Fire-fighting water supply method, device and system for compact reactor

Abstract

The invention relates to a fire-fighting water supply method, device and system for a compact reactor. The method comprises the steps that a detected fire event is responded, and a gas jacking module is controlled to be started, so that fire fighting water is output to a fire fighting pipe network through the gas jacking module under the condition that a fire fighting water supply module does not output the fire fighting water; according to a preset water pump starting strategy, all the fire-fighting water pumps in all the fire-fighting water supply units are sequentially controlled to be started, so that fire-fighting water is output to a fire-fighting pipe network through the successfully started fire-fighting water pumps; the preset water pump starting strategy comprises that the fire pump started next time and the fire pump started last time belong to different fire-fighting water supply units, and the fire pumps started at the same time do not contain the fire pumps belonging to the same fire-fighting water supply unit. By adopting the method, the fire-fighting water can be timely and effectively output in the fire window period, the fire extinguishing timeliness of the initial fire is improved, the water supply efficiency of the fire-fighting water pump can be improved, and the situation that the nuclear safety is threatened due to rapid fire development is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fire fighting technology, in particular to a fire fighting water supply method, device and system for a compact reactor. BACKGROUND

[0002] Fire safety involves many fields such as life, building, production, power grid, etc. Taking the power grid field as an example, the power generation system such as nuclear island and compact reactor involves a large number of cable combustibles. When a cable fire occurs, how to quickly implement fire extinguishing to avoid fire spread is crucial to nuclear safety.

[0003] Conventionally, when a cable fire occurs, a fire water pump is usually used to implement fire extinguishing. However, the start of the fire water pump requires a long time, so that before the start of the fire water pump, that is, in the initial stage of the cable fire, fast and effective fire extinguishing cannot be performed, causing the fire to spread and seriously endangering nuclear safety.

[0004] Therefore, how to timely and effectively put out a fire accident in the power grid field is a technical problem to be solved at present. SUMMARY

[0005] Therefore, it is necessary to provide a fire fighting water supply method, device and system for a compact reactor, which can implement effective fire extinguishing in the initial stage of a fire, that is, in the window period of the start of a fire water pump, and quickly start the fire water pump to reduce the time consumption of the start of the fire water pump and improve the effectiveness and timeliness of fire extinguishing.

[0006] In a first aspect, the present application provides a fire fighting water supply method for a compact reactor, applied to a fire fighting water supply system for a compact reactor, the system comprising: a fire fighting water supply module, a fire fighting pipe network and a gas pressure module, the fire fighting water supply module comprising at least two fire fighting water supply units, each fire fighting water supply unit comprising at least two fire water pumps; the method comprising:

[0007] in response to detecting a fire event, controlling the gas pressure module to start to output fire water to the fire fighting pipe network under the condition that the fire fighting water supply module does not output fire water;

[0008] controlling each fire water pump in each fire fighting water supply unit to start in turn according to a preset pump start strategy to output fire water to the fire fighting pipe network through the successfully started fire water pump; the preset pump start strategy comprises that the fire water pump to be started next and the fire water pump to be started last time belong to different fire fighting water supply units, and the multiple fire water pumps to be started at the same time do not comprise the fire water pump belonging to the same fire fighting water supply unit.

[0009] In one embodiment, controlling each fire water pump in each fire fighting water supply unit to start in turn according to the preset pump start strategy comprises:

[0010] controlling the gas pressure boosting module to start up, and then controlling each fire water pump in each fire water supply unit to start up in sequence according to a preset water pump start-up strategy; or

[0011] controlling the gas pressure boosting module to start up, and then controlling each fire water pump in each fire water supply unit to start up in sequence according to a preset water pump start-up strategy; or

[0012] controlling each fire water pump in each fire water supply unit to start up in sequence according to a preset water pump start-up strategy, in a case where the pipe network pressure at the outlet of the fire water supply module is lower than a preset pressure threshold.

[0013] In one of the embodiments, the method of controlling the gas pressure boosting module to start up comprises:

[0014] sending an opening instruction to a first control valve in the gas pressure boosting module, so as to provide compressed gas to a gas pressure tank in the gas pressure boosting module through a high-pressure gas cylinder group in the gas pressure boosting module in a case where the first control valve is switched from a closed state to an open state; the first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group; or

[0015] sending an initial fire extinguishing instruction to a control device in the gas pressure boosting module, so as to instruct the control device to generate and send the opening instruction to the first control valve based on the initial fire extinguishing instruction.

[0016] In one of the embodiments, the method of controlling each fire water pump in each fire water supply unit to start up in sequence according to a preset water pump start-up strategy after the gas pressure boosting module is started up comprises:

[0017] controlling each fire water pump in each fire water supply unit to start up in sequence according to a preset water pump start-up strategy in a case where the first control valve is in the open state.

[0018] In one of the embodiments, the method further comprises:

[0019] controlling the gas pressure boosting module to shut down in a case where a preset shutdown condition is met; the preset shutdown condition comprises at least one of the following: receiving a start-up success signal of a start-up successful fire water pump feedback, the current time being a preset time length end time after the gas pressure boosting module is started up, and detecting that the fire water level of the gas pressure tank is lower than a preset water level.

[0020] In one of the embodiments, the method of controlling the gas pressure boosting module to shut down comprises:

[0021] sending a closing instruction to a second control valve in the gas pressure boosting module, so as to disconnect the passage between the gas pressure tank and the fire pipe network in the gas pressure boosting module; the second control valve is arranged between the gas pressure tank and the fire pipe network; or

[0022] The initial fire extinguishing end instruction is sent to a control device in the gas pressure topping module to instruct the control device to generate and send a closing instruction to the second control valve based on the initial fire extinguishing end instruction.

[0023] In one of the embodiments, the fire water supply module includes a first fire water supply unit and a second fire water supply unit, the first fire water supply unit includes a first fire water pump and a second fire water pump, and the second fire water supply unit includes a third fire water pump and a fourth fire water pump.

[0024] The preset water pump starting strategy includes sequentially starting the first fire water pump, the third fire water pump, the second fire water pump and the fourth fire water pump.

[0025] In the second aspect, the application further provides a fire water supply device of a compact reactor, which is applied to a fire water supply system of the compact reactor, the system including a fire water supply module, a fire pipe network and a gas pressure topping module, the fire water supply module including at least two fire water supply units, each fire water supply unit including at least two fire water pumps; the device including:

[0026] A first control module is configured to control the gas pressure topping module to start to output fire water to the fire pipe network in the case that the fire water supply module does not output fire water in response to detecting a fire event;

[0027] A second control module is configured to sequentially control the fire water pumps in the fire water supply units to start according to a preset water pump starting strategy to output fire water to the fire pipe network through the successfully started fire water pumps; the preset water pump starting strategy includes that the fire water pump to be started next and the fire water pump to be started last time belong to different fire water supply units, and the fire water pumps to be started at the same time do not include the fire water pumps belonging to the same fire water supply unit.

[0028] In the third aspect, the application further provides a fire water supply system of a compact reactor, which includes a fire water supply module, a fire pipe network and a gas pressure topping module, the fire water supply module including at least two fire water supply units, each fire water supply unit including at least two fire water pumps;

[0029] The gas pressure topping module is configured to output fire water to the fire pipe network in the case that the fire water supply module does not output fire water;

[0030] The fire water supply module is configured to sequentially start the fire water pumps in the fire water supply units according to a preset water pump starting strategy to output fire water to the fire pipe network through the successfully started fire water pumps; the preset water pump starting strategy includes that the fire water pump to be started next and the fire water pump to be started last time belong to different fire water supply units, and the fire water pumps to be started at the same time do not include the fire water pumps belonging to the same fire water supply unit.

[0031] In one embodiment, the gas top pressure module comprises a gas pressure tank, a high-pressure cylinder group, a pressure stabilizing air supplement device, a high-pressure air supplement device, a water supplement device, a control device, and a power supply, wherein the gas pressure tank is connected to the high-pressure cylinder group through a first control valve, connected to a fire-fighting pipe network through a second control valve, connected to the pressure stabilizing air supplement device through a third control valve, connected to the water supplement device through a fourth control valve, and the high-pressure cylinder group is connected to the high-pressure air supplement device through a fifth control valve;

[0032] The control device is configured to send an opening instruction to the third control valve when detecting that the gas pressure in the gas pressure tank is lower than a preset pressure stabilizing threshold value;

[0033] The pressure stabilizing air supplement device is configured to supplement air into the gas pressure tank when the third control valve is opened;

[0034] The control device is further configured to send an opening instruction to the fourth control valve when detecting that the fire-fighting water level in the gas pressure tank is lower than a preset water level;

[0035] The water supplement device is configured to supplement water into the gas pressure tank when the fourth control valve is opened;

[0036] The control device is further configured to send an opening instruction to the fifth control valve when detecting that the gas pressure in the high-pressure cylinder group is lower than a preset high-pressure threshold value;

[0037] The high-pressure air supplement device is configured to supplement air into the high-pressure cylinder group when the fifth control valve is opened.

