling amount reaches the first target value, the precooler or intercooler reaches the corresponding first target flow rate, and the power is increased to achieve the plant power state.

[0082] For example, the process of increasing power from a low-power hot state to a plant power state mainly involves making the first set of control rods reach the third designated position, the helium filling amount reach the first target value, the precooler or intercooler reach the corresponding first target flow rate, and increasing the power to reach the plant power state.

[0083] The third designated location, the first target value, and the first target flow can be set according to actual applications, and this embodiment does not limit them.

[0084] In some implementations, the process of increasing power from the plant auxiliary power state to the full power state can be specifically as follows: Based on the plant power status, the first set of control rods reaches the fourth designated position, the helium filling amount reaches the second target value, the precooler or intercooler reaches the corresponding second target flow rate, and the power is increased to achieve full power.

[0085] For example, the process of increasing power from the plant power state to the full power state mainly involves making the first set of control rods reach the fourth designated position, the helium filling amount reach the second target value, the precooler or intercooler reach the corresponding second target flow rate, and increasing the power to reach the full power state.

[0086] The fourth specified location, the second target value, and the second target flow can be set according to the actual application, and this embodiment does not limit them.

[0087] The gas-cooled microreactor start-up sequence control method of this embodiment involves performing system status checks and nuclear power unit parameter checks on the gas-cooled microreactor until the checks are completed, activating the helium turbine cooling circuit function and the helium turbine function until startup is complete. Simultaneously, the functions of pulling out the second set of control rods, moving the first set of control rods to a designated position, and moving the control rods to the critical position are activated. After reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed reaches the first target speed, and the power is increased to achieve a self-sustaining state. From the self-sustaining state, the power is increased to a low-power hot state, from the low-power hot state to the plant power state, and from the plant power state to the full-power state. Thus, according to the start-up sequence of the gas-cooled microreactor, it is controlled to quickly start up and reach full power, thereby achieving rapid start-up of the gas-cooled microreactor and shortening the start-up time.

[0088] To better understand the gas-cooled microreactor start-up sequence control method provided in this application embodiment, an exemplary description is given below in conjunction with a specific application implementation.

[0089] This embodiment provides an exemplary description of the start-up control of a 5MW prismatic reactor, where the heat transfer method is direct circulation.

[0090] like Figure 3 As shown, the startup process mainly includes: S301. Pre-start checks.

[0091] For pre-startup checks, such as Figure 4 As shown, the main tasks include system status checks and nuclear power unit parameter checks. System status checks include the main control system status check, auxiliary control system status check, signal acquisition, processing and monitoring module status check, rod control and rod position system status check, external nuclear measurement system status check, human-machine interface status check, and energy management system status check.

[0092] Pre-start checks are initiated by unit-level control instructions, executed by functional groups to check system status and nuclear power unit parameters, and by functional subgroups to perform more specific system status checks.

[0093] S302. Start the helium turbine cooling circuit.

[0094] For activating the helium turbine cooling circuit function, such as Figure 5 As shown, the main functions include isolating the closed-loop cooling water pump, controlling the start-up of the closed-loop circulating water pump, and activating the motor cooling circuit. Specifically, it should also provide: closed-loop cooling water pump isolation control; closed-loop circulating water pump control; the ability to determine whether the heat trap closed-loop circulating water pump is activated during startup; motor cooling circuit control; adjusting the subcooling water flow rates of the precooler and intercooler to 7.1 kg / s and 6.9 kg / s respectively; determining whether the motor cooling circuit is activated during startup; and determining whether the helium turbine cooling circuit is activated during startup.

[0095] Starting the helium turbine cooling circuit is part of the startup to critical state process. The startup to critical state is indicated by the unit-level control, executed by the functional group, and further executed by the functional subgroup for various specific startups.

[0096] S303, Start the helium turbine.

