Steam generation system, method and reactor system

Abstract

The application relates to a steam generation system, a method and a reactor system. The system comprises: a movable feed water tank connected to a steam generator through a main feed water pump, and a non-movable feed water tank connected to the steam generator; by using the system, on one hand, a controller controls the main feed water pump to work under the condition that the main feed water pump is normal, so that the movable feed water tank supplies water to the steam generator; at the same time that the main feed water pump supplies water to the steam generator, the water supply path of the movable feed water tank comprises the non-movable feed water tank, so that the temperature of the water in the non-movable feed water tank, the temperature of the water in the movable feed water tank and the water supply temperature of the steam generator remain unchanged, thereby avoiding the condition of temperature impact and improving the system stability. On the other hand, the controller also controls the non-movable feed water tank to supply water to the steam generator under the condition that the main feed water pump is abnormal, that is, the steam generator can be normally supplied with water even under the condition that the main feed water pump is stopped, thereby avoiding the over-temperature of the reactor and improving the system stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power plant system equipment design, in particular to a steam generation system, method and reactor system. BACKGROUND

[0002] In the daily operation of a nuclear power plant, a reactor generates a large amount of heat, and the reactor transmits the heat to a secondary loop through a steam generation system to avoid the temperature of the reactor from being too high. The heat transmission efficiency is largely dependent on the stability of a feedwater system for supplying water in the steam generation system.

[0003] In a conventional manner, the feedwater system is composed of a water tank and a feedwater pump, and the feedwater pump extracts water in the water tank and delivers the water to a steam generator. After the entire plant loses alternating current power, the feedwater pump stops operating, and the stability of the steam generation system is still low. SUMMARY

[0004] Therefore, it is necessary to provide a steam generation system, method, reactor system, device, computer equipment, computer readable storage medium and computer program product capable of improving system stability in view of the above technical problems.

[0005] In a first aspect, the present application provides a steam generation system comprising: an active water tank, a main feedwater pump, a passive water tank, a steam generator and a controller; the active water tank is connected to the steam generator through the main feedwater pump; the passive water tank is connected to the steam generator; the controller controls the main feedwater pump to work under normal conditions, so that the active water tank supplies water to the steam generator; the water supply path of the active water tank comprises the passive water tank; and the controller further controls the passive water tank to supply water to the steam generator under abnormal conditions of the main feedwater pump.

[0006] In one of the embodiments, the system further comprises: a water injection pipe isolation valve arranged between the passive water tank and the steam generator; and a main feedwater isolation valve arranged between the main feedwater pump and the steam generator.

[0007] In one of the embodiments, the system further comprises: a high-pressure gas tank connected to the passive water tank, the gas pressure in the passive water tank and the gas pressure in the high-pressure gas tank are kept in pressure balance; a gas compressor arranged on the high-pressure gas tank; and the controller acquires the liquid level of the passive water tank under normal conditions of the main feedwater pump, and controls the gas compressor to work based on the numerical difference between the liquid level and a preset height, so that the numerical difference is less than a difference threshold.

[0008] In one of the embodiments, the system further comprises a liquid level measuring probe arranged in the passive water tank; the liquid level measuring probe is configured to detect a liquid level of the passive water tank; the controller is further configured to control the valve opening degree of the water injection pipe isolation valve to stop the passive water tank from supplying water to the steam generator, in the case that the main feed water pump is abnormal and the liquid level is less than a height threshold.

[0009] In one of the embodiments, the system further comprises a makeup check valve arranged between the main feed water pump and the passive water tank; a main feed water check valve arranged between the main feed water pump and the steam generator; the controller is further configured to control the makeup check valve and the main feed water check valve to be in an open state in the case that the main feed water pump is normal, and control the makeup check valve and the main feed water check valve to be in a closed state in the case that the main feed water pump is abnormal.

[0010] In one of the embodiments, the steam generator comprises a steam header and a feed water header; the system further comprises a condensing heat exchanger connected to the steam header and the feed water header respectively; the controller is configured to control the condensing heat exchanger to work to supply water to the feed water header and receive generated steam from the steam header, in the case that the main feed water pump is abnormal.

[0011] In one of the embodiments, the system further comprises a steam pipe isolation valve arranged between the steam header and the condensing heat exchanger; a backflow pipe isolation valve arranged between the condensing heat exchanger and the feed water header; the controller is further configured to control the water supply amount of the condensing heat exchanger by adjusting the valve opening degree of the steam pipe isolation valve, and control the steam amount received by the condensing heat exchanger by adjusting the valve opening degree of the backflow pipe isolation valve.

[0012] In one of the embodiments, the system further comprises a main steam isolation valve connected to the steam header; the main steam isolation valve is in a different steam loop from the steam pipe isolation valve; the controller is configured to control the valve opening degree of the main steam isolation valve to make the steam in the steam header be delivered to the turbine through the main steam isolation valve to drive the turbine to generate electricity, in the case that the main feed water pump is normal; the controller is configured to control the valve opening degree of the main steam isolation valve to make the steam in the steam header be delivered to the condensing heat exchanger through the steam pipe isolation valve, in the case that the main feed water pump is abnormal.

[0013] In a second aspect, the application provides a steam generation method applied to the controller as described above, the method comprising: controlling the main feed water pump to work to make the active water tank supply water to the steam generator, in the case that the main feed water pump is normal; the water supply path of the active water tank comprising the passive water tank; controlling the passive water tank to supply water to the steam generator, in the case that the main feed water pump is abnormal.

[0014] In a third aspect, the application provides a reactor system comprising the steam generation system as described above, and a reactor for heating the steam generator.

[0015] Fourthly, this application also provides a steam generating device. The device includes: a normal water supply module for controlling the main feedwater pump to operate when the main feedwater pump is operating normally, so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes a passive feedwater tank; and an abnormal water supply module for controlling the passive feedwater tank to supply water to the steam generator when the main feedwater pump malfunctions.

[0016] When the main feedwater pump is operating normally, control the main feedwater pump to supply water to the steam generator from the active feedwater tank; the water supply path of the active feedwater tank includes the passive feedwater tank; when the main feedwater pump is malfunctioning, control the passive feedwater tank to supply water to the steam generator.