[0038] In a fourth aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the fire-fighting water supply method of the compact reactor in the first aspect when executing the computer program.

[0039] In a fifth aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the fire-fighting water supply method of the compact reactor in the first aspect.

[0040] In a sixth aspect, the present application further provides a computer program product comprising a computer program, wherein the computer program is executed by a processor to implement the steps of the fire-fighting water supply method of the compact reactor in the first aspect.

[0041] The fire-fighting water supply method, device, system, computer device, storage medium and computer program product of the compact reactor, the fire-fighting water supply method is applied to a fire-fighting water supply system of a compact reactor, the system comprises a fire-fighting water supply module, a fire-fighting pipe network and a gas pressure module, the fire-fighting water supply module comprises at least two fire-fighting water supply units, each fire-fighting water supply unit comprises at least two fire-fighting water pumps; the method comprises: in response to detecting a fire event, controlling the gas pressure module to start to output fire-fighting water to the fire-fighting pipe network through the gas pressure module when the fire-fighting water supply module does not output fire-fighting water; according to a preset water pump starting strategy, sequentially controlling each fire-fighting water pump in each fire-fighting water supply unit to start to output fire-fighting water to the fire-fighting pipe network through the successfully started fire-fighting water pump; the preset water pump starting strategy comprises that the next time the fire-fighting water pump is started and the last time the fire-fighting water pump is started belong to different fire-fighting water supply units, and the multiple fire-fighting water pumps started at the same time do not comprise the fire-fighting water pump belonging to the same fire-fighting water supply unit. By using the method, on the one hand, in the fire-fighting empty window period when the fire-fighting water supply module does not output fire-fighting water in the initial stage of the fire, the gas pressure module can timely and effectively output fire-fighting water to quickly implement fire extinguishing and rescue, improve the timeliness of extinguishing the initial fire, and solve the safety hazards such as fire extinguishing not in time and fire spreading caused by the long starting time of the fire-fighting water supply module; on the other hand, by arranging multiple fire-fighting water supply units and multiple fire-fighting water pumps in each fire-fighting water supply unit, by alternately starting the fire-fighting water pumps of different fire-fighting water supply units, the problem of long starting time caused by the total failure of one fire-fighting water pump due to the initial event can be solved, the starting time of the fire-fighting water pump can be greatly shortened by using the water pump starting strategy, the water supply efficiency of the fire-fighting water pump is improved, and thus the threat of rapid development of the fire in the initial stage of the fire to the nuclear safety can be avoided to the greatest extent, the nuclear power fire safety is improved, and the nuclear safety is greatly guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0043] Figure 1 A structural schematic diagram of a fire-fighting water supply system of a compact reactor in an embodiment;

[0044] Figure 2 A structural schematic diagram of a fire-fighting water supply system of a compact reactor in another embodiment;

[0045] Figure 3 A flowchart of a fire-fighting water supply method of a compact reactor in an embodiment;

[0046] Figure 4 a specific structure diagram of a fire-fighting water supply system of a compact reactor in an embodiment;

[0047] Figure 5 a structure block diagram of a fire-fighting water supply device of a compact reactor in an embodiment;

[0048] Figure 6 an internal structure diagram of a computer device in an embodiment.

[0049] Explanation of reference signs:

[0050] 10: fire-fighting water supply system; 11: fire-fighting water supply module; 12: fire-fighting pipe network;

[0051] 13: gas pressure module; 131: gas pressure water tank; 132: high-pressure gas cylinder group;

[0052] 133: pressure stabilizing and air supplementing device; 134: high-pressure air supplementing device; 135: water supplementing device;

[0053] 136: control device; 137: power supply. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0055] Fire safety is related to many fields such as life, building, production and power grid. Taking the power grid field as an example, a nuclear power plant usually includes two parts, i.e. a nuclear island and a conventional island. The nuclear island includes but is not limited to a reactor building, an auxiliary building, a nuclear fuel building and an emergency diesel engine building, etc. A compact nuclear island, which can also be called a compact reactor, usually contains a large amount of cable combustibles. The space in the reactor is narrow, the cable fire has the characteristics of rapid fire, high temperature, large smoke, fast spreading speed and difficult to extinguish, etc. Especially in the initial stage of cable fire, if the fire can be quickly extinguished by water cooling, the fire can be prevented from spreading, which is crucial to nuclear safety.

[0056] In the initial stage of cable fire, such as the fire in the primary loop of a compact reactor, the turbine power supply will be lost, at this time the emergency diesel generator on the compact reactor needs to be started to supply power to the fire extinguishing system. However, due to the existence of starting impact current, the emergency diesel generator usually needs to be started according to different steps, and the first loading step needs to load nuclear safety related equipment, and the second and subsequent steps load fire extinguishing equipment. In addition, the emergency diesel generator itself also needs a certain time to start, and by the time the fire pump is started and powered, the critical time for extinguishing the initial cable fire is often missed. It should be noted that the fire extinguishing system can include a fire water supply system, an automatic sprinkler system, etc.

[0057] When a cable fire occurs in a compact reactor, the fire spreads rapidly, and the fire extinguishing water source needs to be provided at the first time. However, due to the hysteresis of the emergency diesel generator, the fire pump will not be powered immediately, and it is often impossible to quickly provide water for extinguishing the initial cable fire. However, this initial fire period is very urgent, and if the fire cannot be extinguished in time and quickly, the influence of the cable fire may rapidly expand, threatening nuclear safety. That is, from the start of the fire pump to the rated speed operation to provide fire water that meets the design flow and pressure, a certain time is usually required. If the fire can be extinguished in the early stage of the cable fire, before the fire pump is started, it will be beneficial to nuclear safety.

[0058] Based on this, the embodiment of the present application provides a fire water supply system suitable for the initial fire of a compact reactor, which can ensure that the compact reactor in the nuclear field provides fire extinguishing water during the window period from the turbine shutdown power loss caused by the fire to the fire pump powered by the emergency diesel generator and water supply, thereby timely and effectively extinguishing the fire.

[0059] Figure 1 It is a structural schematic diagram of an exemplary fire water supply system of a compact reactor. The fire water supply system 10 includes a fire water supply module 11, a fire pipe network 12 and a gas pressure module 13, wherein the fire water supply module 11 includes at least two fire water supply units, each fire water supply unit includes at least two fire water pumps, and the outlets of the fire water pumps are respectively connected with the fire pipe network 12. Exemplarily, the fire water supply unit can also include an emergency diesel generator and a fire water source.

[0060] The gas top pressure module 13 is configured to output the fire-fighting water to the fire-fighting pipe network 12 when the fire-fighting water supply module 11 does not output the fire-fighting water; the fire-fighting water supply module 11 is configured to start the fire-fighting water pumps in the fire-fighting water supply units in sequence according to a preset water pump starting strategy, so as to output the fire-fighting water to the fire-fighting pipe network 12 through the successfully started fire-fighting water pumps; the preset water pump starting strategy comprises that the fire-fighting water pump started next time and the fire-fighting water pump started last time belong to different fire-fighting water supply units, and the fire-fighting water pumps started at the same time do not comprise the fire-fighting water pumps belonging to the same fire-fighting water supply unit.

[0061] For example, the fire-fighting water supply module 11 can be provided with at least two parallel and identical fire-fighting water supply units, each of which comprises a diesel engine, a fire-fighting water source and at least two fire-fighting water pumps, wherein the fire-fighting water pumps in each fire-fighting water supply unit are connected to the fire-fighting pipe network 12, that is, the fire-fighting water is delivered to the fire-fighting pipe network 12 through the fire-fighting water pumps in the fire-fighting water supply units to extinguish the fire.

[0062] In an optional implementation, the fire-fighting water supply module 11 can comprise a first fire-fighting water supply unit and a second fire-fighting water supply unit, the first fire-fighting water supply unit comprises a first diesel engine, a first fire-fighting water source and at least two fire-fighting water pumps, the water outlets of the fire-fighting water pumps in the first fire-fighting water supply unit are connected to the fire-fighting pipe network 12; the second fire-fighting water supply unit comprises a second diesel engine, a second fire-fighting water source and at least two fire-fighting water pumps, the water outlets of the fire-fighting water pumps in the second fire-fighting water supply unit are connected to the fire-fighting pipe network 12.