[0097] For completing the helium turbine startup process, such as Figure 6 As shown, the main functions include receiving a turbine start signal from the energy management system, activating the helium turbine in motor mode, activating the overpressure protection control function of the main circuit, and activating the helium turbine start function. Additionally, it can also perform the following: the instrumentation and control system provides a turbine start signal to the energy management system; the instrumentation and control system should be able to determine whether the helium turbine in motor mode is activated; the instrumentation and control system should provide a linear increase function for the speed setpoint; the instrumentation and control system should provide a main circuit pressure control function; and the instrumentation and control system should be able to determine whether the helium turbine start function is activated during the start-up process.

[0098] Starting the helium turbine is part of the process of starting up to the critical state. Starting up to the critical state is indicated by the unit-level control, the functional group controls and executes the starting of the helium turbine, and the functional subgroup controls and executes more specific types of startups.

[0099] S304, Raise the control rod to the critical position.

[0100] For the function of raising the control rod to the critical rod position, such as Figure 7As shown, the main functions include pulling out the second set of control rods, moving the first set of control rods to a designated position, and moving the control rods to the critical position. Additionally, the system should provide control functions for the second set of control rods, determine whether the second set of control rods has been pulled out, provide control functions for the first set of control rods, determine whether the first set of control rods has been pulled out to a designated position, determine whether the function of raising the control rods to the critical position has been activated during startup, and determine when the reactor reaches a critical state during startup.

[0101] Raising the control bar to the critical position is part of the startup to critical state process. The startup to critical state is indicated by the unit-level control, executed by the functional group, and further executed by the functional subgroup for various specific startup processes.

[0102] S305, Critical state reached.

[0103] Reaching the critical state mainly involves determining the critical parameters of the nuclear power plant.

[0104] S306, Power Enhancement to Self-Sustainability.

[0105] For boosting power to self-sustaining functionality, such as Figure 8 As shown, the main functions include: the first set of control rods reaching the designated position; the helium turbine speed reaching the target value; and achieving self-sustaining operation. Specifically, it should also provide: a power-up authorization function after criticality; a function to calculate the total number of steps for the first set of control rod positions based on the heating rate (50℃ / h) to achieve self-sustaining operation; control functions for the first set of control rods; a speed setpoint curve controlled by the motor; a source range detector cutoff function during reactor startup; closed-loop cooling water flow regulation control; main loop pressure control; the ability to determine whether the power-up to low-power function is activated during startup; and the ability to determine when the reactor reaches self-sustaining operation (2.5% nuclear power) during startup.

[0106] The process of increasing power to self-sustaining is part of the process from critical state to low power hot state. The process from critical state to low power hot state is indicated by the unit-level control, executed by the functional group, and further executed by the functional subgroup.

[0107] S307, increase power to low power hot state.

[0108] Functionality to boost power to low-power hot state, such as... Figure 9As shown, the main functions include bringing the first set of control rods to the designated position, achieving the target helium turbine rotation speed, and reaching a low-power hot state, increasing the power to 8% of the reactor power. Specifically, it should also provide: a rotation speed setpoint curve for generator control; calculate the total number of steps for the first set of control rods based on the heating rate (50℃ / h); provide control functions for the first set of control rods; provide closed-loop cooling water flow regulation control; determine whether to activate the power increase to 8% during startup; and determine when the reactor reaches a low-power hot state during startup.

[0109] The process of increasing power to a low-power hot state is part of the process of transitioning from a critical state to a low-power hot state. The transition from a critical state to a low-power hot state is indicated by the unit-level control, executed by the functional group, and further executed by the functional subgroup.

[0110] S308, Increase power to plant power status.

[0111] For the process of upgrading power to the plant auxiliary power state, such as Figure 10 As shown, the main tasks include ensuring the first set of control rods reaches the designated position, the helium charge reaches the target value, and the precooler / intercooler reaches the target flow rate. It can also perform the following: tracking the plant power load and adjusting the rotational speed through helium charging and discharging; calculating the total number of steps for the first set of control rod positions based on the plant power load, up to 30% reactor power; providing control functions for the first set of control rods; providing closed-loop cooling water flow regulation control; determining whether the power boosting function to the plant power state is activated during startup; and determining when the reactor reaches the plant power state during start-up.