[0017] Fifthly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0018] When the main feedwater pump is operating normally, control the main feedwater pump to supply water to the steam generator from the active feedwater tank; the water supply path of the active feedwater tank includes the passive feedwater tank; when the main feedwater pump is malfunctioning, control the passive feedwater tank to supply water to the steam generator.

[0019] Sixthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0020] When the main feedwater pump is operating normally, control the main feedwater pump to supply water to the steam generator from the active feedwater tank; the water supply path of the active feedwater tank includes the passive feedwater tank; when the main feedwater pump is malfunctioning, control the passive feedwater tank to supply water to the steam generator.

[0021] Seventhly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0022] When the main feedwater pump is operating normally, control the main feedwater pump to supply water to the steam generator from the active feedwater tank; the water supply path of the active feedwater tank includes the passive feedwater tank; when the main feedwater pump is malfunctioning, control the passive feedwater tank to supply water to the steam generator.

[0023] The aforementioned steam generation system, method, and reactor system include an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator, and a controller. The active feedwater tank is connected to the steam generator via the main feedwater pump, and the passive feedwater tank is also connected to the steam generator. Using this system, on the one hand, when the main feedwater pump is operating normally, the controller controls the main feedwater pump to operate, enabling the active feedwater tank to supply water to the steam generator. The feedwater path of the active feedwater tank includes the passive feedwater tank. This ensures that the water temperatures in the passive and active feedwater tanks, as well as the water supply temperature to the steam generator, remain constant, thus avoiding temperature shocks and improving system stability. On the other hand, the controller also controls the passive feedwater tank to supply water to the steam generator in the event of a main feedwater pump malfunction. Even when the main feedwater pump is shut down, the steam generator can still be supplied with water normally, preventing reactor overheating and further improving system stability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the steam generation system in one embodiment;

[0025] Figure 2 This is a partial structural diagram of the steam generation system in one embodiment;

[0026] Figure 3 This is a schematic diagram of a gas compressor in one embodiment;

[0027] Figure 4 This is a schematic diagram of a check valve in one embodiment;

[0028] Figure 5 This is a schematic diagram of a condensation heat exchange circuit in one embodiment;

[0029] Figure 6 This is a schematic diagram of a condensation heat exchange system in one embodiment;

[0030] Figure 7 This is a schematic flowchart of a steam generation method in one embodiment;

[0031] Figure 8 This is a schematic diagram of the structure of an advanced reactor system in one embodiment;

[0032] Figure 9 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0033] 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.

[0034] In one embodiment, such as Figure 1 As shown, a steam generation system is provided, which includes: an active feedwater tank 110, a main feedwater pump 120, a passive feedwater tank 130, a steam generator 140, and a controller 150.

[0035] The active water tank 110 is connected to the steam generator 140 via the main water pump 120;

[0036] The active feedwater tank can be a water tank used to store cooling water. The water source for the active feedwater tank can be condensate produced by the power plant condenser after condensing the exhaust steam from the turbine.

[0037] The main feed water pump can be a mechanical device used to transport water. Specifically, the main feed water pump uses pressure difference and centrifugal force to drive the impeller to rotate through a motor, thereby using centrifugal force to pump water from a lower position to a higher position.

[0038] The main feedwater pump is connected to the active feedwater tank. It draws cooling water or condensate from the active feedwater tank and delivers the water to the passive feedwater tank or the steam generator. For example, the main feedwater pump can be connected to the bottom of the active feedwater tank via a suction line to draw condensate from the tank, pressurize it, and then inject it into the steam generator through the main feedwater pipeline. This continuously supplies water to the steam generator, achieving heat exchange and preventing overheating of the steam generator.

[0039] A steam generator is a device that produces steam by heating liquid water. It uses a heat source to heat water to its boiling point, forming steam. In a reactor, the heat exchange characteristics of the steam generator are used to remove heat from the reactor. This removed heat can be in the form of steam, which can then drive turbine blades to generate electricity.

[0040] The steam generator can be located downstream of the main feedwater pipeline corresponding to the main feedwater pump.

[0041] The passive water tank 130 is connected to the steam generator 140.

[0042] The passive feedwater tank can be a water tank used to store cooling water. The cold water in the passive feedwater tank comes from the main feedwater pump, and its bottom is connected to the main feedwater pipeline through a water supply line.

[0043] The passive feedwater tank is connected to the main feedwater pump via a makeup water pipeline. The steam generator is connected to the main feedwater pump via the main feedwater pipeline. The diameter of the makeup water pipeline can be smaller than that of the main feedwater pipeline, ensuring that the water pumped by the main feedwater pump is mainly used to supply water to the steam generator, thus guaranteeing the water supply to the steam generator.

[0044] When the main feedwater pump 110 is operating normally, the controller 150 controls the main feedwater pump 120 to operate, so that the active feedwater tank 110 supplies water to the steam generator 140. The water supply path of the active feedwater tank 110 includes the passive feedwater tank 130.

[0045] The controller can be a device with data processing capabilities, such as a PLC or a computing device.

[0046] The water supply path of the active water supply tank can include the main water supply line and the auxiliary water supply line.

[0047] The main water supply line may include a main water supply pump, a main water supply pipeline, and a steam generator. The auxiliary water supply line may include a main water supply pump, a makeup water pipeline, a passive water supply tank, a water injection pipeline, and a steam generator. Specifically, the auxiliary water supply line may include a main water supply pump, part of the main water supply pipeline, a makeup water pipeline, a passive water supply tank, a water injection pipeline, part of the main water supply pipeline, and a steam generator.

[0048] Specifically, under normal operating conditions, the controller can control the main feedwater pump to supply water to the steam generator along the main feedwater line. The controller can also control the main feedwater pump to supply water to the passive feedwater tank, and the water in the passive feedwater tank flows into the steam generator.

[0049] In the event of an abnormality in the main feedwater pump 120, the controller 150 also controls the passive feedwater tank 130 to supply water to the steam generator 140.