[0063] For example, when the fire-fighting water is delivered to the fire-fighting pipe network 12 based on the fire-fighting water supply module 11, the fire-fighting water can be delivered to the fire-fighting pipe network 12 through one or more fire-fighting water supply units in the fire-fighting water supply module 11, and optionally, only one fire-fighting water pump in the fire-fighting water supply unit is allowed to start in the same time period, so that the overloading of the diesel engine bus caused by the simultaneous starting of multiple fire-fighting water pumps can be avoided, and the safety and reliability of the fire-fighting water supply can be improved. For example, the fire-fighting water supply module 11 can alternately deliver the fire-fighting water to the fire-fighting pipe network 12 through one fire-fighting water pump in the first fire-fighting water supply unit or the second fire-fighting water supply unit, or through one fire-fighting water pump in the first fire-fighting water supply unit and one fire-fighting water pump in the second fire-fighting water supply unit.

[0064] In one embodiment, the fire water supply module 11 can include an emergency diesel engine, a fire water source and a fire water pump, when a fire occurs, the emergency diesel engine is started, and the fire water pump is powered by the emergency diesel engine, so that the fire water is obtained from the fire water source and delivered to the fire pipe network 12 when the fire water pump is started and reaches the rated speed; wherein the fire pipe network 12 refers to the pipe network of the fire extinguishing system (including the fire water supply system), which is used to deliver fire water to ensure timely water supply for fire extinguishing. Exemplarily, the fire pipe network 12 can include but is not limited to fire hydrant pipe, automatic sprinkler pipe, connecting valve and the like. When the fire water pump delivers the fire water to the fire pipe network 12, the fire water can be delivered to the fire area through the fire pipe network 12 to implement fire extinguishing.

[0065] Since the fire water supply module 11 needs a certain time from starting to outputting fire water, such as the time when the fire water pump does not completely start to reach the rated number of revolutions and provides fire water, which is called fire window period, therefore, when a fire occurs, such as a fire event is detected, and the fire water supply module 11 does not output fire water, that is, in the fire window period, the gas pressure module 13 in the fire water supply system 10 can provide fire water to effectively extinguish the initial fire.

[0066] Exemplarily, in a normal state, the gas pressure module 13 in the fire water supply system 10 can be used to ensure that the fire pipe network 12 is always in a high pressure state. When a fire occurs and the fire water pump has not started, the gas pressure module 13 in the fire water supply system 10 can provide initial fire water that meets the fire design flow and pressure for the fire scene, so as to quickly extinguish the initial fire and avoid the fire expanding and threatening the nuclear safety.

[0067] In an optional implementation, the gas pressure module 13 can adopt a gas-water separation strategy to separate the gas space from the water space in the gas pressure tank, that is, the compressed gas in the gas space is placed in a special high-pressure cylinder, which greatly reduces the overall volume of the gas pressure module 13, so as to be conveniently arranged on a compact reactor with small space, thereby meeting the miniaturization requirement of the compact reactor. For example, Figure 2As shown, it shows the structural diagram of the fire-fighting water supply system of another compact reactor, for the gas top pressure module 13, which can include a gas pressure tank 131, a high-pressure gas cylinder group 132, a pressure stabilizing air supplement device 133, a high-pressure air supplement device 134, a water supplement device 135, a control device 136 and a power supply 137, wherein the high-pressure gas cylinder group 132 is connected with the first gas inlet of the gas pressure tank 131 through a first control valve, the water outlet of the gas pressure tank 131 is connected with the fire-fighting pipe network 12 through a second control valve, the gas pressure tank 131 is connected with the pressure stabilizing air supplement device 133 through a third control valve, the gas pressure tank 131 is connected with the water supplement device 135 through a fourth control valve, and the high-pressure gas cylinder group 132 is connected with the high-pressure air supplement device 134 through a fifth control valve; the control device 136 is connected with the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the power supply 137 respectively.

[0068] Wherein, the gas top pressure module 13 can include one or more high-pressure gas cylinder groups 132, each high-pressure gas cylinder group 132 can include at least one high-pressure gas cylinder, it should be noted that in the present example, the number of high-pressure gas cylinders in the high-pressure gas cylinder group 131, and the number of gas pressure tanks 131 and the number of high-pressure gas cylinder groups 132 in the gas top pressure module 13 are not specifically required, in actual application, the initial fire-fighting water and fire-fighting design flow, pressure and other requirements can be flexibly selected. In addition, the size and water storage capacity of the gas pressure tank 131 in the present embodiment are not specifically limited, and in actual scenarios, the initial fire-fighting water quantity, plant space size, compactness and miniaturization requirements of the reactor, etc. can be determined, such as the fire-fighting water in the gas pressure tank 131 should at least meet the water demand during the window time when the fire-fighting water supply module does not output fire-fighting water.

[0069] When multiple high-pressure cylinder groups 132 are provided, the multiple high-pressure cylinder groups 132 can be connected in parallel, i.e. the outlet of each high-pressure cylinder group 132 is connected to an outlet pipeline, so as to be connected to the first inlet of the gas pressure tank 131 through the outlet pipeline. When multiple gas pressure tanks 131 are provided, the multiple gas pressure tanks 131 can be connected in parallel, so as to deliver fire-fighting water into the fire-fighting pipeline network 12 through one or more gas pressure tanks 131. When multiple high-pressure cylinder groups 132 and multiple gas pressure tanks 131 are provided at the same time, the high-pressure cylinder groups 132 can be connected to the same or different gas pressure tanks 131, e.g. the first high-pressure cylinder group 132 and the second high-pressure cylinder group 132 can be connected to the first gas pressure tank 131, the third high-pressure cylinder group 132 and the fourth high-pressure cylinder group 132 can be connected to the second gas pressure tank 131, or the four high-pressure cylinder groups 132 can be connected to the two gas pressure tanks 131. In addition, for the case of multiple gas pressure tanks 131, when fire-fighting water supply is performed, one gas pressure tank 131 can be controlled to supply water to the fire-fighting pipeline 12 first, and when the water level of the gas pressure tank 131 is lower than the preset water level and no fire-fighting water is output by the fire-fighting water pump, another gas pressure tank 131 can be controlled to supply water to the fire-fighting pipeline 12; or multiple gas pressure tanks 131 can supply water to the fire-fighting pipeline 12 at the same time.

[0070] Exemplarily, the gas pressure module 13 in the fire-fighting water supply system 10 can input compressed gas into the connected gas pressure tank 131 through the high-pressure cylinder group 132 when a fire occurs and the fire-fighting water supply module 11 does not output fire-fighting water, so as to provide fire-fighting water to the fire-fighting pipeline network 12 through the gas pressure tank 131, thereby achieving effective fire extinguishing in the initial stage of the fire; when the fire-fighting water supply module 11 outputs fire-fighting water, the high-pressure cylinder group 132 can be controlled to stop inputting compressed gas into the gas pressure tank 131, so as to stop the gas pressure tank 131 from providing fire-fighting water to the fire-fighting pipeline network 12; or the gas pressure module 13 can continue to provide fire-fighting water to the fire-fighting pipeline network 12, i.e. the gas pressure module 13 can provide fire-fighting water to the fire-fighting pipeline network 12 at the same time as the fire-fighting water supply module 11.

[0071] Exemplarily, the gas pressure tank 131 in the gas pressure module 13 is filled with a certain volume of initial fire-fighting water, and the high-pressure cylinder group 132 in the gas pressure module 13 can be filled with compressed gas with a preset gauge pressure, such as about 12 MPa. The high-pressure cylinder group 132 can provide sufficient power for the gas pressure tank 131 to send the fire-fighting water in the gas pressure tank 131 out to meet the design fire flow and pressure requirements. Exemplarily, in the normal case where no fire occurs, the passage between the high-pressure cylinder group 132 and the gas pressure tank 131 is not connected, that is, in the standby state where no fire occurs, the first control valve between the gas pressure tank 131 and the high-pressure cylinder group 132 is in a closed state, when a fire event is detected, an opening instruction for the first control valve can be generated, and the first control valve switches from the closed state to the open state under the opening instruction, so as to open rapidly in the early stage of the fire, so that the high-pressure cylinder group 132 can send the fire-fighting water stored in the gas pressure tank 131 into the fire pipe network 12 in the fire window period when the fire-fighting water supply module 11 does not output fire-fighting water.