[0112] The process of upgrading power to the plant auxiliary power state falls under the category of upgrading power from a low-power hot state to the plant auxiliary power state. This process is initiated by the unit-level control, executed by the functional group, and further controlled by the functional subgroup for various specific startup procedures.

[0113] S309, The plant power supply status has been reached.

[0114] S310, Increase power to full power.

[0115] For processes that boost power to full power, such as Figure 11As shown, the main tasks include ensuring the first set of control rods reaches the designated position, the helium charge reaches the target value, and the precooler / intercooler reaches the target flow rate. Additionally, the instrumentation and control system should provide: a manual grid connection authorization function; track user load and adjust the core outlet temperature via control rods (the outlet temperature setpoint depends on the load); provide the first set of control rod control functions; track user load and adjust the rotational speed via helium charging and discharging (the rotational speed setpoint depends on the load); provide main loop bypass control; determine whether the power boost to full power function is activated during startup; and determine when the reactor reaches full power during start-up.

[0116] Increasing power to full power is part of the process of changing the power supply status to full power. The process of changing the power supply status to full power is indicated by the unit-level control, executed by the functional group, and further executed by the functional subgroup.

[0117] S311, reaching full power.

[0118] Subsequently, unit-level control, functional group control, and sub-functional group control are modularized.

[0119] Among them, the unit-level control encapsulation module, such as Figure 12 As shown in Table 1, the meaning of each pin is as follows: Table 1. Pin Definitions for Unit-Level Control Modules

[0120] Functional group-level control encapsulation module, such as Figure 13 As shown in Table 1, the meanings of each pin are as follows. B_7 is connected to the activation judgment, and SYR-1FC-1228 is the identifier.

[0121] Sub-functional group level control encapsulation module such as Figure 14 As shown in Table 1, the meanings of each pin are as follows. B_1 is connected to the closed-loop cooling water pump, and is identified by SYR-1FC-1602.

[0122] Finally, connecting the above modules according to the judgment can realize the control of the nuclear power plant startup sequence.

[0123] It is understood that the various method embodiments mentioned above in this application can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further. Those skilled in the art will understand that in the above methods of specific implementation, the specific execution order of each step should be determined by its function and possible internal logic.

[0124] Example 3

[0125] The gas-cooled microreactor start-up sequence control device provided in this embodiment is located in the gas-cooled microreactor start-up sequence control equipment. The gas-cooled microreactor start-up sequence control device may include: The inspection module is used to perform pre-startup checks on the gas-cooled microreactor based on the received start-up signal until the check is completed.

[0126] The function startup module is used to start the helium turbine-related functions until startup is complete.

[0127] The first power boosting module is used to boost the control rod to the critical position and, after reaching the critical state, boost the power to a self-sustaining state.

[0128] The second power boosting module is used to sequentially boost power from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

[0129] In some implementations, the inspection module is specifically used for: Based on the received start-up signal, the gas-cooled microreactor undergoes system status checks and nuclear power unit parameter checks until the checks are completed. System status checks include: main control system status checks, auxiliary control system status checks, signal acquisition, processing and monitoring module status checks, rod control and rod positioning system status checks, external nuclear measurement system status checks, human-machine interface status checks, and energy management system status checks.

[0130] In some implementations, the function activation module is specifically used for: Start the helium turbine cooling circuit function and start the helium turbine function until startup is complete.

[0131] In some implementations, the function activation module is specifically used to: activate the helium turbine cooling circuit function and activate the helium turbine function. The isolated closed-loop cooling water pump is activated, the closed-loop circulating water pump control function is activated, and the motor cooling circuit is put into operation. The energy management system of the gas-cooled microreactor receives the turbine start signal, the motor-mode helium turbine is put into operation, the main circuit overpressure protection control function is activated, and the helium turbine function is activated.