[0050] Among them, the main feed water pump malfunction can indicate that the main feed water pump cannot perform the function of pumping and delivering water. For example, the main feed water pump malfunction can be any of the following: circuit failure of the main feed water pump, power failure of the main feed water pump, or motor damage of the main feed water pump.

[0051] Specifically, in the event of a malfunction in the main feedwater pump, the controller can control the passive feedwater tank to supply water to the steam generator.

[0052] In one embodiment, the controller can control the opening of the water injection pipe isolation valve on the water injection line of the passive feedwater tank, thereby ensuring that the water in the passive feedwater tank flows to the steam generator.

[0053] In one embodiment, to ensure that water in the passive feedwater tank flows to the steam generator and not back to the main feedwater pump, a check valve can be installed between the passive feedwater tank and the main feedwater pump. The check valve is open when the main feedwater pump is operating normally. The check valve is closed when the main feedwater pump malfunctions.

[0054] In the aforementioned system, the steam generation system includes an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator, and a controller. The active feedwater tank is connected to the steam generator via the main feedwater pump, and the passive feedwater tank is also connected to the steam generator. Using this system, on the one hand, when the main feedwater pump is operating normally, the controller controls the main feedwater pump to operate, ensuring that the active feedwater tank supplies water to the steam generator. The feedwater path of the active feedwater tank includes the passive feedwater tank. This ensures that while the main feedwater pump is supplying water to the steam generator, the feedwater path of the active feedwater tank also includes the passive feedwater tank, maintaining a constant water temperature across the passive and active feedwater tanks, as well as the feedwater temperature to the steam generator. This prevents temperature shocks and improves system stability. On the other hand, the controller also controls the passive feedwater tank to supply water to the steam generator in case of a main feedwater pump malfunction. Even when the main feedwater pump stops, the system can still supply water to the steam generator normally, preventing reactor overheating and further improving system stability.

[0055] In one embodiment, such as Figure 2 As shown, the steam generation system also includes: a water injection pipe isolation valve installed between the passive feedwater tank and the steam generator; and a main feedwater isolation valve installed between the main feedwater pump and the steam generator.

[0056] The water injection pipe isolation valve can be an isolation valve installed between the passive feedwater tank and the steam generator. The water injection pipe isolation valve is used to control the water flow between the passive feedwater tank and the steam generator. Specifically, the water injection pipe isolation valve is used to control the water flow in the auxiliary feedwater circuit.

[0057] The main feedwater isolation valve is an isolation valve installed between the main feedwater pump and the steam generator. The main feedwater isolation valve is used to control the water flow between the main feedwater pump and the steam generator. Specifically, the main feedwater isolation valve is used to control the water flow in the main feedwater circuit.

[0058] When the main water supply pump is operating normally, the controller obtains the liquid level of the passive water supply tank and controls the valve opening of the water injection pipe isolation valve and the main water supply isolation valve based on the difference between the liquid level and the preset height, so that the difference is less than the difference threshold.

[0059] The liquid level in the passive feedwater tank can represent the height of the liquid level in the passive feedwater tank.

[0060] The preset height can be a preset value set for the liquid level.

[0061] Valve opening degree can indicate the degree of opening of an isolation valve. For example, the angle or stroke of the valve when it is open.

[0062] Numerical differences can include liquid level greater than preset height, liquid level equal to preset height, and liquid level less than preset height.

[0063] The difference threshold can be a threshold value configured for numerical differences. The size of the difference threshold can be flexibly selected according to the actual situation. For example, the difference threshold can be set to 0.01 times the total height of the passive water supply tank.

[0064] Specifically, under normal operating conditions of the main feedwater pump, the controller can obtain the liquid level in the passive feedwater tank and a preset height for that level. Based on the difference between the liquid level and the preset height, if the difference indicates the liquid level is greater than the preset height, the controller can increase the opening of the injection pipe isolation valve and the main feedwater isolation valve. If the difference indicates the liquid level is equal to the preset height, the controller can maintain the opening of the injection pipe isolation valve. If the difference indicates the liquid level is less than the preset height, the controller can decrease the opening of both the injection pipe isolation valve and the main feedwater isolation valve.

[0065] In one embodiment, a liquid level sensor can be installed in the passive water tank, and the controller can obtain the liquid level of the passive water tank through the liquid level sensor.

[0066] In this embodiment, an isolation valve for the water injection pipe is installed between the passive feedwater tank and the steam generator, and a main feedwater isolation valve is installed between the main feedwater pump and the steam generator. When the main feedwater pump is operating normally, the controller acquires the liquid level in the passive feedwater tank and, based on the difference between the liquid level and a preset height, controls the opening of both the water injection pipe isolation valve and the main feedwater isolation valve. This ensures the difference is less than a threshold value, maintaining a stable total water level in the passive feedwater tank. The water level is kept below the threshold to guarantee the duration of water supply from the passive feedwater tank to the steam generator should the main feedwater pump malfunction. The water level is kept below the threshold to avoid the risk of overpressure in the passive feedwater tank.

[0067] In one embodiment, such as Figure 3 The schematic diagram of the gas compressor shown illustrates that the steam generation system also includes a high-pressure gas tank connected to a passive feedwater tank, where the gas pressure is maintained in pressure balance with that in the high-pressure gas tank. A gas compressor is mounted on the high-pressure gas tank. When the main feedwater pump is operating normally, the controller acquires the liquid level in the passive feedwater tank and, based on the difference between the liquid level and a preset level, controls the gas compressor to operate, ensuring that the difference is less than a threshold value.

[0068] Among them, the high-pressure gas tank can be a storage tank filled with high-pressure gas.

[0069] A gas compressor can be a compressor that adjusts the gas pressure in a high-pressure gas tank.

[0070] The gas pressure in the passive water tank is kept in balance with the gas pressure in the high-pressure gas tank. Specifically, the gas in the passive water tank can be kept in balance through a pressure balancing pipeline.

[0071] Specifically, when the main feedwater pump is operating normally, the controller can obtain the liquid level of the passive feedwater tank and control the gas compressor to operate based on the numerical difference between the liquid level and the preset height, so that the numerical difference is less than the difference threshold.