[0072] For example, in the application scenario of a compact reactor, the compact reactor can be provided with a control center system for online real-time monitoring and remote control of the operating state of each module and device of the compact reactor. Exemplarily, when the fire detection module detects a fire event, it can be fed back to the control center system, and the control center system can respond to the fire event, generate an opening instruction for the first control valve, and send the opening instruction to the first control valve. Exemplarily, the first control valve can be an electromagnetic pneumatic valve arranged at the gas outlet of the high-pressure cylinder group 132. Exemplarily, the control center system can be a nuclear power distributed control system (DCS), hereinafter referred to as DCS system. For a nuclear island or a compact reactor, a control center is usually provided, and a control center system such as a DCS system is configured for the control center to comprehensively monitor and comprehensively control the safe operation of the entire nuclear island or compact reactor.

[0073] Exemplarily, the control center system can also generate a closing instruction for the first control valve to control the first control valve to switch from the open state to the closed state when detecting that the fire water supply module 11 outputs fire water. That is, after the fire water supply module 11 starts and can provide fire water, the gas pressure module 13 can temporarily end the fire rescue task, and a large amount of fire water can be provided to the fire site from the fire water source in the fire water supply module 11. Exemplarily, the control center system can also generate a closing instruction for the first control valve when the fire water supply module 11 does not output fire water, but the fire alarm signal has been canceled. It should be noted that the closing instruction for the first control valve is not limited to being generated in the above-mentioned cases. The control center system can also close the first control valve according to other closing conditions, such as the gas pressure module 13 fails, the fire water level of the gas pressure tank 131 is lower than the preset water level, and the like.

[0074] In this embodiment, the first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group. By controlling the opening and closing of the first control valve, rapid fire extinguishing in the early stage of fire can be achieved. Through the first control valve, remote and automatic control can be achieved, the timeliness of fire rescue and the intelligence of fire extinguishing can be improved, the complexity of human operation can be reduced, and the lag of human operation can be avoided.

[0075] For the gas pressure module 13, it can be in a pressurized state in daily life. The stable pressure ensures that the pressure of the pipe network at the outlet of the fire water pump is 0.1-0.15 MPa higher than the lift of the fire water pump. Exemplarily, the pressure in the gas pressure tank 131 can be maintained by the stable pressure air supply device 133. Optionally, the stable pressure air supply device 133 can be an external low-pressure air compressor or a compact reactor air compression system. The external low-pressure air compressor or the compact reactor air compression system can be connected to another air inlet (such as a second air inlet) of the gas pressure tank 131 to provide stable air pressure to the gas pressure tank 131. In addition, the passage between the gas pressure module 13 and the fire pipe network 12 can be in a conductive state in daily life, that is, the second control valve at the connection between the gas pressure module 13 and the fire pipe network 12 is in an open state in daily life. The second control valve can be an electromagnetic pneumatic valve.

[0076] Exemplarily, the second control valve can be closed after certain closing conditions are met, such as after the effective volume in the gas pressure module 13 is discharged. When the fire-fighting water in the gas pressure tank 131 is discharged, and the water level of the fire-fighting water, which can be referred to as the fire-fighting water level, is lower than the preset water level, the high-pressure gas in the gas pressure tank 131 can pass through the remaining fire-fighting water and enter the fire-fighting pipe network 12, thereby causing certain safety hazards. Therefore, when the water level of the fire-fighting water in the gas pressure tank is lower than the preset water level, a closing instruction for the second control valve can be generated to disconnect the passage between the gas pressure module 13 and the fire-fighting pipe network 12 after the second control valve is closed. Exemplarily, a water level detection device for the gas pressure tank 131 can be provided, which monitors the fire-fighting water level of the gas pressure tank 131 in real time and generates a water level warning signal when the fire-fighting water level of the gas pressure tank 131 is lower than the preset water level, and sends the water level warning signal to the control center system so that the control center system generates a closing instruction for the second control valve; or the water level detection device can also directly generate a closing instruction for the second control valve when the fire-fighting water level of the gas pressure tank 131 is lower than the preset water level.

[0077] For the gas pressure module 13, it can be used for emergency fire extinguishing in the early stage of fire, and the fire-fighting water supply module 11 stops supplying water after the fire-fighting water is output, so as to avoid excessive use of the fire-fighting water in the gas pressure module 13. Therefore, the control center system can also generate a closing instruction for the second control valve when it is detected that the fire-fighting water supply module 11 outputs fire-fighting water.

[0078] Exemplarily, in the case that the fire alarm signal is released, an opening instruction for the second control valve can also be generated to switch the second control valve from the closed state back to the open state, thereby restoring the pressure state of the gas pressure module 13 to meet the daily pipe pressure demand of the fire-fighting pipe network 12.

[0079] In this embodiment, the second control valve is arranged between the gas pressure tank and the fire-fighting pipe network, and the conduction and disconnection between the gas pressure tank and the fire-fighting pipe network can be realized by switching the second control valve. Not only can the rapid fire extinguishing in the early stage of fire be realized, but also the excessive use of emergency fire-fighting water can be avoided, and the safety hazard caused by the high-pressure gas entering the fire-fighting pipe network can be avoided. In addition, through the controllability of the second control valve, remote and automatic control can be realized, the timeliness of fire rescue and the intelligence of fire extinguishing can be improved, the complexity of human operation can be reduced, and the hysteresis of human operation can be avoided.

[0080] Exemplarily, for the pressure stabilizing and air supplementing device 133, the high-pressure air supplementing device 134 and the water supplementing device 135 in the gas top pressure module 13, the output end of the pressure stabilizing and air supplementing device 133 is connected with the second air inlet of the gas pressure tank 131, the output end of the water supplementing device 135 is connected with the water inlet of the gas pressure tank 131, the water inlet of the gas pressure tank 131 is the same as or different from the water outlet of the gas pressure tank 131; the high-pressure air supplementing device 134 is connected with the high-pressure gas cylinder group 132; wherein, the pressure stabilizing and air supplementing device 133 is used for supplementing air into the gas pressure tank 131; the water supplementing device 135 is used for supplementing water into the gas pressure tank 131; the high-pressure air supplementing device 134 is used for supplementing air into the high-pressure gas cylinder group 132.

[0081] Exemplarily, in the case that no fire occurs, the stable pressure in the gas pressure tank 131 can be maintained by the pressure stabilizing and air supplementing device 133, so as to maintain the stable pressure state of the gas top pressure module 13, that is, the pressure of the fire-fighting pipe network 12, more accurately, the pipe network pressure at the outlet of the fire-fighting water pump, is higher than the lift of the fire-fighting water pump, for example, 0.1-0.15 MPa higher than the lift of the fire-fighting water pump. Exemplarily, a third control valve can be arranged between the pressure stabilizing and air supplementing device 133 and the gas pressure tank 131, in the case that the gas pressure of the gas pressure tank 131 is not in the preset pressure range corresponding to the stable pressure state, the third control valve can be controlled to be opened, so as to supplement air into the gas pressure tank 131 by the pressure stabilizing and air supplementing device 133.

[0082] Exemplarily, for the water supplementing device 135, a fourth control valve can be arranged between the water supplementing device 135 and the gas pressure tank 131, in the case that the fire alarm signal is cancelled, the fourth control valve can be controlled to be opened, so as to supplement water into the gas pressure tank 131 by the water supplementing device 135, so as to ensure that the gas pressure tank 131 stores the water amount capable of meeting the fire extinguishing demand in the initial stage of fire. It should be noted that the water inlet of the gas pressure tank 131 can be the same as or different from the water outlet of the gas pressure tank 131, that is, the water inlet and the water outlet of the gas pressure tank 131 can be the same port or two different ports.

[0083] Exemplarily, for the high-pressure air supplementing device 134, a fifth control valve can be arranged between the high-pressure air supplementing device 134 and the high-pressure gas cylinder group 132, of course, the fifth control valve can also not be arranged; after the fire extinguishing operation in the initial stage of fire is performed, the high-pressure gas stored in the high-pressure gas cylinder group 132 is reduced, even insufficient, in the case that the fire alarm signal is cancelled, the fifth control valve can be controlled to be opened, so as to supplement air into the high-pressure gas cylinder group 132 by the high-pressure air supplementing device 134; exemplarily, the high-pressure air supplementing device 134 can be a high-pressure air supplementing air compressor.

[0084] It should be noted that the above control of the pressure stabilizing and air supplementing device 133 (or the third control valve connected with the pressure stabilizing and air supplementing device 133), the water supplementing device 135 (or the fourth control valve connected with the water supplementing device 135), and the high-pressure air supplementing device 134 can be directly or indirectly controlled by the control center system, or can be controlled by other control devices, and the embodiments of the present application do not make specific limitations thereon. In addition, all the control valves involved above can be single control valves, or can be a control valve group composed of multiple control valves of the same type or different types.