[0132] In some implementations, the first power boosting module is specifically used for: The functions of pulling out the second set of control rods, moving the first set of control rods to the designated position, and moving the control rods to the critical position are activated. The nuclear power unit parameters are used to determine if the critical conditions are met. If the critical conditions are met, the critical state is determined to have been reached. After reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed reaches the first target speed, and the power is increased to achieve self-sustaining operation.

[0133] In some implementations, the second power boosting module is specifically used for: Increase power from self-sustaining state to low-power hot state. Increase power from low-power hot state to auxiliary power state. Increase power from auxiliary power state to full power state.

[0134] In some implementations, when the second power boosting module boosts power from a self-sustaining state to a low-power hot state, it is specifically used for: Based on the self-sustaining state, the first set of control rods reaches the second designated position, the helium turbine speed reaches the second target speed, and the power is increased to achieve a low-power hot state.

[0135] In some implementations, the second power boosting module, when boosting power from a low-power hot state to a plant auxiliary power state, is specifically used for: Based on the low-power hot state, the first set of control rods reaches the third designated position, the helium filling amount reaches the first target value, the precooler or intercooler reaches the corresponding first target flow rate, and the power is increased to achieve the plant power state.

[0136] In some implementations, when the second power boosting module boosts the power from the plant auxiliary power state to the full power state, it is specifically used for: Based on the plant power status, the first set of control rods reaches the fourth designated position, the helium filling amount reaches the second target value, the precooler or intercooler reaches the corresponding second target flow rate, and the power is increased to achieve full power.

[0137] The gas-cooled microreactor start-up sequence control device provided in this application has the beneficial effects and implementation methods of the gas-cooled microreactor start-up sequence control method provided in Embodiments 1 and 2 of this application. For details, please refer to the specific description of the gas-cooled microreactor start-up sequence control method in Embodiments 1 and 2 above. This embodiment will not repeat the description here.

[0138] Example 4

[0139] This application also provides a gas-cooled microreactor start-up sequence control device, which is intended for various forms of devices with data processing capabilities. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0140] The gas-cooled microreactor start-up sequence control device includes a processor and a memory. The various components are interconnected via different buses and can be mounted on a common motherboard or, as needed, in other ways. The processor can process instructions executed within the gas-cooled microreactor start-up sequence control device.

[0141] The memory is the non-transitory computer-readable storage medium provided in this application. The memory stores instructions executable by at least one processor to cause at least one processor to execute the gas-cooled microreactor start-up sequence control method provided in this application. The non-transitory computer-readable storage medium of this application stores computer instructions for causing a computer to execute the gas-cooled microreactor start-up sequence control method provided in this application.

[0142] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the gas-cooled microreactor start-up sequence control method in the embodiments of this application. The processor executes various functional applications and data processing of the gas-cooled microreactor start-up sequence control device by running the non-transitory software programs, instructions, and modules stored in the memory, thereby implementing the gas-cooled microreactor start-up sequence control method in the above method embodiments.

[0143] The gas-cooled microreactor start-up sequence control device provided in this application has the beneficial effects and implementation methods of the gas-cooled microreactor start-up sequence control method provided in Embodiments 1 and 2 of this application. For details, please refer to the specific description of the gas-cooled microreactor start-up sequence control method in Embodiments 1 and 2 above. This embodiment will not repeat the description here.

[0144] Example 5

[0145] This embodiment also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements the gas-cooled microreactor start-up sequence control method in Embodiment 1 or Embodiment 2 above.

[0146] The computer-readable storage medium provided in this application embodiment has the beneficial effects and implementation methods of the gas-cooled microreactor start-up sequence control method of embodiment 1 and embodiment 2 of this application. For details, please refer to the specific description of the gas-cooled microreactor start-up sequence control method in embodiment 1 and embodiment 2 above. This embodiment will not repeat the description here.