[0072] When the main feedwater pump is operating normally, the controller can obtain the liquid level in the passive feedwater tank and a preset liquid level. Based on the difference between the liquid level and the preset level, if the difference indicates the liquid level is greater than the preset level, the controller can increase the output power of the gas compressor, causing the liquid level to decrease under pressure. If the difference indicates the liquid level is equal to the preset level, the controller can maintain the gas compressor's output power. If the difference indicates the liquid level is less than the preset level, the controller can decrease the gas compressor's output power, causing the liquid level to rise under negative pressure.

[0073] Specifically, the controller can obtain the liquid level in the passive water tank and the preset height set for the liquid level.

[0074] When the liquid level is higher than the preset height, the controller can increase the output power of the gas compressor, and the controller can also increase the opening of the water injection pipe isolation valve and the main water supply isolation valve.

[0075] When the liquid level is equal to the preset height, the controller can maintain the output power of the gas compressor, as well as the opening of the water injection pipe isolation valve and the main water supply isolation valve.

[0076] When the liquid level is lower than the preset height, the controller can reduce the output power of the gas compressor, and the controller can also reduce the opening of the water injection pipe isolation valve and the main water supply isolation valve.

[0077] In this embodiment, a high-pressure gas tank is connected to the passive feedwater tank, and the gas pressure in the passive feedwater tank is kept in pressure balance with that in the high-pressure gas tank. A gas compressor is installed on the high-pressure gas tank. When the main feedwater pump is operating normally, the controller acquires the liquid level in the passive feedwater tank and controls the gas compressor to operate based on the difference between the liquid level and a preset height, ensuring that the difference is less than a threshold. Maintaining the total amount of water in the passive feedwater tank is neither too high nor too low. Maintaining a level that is neither too low ensures sufficient water supply time to the steam generator should the main feedwater pump malfunction subsequently. Maintaining a level that is neither too high nor too low avoids the risk of overpressure in the passive feedwater tank.

[0078] In one embodiment, the steam generation system further includes a level measuring probe disposed in a passive water tank. The level measuring probe is used to detect the liquid level in the passive water tank. The controller also controls the valve opening of the water injection pipe isolation valve to stop the passive water tank from supplying water to the steam generator in the event of a main feedwater pump malfunction and the liquid level being below a height threshold.

[0079] Liquid level measuring probes are devices used to measure the height of liquids and are widely used in various industrial and environmental engineering applications. Depending on the specific application and requirements, liquid level measuring probes come in various types and designs.

[0080] When the liquid level is less than the height threshold, it indicates that the liquid level in the passive water tank is close to the bottom. Since the passive water tank is connected to the high-pressure gas tank, in order to prevent nitrogen from the high-pressure gas tank from being injected into the steam generator, the valve opening of the water injection pipe isolation valve is controlled so that the passive water tank stops supplying water to the steam generator.

[0081] Specifically, if the main feedwater pump malfunctions and the liquid level is below the height threshold, the controller can close the water injection pipe isolation valve to stop the passive feedwater supply to the steam generator.

[0082] In this embodiment, a liquid level measuring probe is installed in the passive water tank. The liquid level measuring probe is used to detect the liquid level height in the passive water tank. The controller also controls the valve opening of the water injection pipe isolation valve in the event of a main feedwater pump malfunction and the liquid level height being lower than a height threshold, so that the passive feedwater tank stops supplying water to the steam generator, preventing nitrogen from the high-pressure gas tank from being injected into the steam generator and causing a shutdown.

[0083] In one embodiment, such as Figure 4The schematic diagram of the check valve shown illustrates that the steam generation system also includes: a makeup water check valve located between the main feedwater pump and the passive feedwater tank; and a main feedwater check valve located between the main feedwater pump and the steam generator. The controller is also used to keep both the makeup water check valve and the main feedwater check valve open when the main feedwater pump is operating normally, and to keep both the makeup water check valve and the main feedwater check valve closed when the main feedwater pump malfunctions.

[0084] A check valve, also known as a non-return valve, is a valve used to prevent fluid backflow and is widely used in various piping systems. Its main function is to allow fluid to flow in only one direction while preventing reverse flow. The working principle of a check valve typically relies on mechanisms such as gravity, head difference, or spring pressure to control the opening and closing of the valve.

[0085] The water supply check valve can be a check valve installed between the main feedwater pump and the passive feedwater tank.

[0086] The main feedwater check valve can be a check valve installed between the main feedwater pump and the steam generator.

[0087] Specifically, when the main feedwater pump is functioning normally, both the makeup water check valve and the main feedwater check valve are open, allowing water from the active feedwater tank to flow through both the main and auxiliary feedwater circuits. When the main feedwater pump malfunctions, both the makeup water check valve and the main feedwater check valve are closed, allowing water from the passive feedwater tank to supply water to the steam generator independently.

[0088] In this embodiment, a makeup water check valve is installed between the main feedwater pump and the passive feedwater tank. A main feedwater check valve is installed between the main feedwater pump and the steam generator. Both the makeup water check valve and the main feedwater check valve are open, and in the event of a main feedwater pump malfunction, both are closed. No additional control valves are needed. Because the passive feedwater tank is installed higher than the steam generator, the check valve can automatically close due to the weight of the water, allowing water from the passive feedwater tank to supply water exclusively to the steam generator.

[0089] In one embodiment, such as Figure 5 The schematic diagram of the condensing heat exchange circuit shown includes a steam generator comprising a steam header and a feedwater header. The system also includes condensing heat exchangers connected to both the steam header and the feedwater header. In the event of a main feedwater pump malfunction, the controller activates the condensing heat exchangers to supply water to the feedwater header and to receive the generated steam from the steam header.

[0090] The steam header collects and distributes steam for use in various equipment or systems. The feedwater header receives and distributes water, ensuring that feedwater enters the steam generator evenly for heating. In nuclear power plants, the pressure differential between the steam header and the feedwater header needs to be regulated by the control system to maintain appropriate operating conditions.