[0085] In the embodiments, by arranging the air supplementing device and the water supplementing device for the gas pressure tank and the air supplementing device for the high-pressure gas cylinder group, the continuous and stable working state of the gas pressure module can be met, so that the gas pressure module can timely and reliably provide emergency water supply for the initial fire at any time, to provide emergency fire extinguishing conditions for the initial fire, improve the timeliness of fire extinguishing, thereby delaying or preventing the spread of fire and improving nuclear safety.

[0086] Exemplarily, for the control device 136 and the power supply 137 in the gas pressure module 13, the control device 136 can be electrically connected with at least one of the first control valve, the second control valve, the third control valve, the fourth control valve, and the fifth control valve, and the power supply 137 is connected with a power supply end of the control device 136; the power supply 137 is configured to supply power to the control device 136; and the control device 136 is configured to control at least one of the first control valve, the second control valve, the third control valve, the fourth control valve, and the fifth control valve.

[0087] The control device 136 is configured to send an opening instruction to the third control valve when detecting that the gas pressure in the gas pressure tank 131 is lower than a preset pressure stabilizing threshold; and the pressure stabilizing and air supplementing device 133 is configured to supplement air into the gas pressure tank 131 when the third control valve is opened. The control device 136 is further configured to send an opening instruction to the fourth control valve when detecting that the fire-fighting water level in the gas pressure tank 131 is lower than a preset water level; and the water supplementing device 135 is configured to supplement water into the gas pressure tank 131 when the fourth control valve is opened. The control device 136 is further configured to send an opening instruction to the fifth control valve when detecting that the gas pressure in the high-pressure gas cylinder group 132 is lower than a preset high-pressure threshold; and the high-pressure air supplementing device 134 is configured to supplement air into the high-pressure gas cylinder group 132 when the fifth control valve is opened.

[0088] Exemplarily, inside the gas pressure module 13, a control device 136 for software level control can also be arranged, which can directly control at least one of the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve. In an alternative implementation, the control center system can be in communication connection with the control device 136 inside the gas pressure module 13, and the control center system can indirectly control at least one of the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve through the control device 136. For example, in the case of detecting a fire event, the control center system can generate an initial fire extinguishing instruction based on the fire event, and send the initial fire extinguishing instruction to the control device 136 of the gas pressure module 13. The control device 136 generates an opening instruction for the first control valve in response to the initial fire extinguishing instruction, and sends the opening instruction to the first control valve to control the first control valve to switch from the closed state to the open state, so that the high-pressure cylinder group 132 can input compressed gas to the gas pressure tank 131, thereby sending the fire-fighting water in the gas pressure tank 131 into the fire-fighting pipe network 12 to achieve the fire extinguishing operation on the initial fire.

[0089] Exemplarily, the control device 136 can realize real-time monitoring of the water level of the fire-fighting water in the gas pressure tank 131, and in the case that the fire-fighting water level is lower than the preset water level, or a water level warning signal is received, a closing instruction for the second control valve is generated and sent to the second control valve to control the second control valve to switch from the open state to the closed state, thereby disconnecting the connection between the gas pressure tank 131 and the fire-fighting pipe network 12, avoiding the high-pressure gas entering the fire-fighting pipe network 12 to cause safety hazards, such as causing the pipe of the fire-fighting pipe network to be broken.

[0090] Exemplarily, in the case of detecting that the fire-fighting water supply module outputs fire-fighting water, the control center system can also generate an initial fire extinguishing end instruction, and send the initial fire extinguishing end instruction to the control device 136 of the gas pressure module 13. The control device 136 generates a closing instruction for the second control valve in response to the initial fire extinguishing end instruction, and sends the closing instruction for the second control valve to the second control valve to control the second control valve to switch from the open state to the closed state. Alternatively, the control device 136 can also generate a closing instruction for the first control valve based on the initial fire extinguishing end instruction, and send the closing instruction for the first control valve to the first control valve to control the first control valve to switch from the open state to the closed state, thereby disconnecting the connection between the gas pressure tank 131 and the high-pressure cylinder group 132, i.e. the high-pressure cylinder group 132 stops delivering compressed gas to the gas pressure tank 131.

[0091] Exemplarily, in the case of fire alarm cancellation, the control center system can send a fire alarm cancellation instruction to the control device 136 of the gas pressure module 13, and the control device 136 can generate an opening instruction for at least one of the pressure stabilizing and air supplementing device 133 (or the third control valve), the water supplementing device 135 (or the fourth control valve), and the high-pressure air supplementing device 134 (or the fifth control valve) based on the fire alarm cancellation instruction, so as to supplement air into the air pressure tank 131 through the pressure stabilizing and air supplementing device 133, supplement water into the air pressure tank through the water supplementing device 135, and supplement air into the high-pressure cylinder group 132 through the high-pressure air supplementing device 134. In other implementations, the control device 136 can also detect the air pressure state in the air pressure tank 131 and the fire-fighting water level, and generate an opening instruction for the pressure stabilizing and air supplementing device 133 according to the air pressure state in the air pressure tank 131, or generate an opening instruction for the water supplementing device 135 according to the fire-fighting water level; in addition, the control device 136 can also detect the air pressure state in the high-pressure cylinder group 132, and generate an opening instruction for the high-pressure air supplementing device 134 according to the air pressure state in the high-pressure cylinder group 132.

[0092] In addition, for the power supply in the gas pressure module 13, it can be a storage battery for supplying power to the control device 136. The control device 136 can be a control cabinet, a control device, or the like.

[0093] In the embodiment, by arranging the control device in the gas pressure module, direct control of each component in the gas pressure module is realized, and in addition, the control device can also realize communication connection with the control center system, establish online centralized management in the application scenario, and improve the intelligentization and controllability of fire control in the application scenario.

[0094] The gas pressure module in the fire-fighting water supply system has small volume and occupies small area, can not only meet the miniaturization requirement of the compact reactor, but also meet the fire extinguishing requirement of the initial fire of the compact reactor. In the fire-fighting water supply system, in the fire-fighting empty window period of the fire-fighting water supply module in the initial stage of the fire, the fire-fighting water can be timely and effectively outputted to quickly implement fire extinguishing and rescue, the timeliness of fire extinguishing in the initial stage of the fire is improved, and the safety hidden danger of fire spreading caused by the long starting time of the fire-fighting water supply module is solved. In addition, by arranging multiple pairs of fire-fighting water supply modules, i.e., multiple fire-fighting water supply units, and multiple fire-fighting water pumps under each fire-fighting water supply unit, combined with the water pump starting strategy provided in the embodiment, the problem of long starting time caused by the full failure of one fire-fighting water pump due to the initial event can be solved. The water pump starting strategy can greatly shorten the starting time of the fire-fighting water pump and improve the water supply efficiency of the fire-fighting water pump, so that the threat of rapid development of the fire in the initial stage of the fire to nuclear safety can be avoided to the greatest extent, the nuclear power fire safety is improved, and the nuclear safety is greatly guaranteed.

[0095] In an embodiment, for the fire-fighting water supply system of the compact reactor in the above embodiment, the embodiment of the application further provides a fire-fighting water supply method for the compact reactor applied to the fire-fighting water supply system. The execution subject of the method can be the control center system or the control device for the fire-fighting water supply system. Hereinafter, the method applied to the control center system is taken as an example for illustration. As shown in FIG. 3, the fire-fighting water supply method for the compact reactor comprises the following steps: Figure 3

[0096] Step 301, in response to detecting a fire event, the control gas pressure module is started to output fire water to the fire pipe network through the gas pressure module in the case that the fire-fighting water supply module does not output fire water.

[0097] Step 302, according to a preset pump starting strategy, each fire water pump in each fire-fighting water supply unit is controlled to start in turn to output fire water to the fire pipe network through the successfully started fire water pump.

[0098] The preset pump starting strategy comprises that the next starting fire water pump and the last starting fire water pump belong to different fire-fighting water supply units, and the multiple fire water pumps started at the same time do not comprise the fire water pumps belonging to the same fire-fighting water supply unit.

[0099] Exemplarily, in the case that the fire-fighting water supply module comprises a first fire-fighting water supply unit and a second fire-fighting water supply unit, the first fire-fighting water supply unit comprises a first fire water pump and a second fire water pump, and the second fire-fighting water supply unit comprises a third fire water pump and a fourth fire water pump, the preset pump starting strategy can comprise starting the first fire water pump, the third fire water pump, the second fire water pump and the fourth fire water pump in turn, which can be simply written as 1-3-2-4, or the preset pump starting strategy can also comprise starting 1-4-2-3, 2-4-1-3, 2-3-1-4, 3-1-4-2, 3-2-4-1, 4-2-3-1, 4-1-3-2, etc. in turn.