[0147] As is known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable program instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), flash memory or other memory technologies, portable compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, it is known to those skilled in the art that communication media typically contain computer-readable program instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0148] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0149] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A method for controlling the start-up sequence of a gas-cooled microreactor, characterized in that, include: The gas-cooled microreactor undergoes pre-start checks based on the received start-up signal until the checks are completed. Start the helium turbine's relevant functions until startup is complete; Raise the control rod to the critical position and, after reaching the critical state, increase the power to a self-sustaining state; The power is sequentially increased from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

2. The method according to claim 1, characterized in that, The process of performing pre-startup checks on the gas-cooled microreactor based on the received start-up signal until the checks are completed includes: Based on the received start signal, the gas-cooled microreactor performs system status checks and nuclear power unit parameter checks until the checks are completed. The system status checks include: main control system status checks, auxiliary control system status checks, signal acquisition, processing and monitoring module status checks, rod control and rod position system status checks, external nuclear measurement system status checks, human-machine interface status checks and energy management system status checks.

3. The method according to claim 1, characterized in that, The process of activating the helium turbine-related functions until activation is complete includes: Start the helium turbine cooling circuit function and start the helium turbine function until startup is complete.

4. The method according to claim 3, characterized in that, The functions of activating the helium turbine cooling circuit and activating the helium turbine include: Start the isolated closed cooling water pump loop, start the closed circulating water pump control function, and put the motor cooling circuit into operation; The energy management system of the gas-cooled microreactor receives the turbine start signal, activates the helium turbine in motor mode, activates the overpressure protection control function of the main circuit, and activates the helium turbine start function.

5. The method according to claim 1, characterized in that, The process of raising the control rod to the critical position and, after reaching the critical state, raising the power to a self-sustaining state includes: Activate the functions of pulling out the second set of control rods, bringing the first set of control rods to a designated position, and bringing the control rods to a critical position. Determine whether the criticality conditions are met based on the parameters of the nuclear power plant; If the critical condition is met, then the critical state has been reached. After reaching the critical state, the first set of control rods is moved to the first designated position, the helium turbine speed is moved to the first target speed, and the power is increased to achieve a self-sustaining state.

6. The method according to claim 1, characterized in that, The process of sequentially increasing power from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state includes: Increase power from a self-sustaining state to a low-power hot state; From low-power hot state to plant power state; Increase power from the plant's auxiliary power supply to full power.

7. The method according to claim 6, characterized in that, The process of increasing power from a self-sustaining state to a low-power hot state includes: Based on the self-sustaining state, the first set of control rods reaches the second designated position, the helium turbine speed reaches the second target speed, and the power is increased to achieve a low-power hot state.

8. The method according to claim 6, characterized in that, The process of increasing power from a low-power hot state to a plant power state includes: Based on the low-power hot state, the first set of control rods reaches the third designated position, the helium filling amount reaches the first target value, the precooler or intercooler reaches the corresponding first target flow rate, and the power is increased to achieve the plant power state.

9. The method according to claim 6, characterized in that, The process of increasing power from the plant's auxiliary power state to full power state includes: Based on the plant power status, the first set of control rods is moved to the fourth designated position, the helium filling amount reaches the second target value, the precooler or intercooler reaches the corresponding second target flow rate, and the power is increased to achieve full power.

10. A gas-cooled microreactor start-up sequence control device, characterized in that, include: The inspection module is used to perform pre-startup checks on the gas-cooled microreactor based on the received start-up signal until the check is completed. The function activation module is used to activate the helium turbine-related functions until activation is complete. The first power boosting module is used to boost the control rod to the critical rod position and, after reaching the critical state, boost the power to the self-sustaining state. The second power boosting module is used to sequentially boost the power from the self-sustaining state to the low-power hot state, the plant power state, and the full-power state.

11. A gas-cooled microreactor start-up sequence control device, characterized in that, include: Memory and processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the gas-cooled microreactor start-up sequence control method as described in any one of claims 1 to 9.

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