[0091] A condensing heat exchanger is a device used to convert gas or steam into liquid. Its working principle is to transfer heat through an exothermic process, converting steam into condensate.

[0092] Specifically, in the event of an abnormality in the main feedwater pump, the controller can control the operation of the condenser heat exchanger to supply water to the feedwater header and receive the generated steam from the steam header.

[0093] In one embodiment, the steam end of the condensing heat exchanger is connected to the steam header via a steam line. The condensate end of the condensing heat exchanger is connected to the feedwater header via a condensate return line.

[0094] In one embodiment, a steam pipe isolation valve may be installed on the steam line. A reflux tank isolation valve may be installed on the condensate return line.

[0095] In this embodiment, the steam generator includes a steam header and a feedwater header. The system also includes a condensing heat exchanger connected to both the steam header and the feedwater header. In the event of a main feedwater pump malfunction, the controller activates the condensing heat exchanger to supply water to the feedwater header and to receive the generated steam from the steam header. Even in the event of a main feedwater pump malfunction, the controller can still activate the condensing heat exchanger to supply water to the feedwater header, thus improving system stability.

[0096] In one embodiment, such as Figure 5 As shown, the steam generation system also includes: a steam pipe isolation valve installed between the steam header and the condensing heat exchanger; and a return pipe isolation valve installed between the condensing heat exchanger and the feedwater header. The controller is also used to control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0097] The steam pipe isolation valve can be an isolation valve installed on the steam line between the steam header and the condensing heat exchanger. The return isolation valve can be an isolation valve installed on the condensate return line between the condensing heat exchanger and the feedwater header.

[0098] Water supply can refer to the flow rate of condensate return line from the condensing heat exchanger. Water supply can also refer to the flow rate in the feedwater header.

[0099] Steam quantity can represent the steam flow rate in the steam line received by the condensing heat exchanger. Steam quantity can also represent the steam flow rate in the steam header.

[0100] Specifically, the controller can control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0101] In one embodiment, the controller acquires the heat exchanger output power of the condenser heat exchanger. The controller then determines the valve opening of the steam pipe isolation valve and the return pipe isolation valve based on the heat exchanger output power.

[0102] In this embodiment, a steam pipe isolation valve is installed between the steam header and the condensing heat exchanger. A return pipe isolation valve is installed between the condensing heat exchanger and the feedwater header. The controller is also used to control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve. This effectively controls the water supply and steam volume, ensuring safe production while improving system stability.

[0103] In one embodiment, such as Figure 6 As shown, the steam generation system also includes a main steam isolation valve connected to the steam header. The main steam isolation valve and the steam pipe isolation valve are in different steam circuits. When the main feedwater pump is operating normally, the controller controls the opening of the main steam isolation valve to allow steam from the steam header to be delivered to the turbine, driving the turbine to generate electricity. When the main feedwater pump malfunctions, the controller controls the opening of the main steam isolation valve to allow steam from the steam header to be delivered to the condensing heat exchanger via the steam pipe isolation valve.

[0104] The main steam isolation valve can be an isolation valve installed in the main steam circuit. The main steam isolation valve is used to control the steam flow rate on the main steam pipeline.

[0105] A turbine can be a type of rotating engine that works by extracting energy from the pressure of a fluid, such as water, steam, or air. Its basic structure includes a rotor and a stator, with blades mounted on the rotor. The fluid acts on the blades to make the rotor rotate and transfer energy.

[0106] Specifically, when the main feedwater pump is functioning normally, the controller can control the opening of the main steam isolation valve to allow steam in the steam header to be delivered to the turbine through the main steam isolation valve, driving the turbine to generate electricity. When the main feedwater pump malfunctions, the controller can control the opening of the main steam isolation valve to allow steam in the steam header to be delivered to the condensing heat exchanger through the steam pipe isolation valve.

[0107] In one embodiment, the steam generation system further includes a safety valve. A main steam isolation valve is connected to the main steam pipeline to control its opening and closing. To prevent overpressure of the steam in the spiral heat exchanger tubes after the main steam isolation valve closes, a safety valve is connected to the main steam pipeline upstream of the main feedwater isolation valve. When the pressure in the pipeline exceeds a specific value, the valve opens, releasing steam and reducing the pressure; when the pressure falls below the specific value, the safety valve closes. The opening and closing pressures of the safety valve can be set according to the characteristics of the reactor.

[0108] In this embodiment, a main steam isolation valve is connected to the steam header. The main steam isolation valve and the steam pipe isolation valve are in different steam circuits. When the main feedwater pump is operating normally, the controller controls the opening of the main steam isolation valve to allow steam from the steam header to be delivered to the turbine, driving the turbine to generate electricity. When the main feedwater pump malfunctions, the controller controls the opening of the main steam isolation valve to allow steam from the steam header to be delivered to the condenser heat exchanger via the steam pipe isolation valve. This ensures that even with a malfunctioning main feedwater pump, the steam generator can still be supplied with water normally, improving system stability.

[0109] In one embodiment, such as Figure 7 As shown, a steam generation method is provided, applied to a controller. The steam generation method includes:

[0110] S702, under normal conditions of the main feedwater pump, controls the main feedwater pump to work so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes the passive feedwater tank.

[0111] The water supply path of the active water supply tank can include the main water supply line and the auxiliary water supply line.

[0112] The main water supply line may include a main water supply pump, a main water supply pipeline, and a steam generator. The auxiliary water supply line may include a main water supply pump, a makeup water pipeline, a passive water supply tank, a water injection pipeline, and a steam generator. Specifically, the auxiliary water supply line may include a main water supply pump, part of the main water supply pipeline, a makeup water pipeline, a passive water supply tank, a water injection pipeline, part of the main water supply pipeline, and a steam generator.

[0113] Specifically, under normal operating conditions, the controller can control the main feedwater pump to supply water to the steam generator along the main feedwater line. The controller can also control the main feedwater pump to supply water to the passive feedwater tank, and the water in the passive feedwater tank flows into the steam generator.

[0114] S704 controls the passive feedwater tank to supply water to the steam generator in the event of an abnormality in the main feedwater pump.