[0100] Exemplarily, for the compact reactor, the fire detection module can be arranged in different plant houses of the compact reactor respectively. In the case that the fire detection module detects a fire event, the fire detection module reports the fire event to the control center system. The control center system can respond to the detection of the fire event and control the fire-fighting water supply system to implement fire rescue. The control center system can control the gas pressure module and the fire-fighting water supply module in the fire-fighting water supply system to provide fire water to the fire pipe network at the same time. However, the fire water pump in the fire-fighting water supply module needs a certain time from power-on starting to rated revolution and outputting fire water. In this window period, the gas pressure module can quickly output fire water to effectively extinguish the initial fire.​

[0101] Exemplarily, during the window period, the control center system can provide fire water to the fire pipe network by starting the gas pressure module, so as to realize the fire water supply during the window period when the fire water pump does not output fire water. Specifically, the control center system can control the high-pressure gas cylinder group in the gas pressure module to input compressed gas to the gas pressure tank through the first gas inlet, so as to press the fire water in the gas pressure tank to the fire pipe network, thereby realizing rapid fire extinguishing during the initial stage of the fire, i.e., the window period when the fire water pump does not output fire water.

[0102] Exemplarily, in the case where a first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group, the manner of controlling the gas pressure module to start can include: sending an opening instruction to the first control valve in the gas pressure module, so that when the first control valve is switched from a closed state to an open state, the high-pressure gas cylinder group in the gas pressure module provides compressed gas to the gas pressure tank in the gas pressure module; wherein the first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group, and the opening instruction is generated based on the fire event. In the normal case where no fire occurs, the first control valve is in a normally closed state, and when a fire occurs, the first control valve is opened so that the high-pressure gas cylinder group can charge the gas pressure tank, and the fire water in the gas pressure tank is pressed to the fire pipe network by the compressed gas, thereby achieving effective fire extinguishing in the fire room after the nozzle in the fire room breaks.

[0103] Exemplarily, in the case where a control device is arranged inside the gas pressure module, the manner of controlling the gas pressure module to start can further include: sending an initial fire extinguishing instruction to the control device in the gas pressure module, to instruct the control device to generate and send an opening instruction to the first control valve based on the initial fire extinguishing instruction; the initial fire extinguishing instruction is generated based on the fire event. That is, after receiving the fire event reported by the fire detection module, the control center system generates an initial fire extinguishing instruction based on the fire event and sends it to the control device of the gas pressure module. Then, the control device generates an opening instruction for the first control valve based on the initial fire extinguishing instruction and sends it to the first control valve, so that the first control valve is switched from a closed state to an open state, and at this time the high-pressure gas cylinder group can input compressed gas to the gas pressure tank, thereby realizing fire water supply during the initial stage of the fire.

[0104] Exemplarily, for the fire water supply module, the control timing of providing fire water by the fire water supply module to the fire pipe network can include but is not limited to the following: starting the fire water pumps in the fire water supply units in sequence according to a preset water pump starting strategy at the same time of starting the gas pressure module; or starting the fire water pumps in the fire water supply units in sequence according to a preset water pump starting strategy after starting the gas pressure module; or starting the fire water pumps in the fire water supply units in sequence according to a preset water pump starting strategy when the pipe network pressure at the outlet of the fire water supply module is lower than a preset pressure threshold.

[0105] Exemplarily, for the case of starting the fire water supply module after starting the gas pressure module, the control center system can start the fire water pumps in the fire water supply units in sequence according to a preset water pump starting strategy when the first control valve is in an open state.

[0106] The above describes a scheme of quickly extinguishing the initial fire by the gas pressure module to provide fire water in the window period when the fire water pump does not output fire water, and then the gas pressure module can also be closed when the fire water pump outputs fire water. Exemplarily, the control center system can also control the gas pressure module to be closed when a preset closing condition is met, wherein the preset closing condition can include but is not limited to at least one of receiving a start success signal of the fire water pump feedback of the start success, the current time being the preset time length end time after starting the gas pressure module, detecting that the fire water level of the gas pressure tank is lower than a preset water level, etc.

[0107] Exemplarily, the way of controlling the gas pressure module to be closed can include but is not limited to: sending a closing instruction to the second control valve in the gas pressure module to disconnect the passage between the gas pressure tank and the fire pipe network in the gas pressure module; the second control valve is arranged between the gas pressure tank and the fire pipe network; or sending an initial fire extinguishing end instruction to the control device in the gas pressure module to instruct the control device to generate and send a closing instruction to the second control valve based on the initial fire extinguishing end instruction.

[0108] The above specific implementation of the fire water supply method can also refer to the related content described above about the fire water supply system in the above embodiments, which will not be repeated here.

[0109] The above fire-fighting water supply method, in the event of a fire, in response to detecting a fire event, the control gas top pressure module is started, in the case that the fire-fighting water supply module does not output fire-fighting water, the gas top pressure module outputs fire-fighting water to the fire-fighting pipe network; according to the preset water pump starting strategy, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in turn, so as to output fire-fighting water to the fire-fighting pipe network through the successfully started fire-fighting water pump; the preset water pump starting strategy includes that the next starting fire-fighting water pump and the last starting fire-fighting water pump belong to different fire-fighting water supply units, and the multiple fire-fighting water pumps started at the same time do not include the fire-fighting water pumps belonging to the same fire-fighting water supply unit. By using the method, on the one hand, in the fire-fighting window period when the fire-fighting water supply module has not output fire-fighting water at the initial stage of the fire, the gas top pressure module can timely and effectively output fire-fighting water to quickly implement fire extinguishing and rescue, improve the timeliness of extinguishing the initial fire, and solve the safety hazards of fire-fighting not timely and fire spreading caused by long starting time of the fire-fighting water supply module; on the other hand, by setting multiple fire-fighting water supply units, and each fire-fighting water supply unit is provided with multiple fire-fighting water pumps, by alternately starting the fire-fighting water pumps of different fire-fighting water supply units, the problem of long starting time caused by total failure of one fire-fighting water pump due to the initial event can be solved, the starting time of the fire-fighting water pump can be greatly shortened by using the water pump starting strategy, and the water supply efficiency of the fire-fighting water pump is improved, so that the threat of rapid development of fire at the initial stage of the fire to nuclear safety can be avoided to the greatest extent, and the nuclear power fire safety is improved, and the nuclear safety is greatly guaranteed.

[0110] Based on the system structure of the above compact reactor fire-fighting power supply system and the corresponding fire-fighting control method, taking the compact reactor in the nuclear field as an example, for fire disaster, a column of initial events (assuming that the fire causes all the fire-fighting water pumps in the first fire-fighting water supply unit to be unavailable) is superimposed on another column of single faults (1 fire-fighting water pump in the second fire-fighting water supply unit that does not occur fire is unavailable due to fault), therefore, the fire-fighting water pump of the compact reactor in the nuclear field should be configured with at least 4, 2 in each column. Referring to Figure 4 As shown in the figure, taking the compact reactor platform as an example, the fire-fighting water supply module 11 is provided with 4 fire-fighting water pumps, which are distributed in A / B columns, assuming that the A column corresponds to the first fire-fighting water supply unit, and the B column corresponds to the second fire-fighting water supply unit, 2 fire-fighting water pumps in each column, 1 standby for 1 in each column, and 1 standby for 3 in total, wherein 1 fire-fighting water pump can meet the fire-fighting design water volume.

[0111] Assuming that the emergency diesel engine itself needs 12.4s to start, the first loading step needs 10s, and the fire-fighting water pump gets power in the second loading step, when the main power turbine equipment is shut down due to fire and needs to be powered by the emergency diesel engine, the fire-fighting water pump needs to get power at the 22.4s after the turbine is shut down and powered by the emergency diesel engine after the fire occurs.

[0112] Assuming that the most unfavorable situation happens when a fire occurs, the fire disaster is superimposed on the failure of the first fire water pump or the failure of power supply due to the fire or the water pump itself, and the second, third or even fourth fire water pump needs to be switched on. This will delay the start of the fire water pump for a certain period of time, and the fire water pump itself also needs a certain period of time, about 3-8s. Thus, assuming that the first three fire water pumps of the four fire water pumps are all faulty or cannot be powered, the fourth fire water pump can be started to supply water. When a fire occurs, the emergency diesel engine is powered, and the most unfavorable situation is that it takes 12.4+10+8+8+8+8=54.4s to start the water supply. In summary, the fire water pump needs to be powered by the emergency diesel engine about 1min after the fire occurs to provide fire water.

[0113] For a compact reactor in the nuclear field, it is mainly composed of a large number of cable combustibles, and the space in the cabin is small. The fire of the cable has the characteristics of fast and fierce fire, high temperature, large smoke, fast spreading speed, and difficult to extinguish. The fire water cannot be provided until 1min after the fire occurs. In the nuclear power field, such disaster conditions are unacceptable. Based on this, the embodiment of the present application proposes the fire water supply system 10 with the above structure, and proposes a fire water supply strategy suitable for the fire water supply system 10.