[0115] Among them, the main feed water pump malfunction can indicate that the main feed water pump cannot perform the function of pumping and delivering water. For example, the main feed water pump malfunction can be any of the following: circuit failure of the main feed water pump, power failure of the main feed water pump, or motor damage of the main feed water pump.

[0116] Specifically, in the event of a malfunction in the main feedwater pump, the controller can control the passive feedwater tank to supply water to the steam generator.

[0117] In one embodiment, the controller can control the opening of the water injection pipe isolation valve on the water injection line of the passive feedwater tank, thereby ensuring that the water in the passive feedwater tank flows to the steam generator.

[0118] In one embodiment, to ensure that water in the passive feedwater tank flows to the steam generator and not back to the main feedwater pump, a check valve can be installed between the passive feedwater tank and the main feedwater pump. The check valve is open when the main feedwater pump is operating normally. The check valve is closed when the main feedwater pump malfunctions.

[0119] In the above method, when the main feedwater pump is operating normally, it is controlled to supply water to the steam generator from the active feedwater tank. The feedwater path of the active feedwater tank includes the passive feedwater tank. This ensures that the water temperatures in the passive and active feedwater tanks, as well as the feedwater temperature to the steam generator, remain constant, thus preventing temperature shocks and improving system stability. Conversely, in the event of a main feedwater pump malfunction, the passive feedwater tank is controlled to supply water to the steam generator. Even when the main feedwater pump is shut down, the steam generator can still be supplied with water normally, preventing reactor overheating and further improving system stability.

[0120] In one embodiment, a reactor system is provided, including a steam generation system and a reactor for heating the steam generator.

[0121] The steam generator is a key piece of equipment connecting the reactor and the steam turbine. It generates steam by transferring the heat generated by the nuclear reactor to the secondary side water.

[0122] The steam generator works by using the coolant in the reactor to heat the reactor core, then transferring that heat to the secondary coolant circuit, turning it into steam. Furthermore, in pressurized water reactors, the steam generator is a key device separating the coolant circuit and the secondary circuit, transferring heat from the primary circuit to the secondary circuit via heat transfer tubes, thus turning the water in the secondary circuit into high-temperature steam. Therefore, the steam generator in a reactor system is not only a heat exchange device but also an important component of the entire nuclear power generation process.

[0123] In this embodiment, the reactor heats the steam generator, so that the heat is exchanged into the steam generated by the steam generator, and then the steam drives the turbine to generate electricity.

[0124] In one embodiment, such as Figure 8 The advanced reactor system shown includes:

[0125] The active feedwater tank is connected to the steam generator via the main feedwater pump.

[0126] The passive feedwater tank is connected to the steam generator.

[0127] When the main feedwater pump is operating normally, the controller controls the main feedwater pump to operate, so that the active feedwater tank supplies water to the steam generator. The feedwater path of the active feedwater tank includes the passive feedwater tank.

[0128] In the event of a main feedwater pump malfunction, the controller also controls the passive feedwater tank to supply water to the steam generator.

[0129] An isolation valve for the water injection pipe is installed between the passive feedwater tank and the steam generator.

[0130] A main feedwater isolation valve is installed between the main feedwater pump and the steam generator.

[0131] When the main water supply pump is operating normally, the controller obtains the liquid level of the passive water supply tank and controls the valve opening of the water injection pipe isolation valve and the main water supply isolation valve based on the difference between the liquid level and the preset height, so that the difference is less than the difference threshold.

[0132] For example, to control the flow of the main feedwater pipeline, a main feedwater isolation valve and a main feedwater check valve are connected to the pipeline. The isolation valve can adjust the valve opening to regulate the main feedwater flow rate; the main feedwater check valve prevents the cooling water inside the steam generator from flowing back through the breach in the upstream pipeline. Therefore, the check valve should be installed as close as possible to the steam generator inlet to protect the longest possible length of the main feedwater pipeline.

[0133] The high-pressure gas tank connected to the passive water supply tank maintains pressure balance between the gas pressure in the passive water supply tank and the gas pressure in the high-pressure gas tank.

[0134] A gas compressor installed on a high-pressure gas tank.

[0135] For example, the top of the passive water supply tank is connected to the bottom of the high-pressure gas tank via a pressure balancing pipeline. The high-pressure gas tank is filled with high-pressure nitrogen and can be installed at a height higher than the passive water supply tank. The passive water supply tank is filled with cooling water.

[0136] When the main water pump is operating normally, the controller obtains the liquid level of the passive water tank and controls the gas compressor to operate based on the difference between the liquid level and the preset height, so that the difference is less than the difference threshold.

[0137] A level measuring probe installed in a passive water tank. The level measuring probe is used to detect the liquid level height in the passive water tank.

[0138] In the event of a main feedwater pump malfunction and a liquid level below the height threshold, the controller also controls the valve opening of the water injection pipe isolation valve to stop the passive feedwater tank from supplying water to the steam generator.

[0139] For example, the water injection line is connected between the bottom of the passive water supply tank and the main water supply line, and the connection point with the main water supply line is downstream of the main water supply isolation valve and the main water supply check valve. The diameter of the water injection line is the same as or slightly smaller than that of the main water supply line. To control the on / off state and flow rate of the water injection line, a water injection isolation valve is connected to the line. The opening degree of the isolation valve is adjustable. A liquid level measuring probe is installed at the bottom of the passive water supply tank, which automatically triggers the water injection isolation valve to close when the liquid level inside the tank falls below a certain limit.

[0140] A check valve for water replenishment is installed between the main feedwater pump and the passive feedwater tank.

[0141] A main feedwater check valve is installed between the main feedwater pump and the steam generator.

[0142] For example, the chilled water in the passive feedwater tank comes from the main feedwater pump, and its bottom is connected to the main feedwater pipeline via a makeup water line. This connection is located upstream of the main feedwater isolation valve and the main feedwater check valve. A makeup water check valve is connected to the makeup water line to restrict water flow only from the main feedwater pipe to the makeup water line, preventing backflow and thus preventing water from the passive feedwater tank from flowing back through the makeup water line and out through a vent in the main feedwater pipeline. Therefore, the makeup water check valve should be installed as close as possible to the bottom of the passive feedwater tank, or directly welded to the connection nozzle of the passive feedwater tank. The diameter of the passive feedwater line is much smaller than that of the main feedwater pipeline to limit the flow rate through the makeup water line. The function of the makeup water line is to divert and supplement the main feedwater from the main feedwater pipeline into the passive feedwater tank.

[0143] The system also includes condensing heat exchangers connected to the steam header and the feedwater header, respectively.

[0144] In the event of an abnormality in the main feedwater pump, the controller activates the condenser heat exchanger to supply water to the feedwater header and to receive the generated steam from the steam header.

[0145] A steam pipe isolation valve installed between the steam header and the condensing heat exchanger.

[0146] A return pipe isolation valve is installed between the condenser heat exchanger and the feedwater header.

[0147] The controller is also used to control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0148] Under normal operating conditions, the main pump operates, drawing condensate from the active feedwater tank, pressurizing it, and injecting it into the main feedwater pipeline. The main feedwater isolation valve and the injection pipe isolation valve are both open. The injection pipe isolation valve is at its maximum opening, while the main feedwater isolation valve opening is adjusted as needed. Due to flow resistance in the main feedwater check valve and the main feedwater isolation valve, driven by pressure differential, some main feedwater enters the passive feedwater tank through the makeup water pipeline. By adjusting the pressure in the high-pressure nitrogen tank and the opening of the main feedwater isolation valve using a gas compressor and gas release valve, the water level in the passive feedwater tank is stabilized near the design value, and the pressure in the high-pressure nitrogen tank is also close to the pressure at the main feedwater pump outlet. After the water level stabilizes, the main feedwater entering from the makeup water pipeline mixes with the water in the passive feedwater tank and then flows back to the injection feedwater pipeline through the injection water pipeline. At this time, the flow rate from the water supply line into the passive water supply tank is relatively small, and its main function is to maintain the water temperature in the passive water supply tank at a stable level near the normal main water supply temperature.

[0149] In the event of a plant-wide AC power outage, the main pump stops operating, halting the high-flow main feedwater supply driven by the main pump, resulting in a loss of main feedwater. At this point, the feedwater pressure upstream of the main feedwater check valve and the makeup water check valve rapidly decreases to below the pressure downstream of the check valves, triggering their closure. Simultaneously, after the check valves close, the reduced feedwater flow also lowers the steam generator outlet pressure. Because the initial pressure of the high-pressure nitrogen tank above the passive feedwater tank remains close to the main feedwater pump pressure, the pressure inside the tank is higher than the steam generator inlet pressure. Driven by the high-pressure nitrogen tank pressure, water from the passive feedwater tank is continuously injected into the main feedwater pipeline through the injection line, ensuring uninterrupted main feedwater flow at the steam generator inlet and maintaining a continuous feedwater flow for an extended period. The duration and flow rate of the passive feedwater supply can be adjusted by modifying the water volume in the passive feedwater tank and the volume of the high-pressure nitrogen tank. A liquid level measuring probe is installed at the bottom of the passive water tank. When the liquid level inside the tank is lower than a certain limit, it automatically triggers the water injection pipe isolation valve to close, preventing nitrogen from the high-pressure gas tank from being injected into the steam generator.

[0150] Under normal operating conditions, this advanced reactor transfers the heat generated in the reactor core to the secondary side of the steam generator, converting it into steam energy. At this time, the main feedwater isolation valve, main steam isolation valve, and water injection pipe isolation valve are in the open state, while the steam pipe isolation valve and condensate return pipe isolation valve are in the closed state. The main feedwater pump operates, continuously injecting condensate from the active feedwater tank into the steam generator, continuously absorbing energy from the primary side of the steam generator, and the generated steam is discharged from the main steam pipeline.

[0151] In the event of a reactor accident, such as a plant-wide power outage, the main feedwater pumps will shut down, resulting in an immediate loss of active feedwater. Upon loss of active feedwater, the main feedwater check valve and the makeup water check valve automatically close under differential pressure. Cooling water from the passive makeup water tank is injected into the steam generator under pressure from the high-pressure gas tank, ensuring uninterrupted feedwater flow to the steam generator and continuous removal of reactor heat. Once the low steam generator outlet pressure signal is reached, the main steam isolation valve will close. After the main steam isolation valve closes, the continuous generation of steam in the spiral tube will cause the steam generator outlet pressure to rise. Upon reaching the high pressure signal, the steam pipe isolation valve and the condensate return isolation valve will open, activating the passive residual heat removal system and continuously removing reactor heat. Before the passive waste heat removal system is started, the rapid increase in pressure will cause the OTSG outlet safety valve to open, and high-temperature steam will be discharged from the safety valve to the external environment, forming a heat removal path of: passive feedwater tank - spiral pipe - safety valve - external environment. When the reactor temperature decreases or the passive feedwater tank water source is exhausted, the steam generator pressure drops, the safety valve is isolated, and the passive feedwater system has been started, forming a heat removal path of passive feedwater tank (or condensate return line) - spiral pipe - steam line - condenser heat exchanger - heat trap tank - external environment.

[0152] It is evident that the adoption of a feedwater system combining active and passive methods can continuously supply water to the steam generator after an accident, thereby continuously removing heat from the reactor core, effectively ensuring the continuous removal of heat from the reactor core, preventing the deterioration of ground heat transfer, and improving the safety and reliability of the reactor.

[0153] In this embodiment, the active feedwater tank is connected to the steam generator via the main feedwater pump, and the passive feedwater tank is also connected to the steam generator. Using this system, on the one hand, when the main feedwater pump is operating normally, the controller controls the main feedwater pump to operate, enabling the active feedwater tank to supply water to the steam generator. The feedwater path of the active feedwater tank includes the passive feedwater tank. While the main feedwater pump supplies water to the steam generator, the feedwater path of the active feedwater tank also includes the passive feedwater tank, ensuring that the water temperatures in the passive and active feedwater tanks, as well as the water supply temperature to the steam generator, remain constant, thereby avoiding temperature shocks and improving system stability. On the other hand, the controller also controls the passive feedwater tank to supply water to the steam generator in the event of a main feedwater pump malfunction. Even when the main feedwater pump stops, it can still supply water to the steam generator normally, preventing reactor overheating and further improving system stability.