[0114] Continuing to refer to Figure 4 shown, wherein module 1 is an A column fire water supply unit, the A column fire water supply unit is composed of one fire water source, two fire water pumps, an A column emergency diesel engine and a pressure switch; module 2 is a B column fire water supply unit, the B column fire water supply unit is composed of one fire water source, two fire water pumps, a B column emergency diesel engine and a pressure switch; module 3 is a fire water pipeline, connected to a fire pipe network; and module 4 is a gas pressure module.

[0115] Module 1 is used to provide fire water, which is mutually backed up with B column, and meets the original event plus single failure, and the A column fire water pump is 1 active and 1 standby. Module 2 is used to provide fire water, which is mutually backed up with A column, and meets the original event plus single failure, and the B column fire water pump is 1 active and 1 standby. Module 3 serves as a medium for conveying fire water. Module 4 provides fire water that meets the fire design flow and pressure required by the most unfavorable point of the compact reactor when the fire causes the turbine to stop and lose power, and provides water for the fire pump through the emergency diesel engine during the fire pump window time.

[0116] Exemplarily, assuming that a cable fire occurs in the compact reactor, causing the turbine power supply to fail, the whole reactor is powered off, which may threaten nuclear safety, at this moment, the emergency diesel engine needs to be started to power the fire pump and then the fire pump is started to supply water. However, from the start of the emergency diesel engine to the power supply of the fire pump, in the worst case, it takes about 1 minute for the pump to start to supply fire-fighting water that meets the fire-fighting design flow and pressure. If there is no water during this period, the cable fire may develop rapidly until it threatens nuclear safety. Based on the above assumption, the fire-fighting water supply system shown in Figure 4 is adopted, that is, the fire-fighting pump and the gas pressure module work together to provide fire-fighting water for the one-loop cabin section.

[0117] Assuming that a cable fire occurs, causing the turbine to stop and lose power, at this time, the initiating event is triggered and a single fault is superimposed, wherein the initiating event is that the cable in the most unfavorable fireproof area of the one-loop cabin section A column catches fire, the fire spreads rapidly, causing the turbine to stop and lose power, and the A column power supply (including the emergency diesel engine power supply) also loses due to the cable fire. At this time, the B column emergency diesel engine cannot be immediately powered on during the starting process. With the rapid development of the fire, the two fire alarm detectors in the burning plant respond quickly, and through the DCS system of the nuclear power (which has a battery power supply and can ensure uninterrupted power supply), the electromagnetic pneumatic valve of the high-pressure cylinder group outlet pipeline of the gas pressure module is interlocked to open to provide power for the gas pressure water tank. The electromagnetic pneumatic valve is powered by the battery matched with the gas pressure module. Due to the baking of the fire, the nozzles in the burning room burst and spray water in a large area. Due to the limitation of the volume of the gas pressure module and the weight center of the compact reactor, the gas pressure module can only provide fire-fighting water for the period when the fire-fighting pump is not started.

[0118] Assuming that the superimposed single fault is a fire pump failure in column B, but the control center is unaware. Due to the pipe network break, the pressure switch value on the fire pump outlet pipe network decreases, and when the pressure switch value on the fire pipe network is low and lasts for 5s, the DCS system controls the fire water supply module to start water supply. At this time, the DCS system does not know which fire pump is in normal working condition, but uses the preset fire water supply strategy to start the fire pump one by one until the fire pipe network pressure reaches the normal value. Exemplarily, the low signal of the pipe network pressure switch value triggers the fire pump A1 start signal through the DCS system, but the fire pump A1 cannot start due to the overall power failure of column A power supply. After a short period of time, the DCS system sends a start signal to the fire pump B1 in column B, but the fire pump B1 cannot start due to the false initial condition of the fire pump B1 failure. Then the DCS system sends a start signal to the fire pump A2 in column A, but the fire pump A2 also cannot start due to the overall power failure of column A power supply caused by fire. After a short period of time, the DCS system sends a start signal to the fire pump B2 in column B, and at this time the fire pump B2 starts successfully to supply fire water to the fire site. At this moment, it has been 12.4+10+5+8+8+8+8=59.4s (see the foregoing analysis) since the emergency diesel engine in column B started and the DCS system sent a start signal to the fire pump B2. About 1min after the fire pump starts to supply fire water to the fire site that meets the design flow and pressure.

[0119] If there is no gas pressure module in the above fire pump starting process. It can be imagined that the cable fire will threaten nuclear safety due to its rapid and fierce fire, high temperature, large smoke, fast spreading speed and difficult to extinguish.

[0120] Due to the capacity limitation of the emergency diesel engine, the number of fire pumps cannot be designed as 4 active and 1 standby, and needs to be designed as 1 active and 1 standby per column. If the two fire pumps in a single column start at the same time, it may cause the emergency power bus current overload under the pre-designed power supply working condition. To avoid the simultaneous start of the two fire pumps in a single column, the embodiment of the present application sets that only one fire pump in the same fire water supply unit is allowed to be in the start state, and sets the following conditions for the start of the fire pump.

[0121] a) Fire pump A1 automatic start condition:

[0122] Condition 1: When the emergency diesel engine power supply unloading instruction (for example, the unloading instruction duration of a certain compact reactor platform is about 12.4s (diesel engine starting time) +10s (first loading step time)=22.4s disappears, and at the same time the low signal of the pressure switch value on the fire pipe network lasts for 5s, the total time is 22.4+5=27.4s, the DCS system sends a low-low (L2) alarm signal of pipe pressure low;

[0123] Condition 2: Fire water pump A2 is not started again;

[0124] Satisfy the above conditions: automatically start fire water pump A1.

[0125] b) Fire water pump B1 automatic start conditions:

[0126] Condition 1: When the pressure switch value on the fire pipe network is low signal, and the total time is 22.4+5+8=35.4s;

[0127] Condition 2: and fire water pump B2 is not started;

[0128] Satisfy the above conditions: automatically start fire water pump B1.

[0129] c) Fire water pump A2 automatic start conditions:

[0130] Condition 1: When the pressure switch value on the fire pipe network is low signal, and the total time is 22.4+5+8+8=43.4s;

[0131] Condition 2: and fire water pump A1 is not started;

[0132] Satisfy the above conditions: automatically start fire water pump A2.

[0133] d) Fire water pump B2 automatic start conditions:

[0134] Condition 1: When the pressure switch value on the fire pipe network is low signal, and the total time is 22.4+5+8+8+8=51.4s;

[0135] Condition 2: and fire water pump B1 is not started;

[0136] Satisfy the above conditions: automatically start fire water pump B2.

[0137] It should be noted that the above fire water pump start conditions are only described as an example and do not limit the start conditions.

[0138] Exemplarily, the control center can remotely manually start the fire-fighting water pump and remotely stop the fire-fighting water pump. The fire-fighting water pump starting and stopping pump result (such as the working state of the fire-fighting water pump) signal can be fed back to the DCS system. The fire-fighting water pump can not be provided with an automatic pump stopping control function, and the pump stopping can be determined by the staff with management authority according to the fire fighting situation. The fire-fighting water pump is configured as 1:3 backup, and one fire-fighting water pump can meet the fire-fighting design flow. Exemplarily, in special cases such as serious conditions such as large fire, one fire-fighting water pump in each of the A and B columns can be allowed to start simultaneously. However, two fire-fighting pumps (A1 and A2) in the A column and two fire-fighting pumps (B1 and B2) in the B column are not allowed to operate simultaneously to avoid overloading of the bus bar caused by simultaneous operation of two fire-fighting pumps in a single column.

[0139] Compared with the water supply strategy of sequentially using multiple fire-fighting water pumps in each fire-fighting water supply unit (such as A1-A2-B1-B2), the above-mentioned water supply strategy of alternately using multiple fire-fighting water supply units (such as A1-B1-A2-B2) can improve the efficiency of fire-fighting water supply. Especially for the initial event such as unavailability of fire-fighting water pumps in the A column, when fire-fighting water pump A1 is unavailable, it is not necessary to try to start fire-fighting water pump A2, but to directly jump to fire-fighting water pump B1 in the B column for rapid water supply.

[0140] In the fire-fighting water supply system provided in the embodiment, not only is a fire-fighting water supply module including at least two fire-fighting water supply units provided, but also a gas pressure module is provided. Through the collaborative work of multiple pairs of fire-fighting water supply modules and gas pressure modules, not only can the rapid fire extinguishing in the early stage of fire be realized, but also the timeliness and reliability of the later fire-fighting water supply can be ensured. For the gas pressure module, the effective volume of the gas pressure tank is determined according to the maximum flow (such as the fire-fighting water amount in 1 min) of the fire-fighting water supply system, and the fire-fighting water provided by the gas pressure module should meet the flow, pressure and other requirements of the water fire extinguishing system of the nuclear safety important cabin section.