[0154] The above methods can also bring the following beneficial effects:

[0155] 1) Passive system, requiring no active energy input;

[0156] 2) In the event of a failure of the active feedwater system, and before the secondary side residual heat removal system is started, this system can achieve uninterrupted steam generator water supply and energy removal, ensuring continuous energy removal from the reactor core, avoiding core heat transfer deterioration, and ensuring reactor safety.

[0157] 3) It can replace the water supply tank of the secondary waste heat discharge system and assume the function of water supply for the secondary waste heat discharge system;

[0158] 4) It reduced the potential rise in reactor core temperature during an accident, thus increasing the safety margin;

[0159] 5) It greatly increases the safety and reliability of the reactor.

[0160] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0161] Based on the same inventive concept, this application also provides a steam generating apparatus for implementing the steam generating method described above. The solution provided by this apparatus is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the steam generating apparatus provided below can be found in the limitations of the steam generating method described above, and will not be repeated here.

[0162] In one embodiment, a steam generating device is provided, comprising: a normal water supply module for controlling the main feedwater pump to operate when the main feedwater pump is operating normally, so as to enable the active feedwater tank to supply water to the steam generator; the water supply path of the active feedwater tank includes a passive feedwater tank; and an abnormal water supply module for controlling the passive feedwater tank to supply water to the steam generator when the main feedwater pump is abnormal.

[0163] Each module in the aforementioned steam generator can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0164] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 9 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores water supply path data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When executed by the processor, the computer program implements a steam generation method.

[0165] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0166] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-described method steps.

[0167] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described method steps.

[0168] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the above-described method steps.

[0169] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0170] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0171] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A steam generating system, characterized in that, The system includes an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator, and a controller; The active water tank is connected to the steam generator via the main water pump; The passive water supply tank is connected to the steam generator; When the main feedwater pump is operating normally, the controller controls the main feedwater pump to operate so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes the passive feedwater tank. In the event of an abnormality in the main feedwater pump, the controller can also control the passive feedwater tank to supply water to the steam generator. An isolation valve for the water injection pipe is installed between the passive water supply tank and the steam generator; A high-pressure gas tank connected to the passive water supply tank, wherein the gas pressure in the passive water supply tank and the gas pressure in the high-pressure gas tank are kept in pressure balance; A gas compressor is installed on the high-pressure gas tank; The controller also acquires the liquid level of the passive water tank when the main water pump is working normally, and controls the gas compressor to work based on the numerical difference between the liquid level and the preset height, so that the numerical difference is less than the difference threshold. A liquid level measuring probe is installed in the passive water supply tank; the liquid level measuring probe is used to detect the liquid level height in the passive water supply tank; The controller also controls the valve opening of the water injection pipe isolation valve when the main water pump malfunctions and the liquid level is less than the height threshold, so that the passive water tank stops supplying water to the steam generator.

2. The system according to claim 1, characterized in that, The system also includes: A main feedwater isolation valve is installed between the main feedwater pump and the steam generator; When the main water supply pump is operating normally, the controller obtains the liquid level of the passive water supply tank and controls the valve opening of the water injection pipe isolation valve and the main water supply isolation valve based on the numerical difference between the liquid level and the preset height, so that the numerical difference is less than the difference threshold.

3. The system according to claim 1, characterized in that, The water source for the active feedwater tank is condensate produced by the power plant's condenser after condensing the waste steam from the turbine.

4. The system according to claim 3, characterized in that, The steam generator is a device that produces steam by heating liquid water.

5. The system according to claim 1, characterized in that, The system also includes: A water supply check valve is installed between the main water supply pump and the passive water supply tank; The main feedwater check valve is installed between the main feedwater pump and the steam generator.

6. The system according to claim 1, characterized in that, The steam generator includes a steam header and a feedwater header; The system also includes condensing heat exchangers connected to the steam header and the feedwater header respectively; In the event of an abnormality in the main feedwater pump, the controller controls the condenser heat exchanger to operate, so that the condenser heat exchanger supplies water to the feedwater header, and the condenser heat exchanger receives the generated steam from the steam header.

7. The system according to claim 6, characterized in that, The system also includes: A steam pipe isolation valve is installed between the steam header and the condensing heat exchanger; A return pipe isolation valve is installed between the condenser heat exchanger and the feedwater header; The controller is also used to control the inlet steam flow of the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the outlet water flow of the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

8. The system according to claim 7, characterized in that, The system also includes: A main steam isolation valve connected to the steam header; the main steam isolation valve and the steam pipe isolation valve are in different steam circuits; When the main feedwater pump is operating normally, the controller controls the opening of the main steam isolation valve so that the steam in the steam header is delivered to the turbine through the main steam isolation valve to drive the turbine to generate electricity. In the event of an abnormality in the main feedwater pump, the controller controls the opening of the main steam isolation valve so that steam in the steam header is delivered to the condensing heat exchanger through the steam pipe isolation valve.

9. A method for generating steam, characterized in that, The method, applied to the steam generating system as described in any one of claims 1 to 8, comprises: When the main feedwater pump is operating normally, the main feedwater pump is controlled to operate so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes the passive feedwater tank; The liquid level in the passive water tank is obtained, and the gas compressor is controlled to operate based on the numerical difference between the liquid level and a preset height, so that the numerical difference is less than a difference threshold. In the event of an abnormality in the main feedwater pump, the passive feedwater tank is controlled to supply water to the steam generator; In the event of an abnormality in the main feedwater pump and a liquid level below a height threshold, the valve opening of the water injection pipe isolation valve is controlled to stop the passive feedwater tank from supplying water to the steam generator.

10. A reactor system, characterized in that, It includes a steam generation system as described in any one of claims 1 to 8, and a reactor for heating the steam generator.

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