[0141] For the fire-fighting water supply method provided in the embodiment, through experimental simulation verification, the method can meet the following design requirements:

[0142] 1. Meet the water supply requirements in the 1 min empty window time of the fire-fighting pump;

[0143] 2. Will not cause two fire-fighting pumps on a diesel engine to operate simultaneously, resulting in overloading of the power supply bus bar.

[0144] In addition, by using the above-mentioned fire-fighting water supply system and fire-fighting water supply method, at least the following technical effects can be achieved:

[0145] 1. Through the compact reactor initial fire fighting water supply system and the corresponding control method, the compact reactor can provide fire fighting water that meets the fire fighting design flow and pressure required by the most unfavorable point of the compact reactor in the fire fighting pump empty window time of the fire caused turbine shutdown power loss, the fire fighting pump power supply by the emergency diesel engine, and the fire fighting pump starting control scheme can also avoid the problem of diesel engine bus overload caused by the simultaneous starting of two fire fighting pumps in single column, the system design eliminates the further expansion of the initial fire threat to nuclear safety, solves the problem of timely starting of the fire fighting pump without overload, and improves the platform fire safety.

[0146] 2. Through the compact reactor initial fire fighting water supply system and the corresponding control method, the gas space of the gas pressure module in the gas pressure tank is optimized and compressed, the compressed gas is concentrated in the high-pressure gas cylinder group with a pressure of 12 MPa (gauge pressure), the size of the gas pressure module is reduced, and it is convenient to place in the compact reactor with small space; due to the reduction of the volume of the gas cylinder, the weight is also reduced, and the saved weight and volume space can be used to install more critical nuclear safety related equipment. The gas space in the gas pressure tank is separated from the water space and placed in a special high-pressure gas cylinder, which greatly reduces the overall volume of the gas pressure module and is more convenient to set in the compact reactor with small space.

[0147] 3. In the case that the time taken by the fire fighting pump to provide water meeting the fire fighting design flow and pressure is less than the time taken by the gas pressure module to provide water meeting the fire fighting design flow and pressure, the gas pressure module can at least meet the fire fighting water required by all fire fighting pumps during the time from starting to outputting the fire fighting water, which can avoid the rapid development of the initial cable fire in the compact reactor threatening nuclear safety, improve the nuclear power fire safety, and greatly ensure nuclear safety.

[0148] It should be understood that although each step in the flowchart involved in each embodiment as described above is displayed in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0149] Based on the same inventive concept, the application further provides a fire-fighting water supply device of a compact reactor for implementing the fire-fighting water supply method of the compact reactor as described above. The device provides a solution to the problem in a similar manner as the implementation solution described in the method above, and therefore the specific limitations in one or more embodiments of the fire-fighting water supply device of the compact reactor provided below can refer to the limitations of the fire-fighting water supply method of the compact reactor described above, which will not be repeated here.

[0150] In one exemplary embodiment, as shown in Figure 5 A fire-fighting water supply device of a compact reactor is provided, which is applied to a fire-fighting water supply system of a compact reactor, the system comprising: a fire-fighting water supply module, a fire-fighting pipe network and a gas pressure module, the fire-fighting water supply module comprising at least two fire-fighting water supply units, each fire-fighting water supply unit comprising at least two fire-fighting water pumps; the device comprising:

[0151] a first control module 501, configured to control the gas pressure module to start to output fire-fighting water to the fire-fighting pipe network through the gas pressure module in the case that the fire-fighting water supply module does not output fire-fighting water in response to detecting a fire event;

[0152] a second control module 502, configured to control the fire-fighting water pumps in the fire-fighting water supply units to start in sequence according to a preset pump starting strategy to output fire-fighting water to the fire-fighting pipe network through the successfully started fire-fighting water pumps; the preset pump starting strategy comprising that the fire-fighting water pump to be started next and the fire-fighting water pump to be started last time belong to different fire-fighting water supply units, and the fire-fighting water pumps to be started at the same time do not include the fire-fighting water pumps belonging to the same fire-fighting water supply unit.

[0153] In one embodiment, the second control module 502 is specifically configured to control the fire-fighting water pumps in the fire-fighting water supply units to start in sequence according to the preset pump starting strategy at the same time when the gas pressure module is controlled to start; or control the fire-fighting water pumps in the fire-fighting water supply units to start in sequence according to the preset pump starting strategy after the gas pressure module is controlled to start; or control the fire-fighting water pumps in the fire-fighting water supply units to start in sequence according to the preset pump starting strategy in the case that the pipe network pressure at the outlet of the fire-fighting water supply module is lower than a preset pressure threshold.

[0154] In one of the embodiments, the first control module 501 is specifically configured to send an opening instruction to a first control valve in the gas pressure boosting module, so that the high-pressure gas cylinder group in the gas pressure boosting module provides compressed gas to the gas pressure tank in the gas pressure boosting module when the first control valve is switched from a closed state to an open state; the first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group; or send an initial fire extinguishing instruction to a control device in the gas pressure boosting module, so as to instruct the control device to generate and send the opening instruction to the first control valve based on the initial fire extinguishing instruction.

[0155] In one of the embodiments, the second control module 502 is specifically configured to control the fire-fighting water pumps in the fire-fighting water supply units to start in sequence according to a preset water pump starting strategy when the first control valve is in the open state.

[0156] In one of the embodiments, the device further comprises:

[0157] The third control module is configured to control the gas pressure boosting module to be closed when a preset closing condition is met; the preset closing condition comprises at least one of the following: a start success signal of the fire-fighting water pump feedback of the start success is received, the current time is the preset time length end time after the gas pressure boosting module is started, and the fire-fighting water level of the gas pressure tank is detected to be lower than the preset water level.

[0158] In one of the embodiments, the third control module is specifically configured to send a closing instruction to a second control valve in the gas pressure boosting module, so as to disconnect the passage between the gas pressure tank and the fire-fighting pipe network in the gas pressure boosting module; the second control valve is arranged between the gas pressure tank and the fire-fighting pipe network; or send an initial fire extinguishing end instruction to a control device in the gas pressure boosting module, so as to instruct the control device to generate and send the closing instruction to the second control valve based on the initial fire extinguishing end instruction.

[0159] In one of the embodiments, the fire-fighting water supply module comprises a first fire-fighting water supply unit and a second fire-fighting water supply unit, the first fire-fighting water supply unit comprises a first fire-fighting water pump and a second fire-fighting water pump, and the second fire-fighting water supply unit comprises a third fire-fighting water pump and a fourth fire-fighting water pump; the preset water pump starting strategy comprises starting the first fire-fighting water pump, the third fire-fighting water pump, the second fire-fighting water pump and the fourth fire-fighting water pump in sequence.

[0160] The above-mentioned modules in the fire-fighting water supply device of the compact reactor can be realized by software, hardware and combinations thereof in whole or in part. The above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above-mentioned modules.

[0161] In an exemplary embodiment, a computer device is provided, which can be equipped with a control center system, and an internal structure diagram thereof can be as shown in FIG. Figure 6 The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to perform wired or wireless communication with external terminals. The wireless communication can be achieved through WIFI, mobile cellular network, near field communication (NFC) or other technologies. The computer program is executed by the processor to implement a fire-fighting water supply method for a compact reactor. The display unit of the computer device is configured to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or can be a key, a trackball or a touchpad arranged on the shell of the computer device, or can be an external keyboard, a touchpad or a mouse, etc.

[0162] Those skilled in the art can understand that Figure 6 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0163] In an exemplary embodiment, a computer device is provided, which includes a memory and a processor, and the memory stores a computer program. The processor executes the computer program to implement the steps of the fire-fighting water supply method for a compact reactor in any of the above embodiments.

[0164] In an exemplary embodiment, a computer device is provided, which includes a memory and a processor, and the memory stores a computer program. The processor executes the computer program to implement the steps of the fire-fighting water supply method for a compact reactor in any of the above embodiments.

[0165] In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the fire-fighting water supply method of the compact reactor in any of the above embodiments.

[0166] It should be noted that the data involved in the present application (including but not limited to data for analysis, stored data, displayed data, etc.) are all authorized information and data, and the collection, use and processing of related data need to comply with relevant regulations.

[0167] It can be understood by those skilled in the art that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiments. Any reference to memory, database or other medium used in the embodiments provided by the present 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 storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0168] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations of technical features do not have contradictions, they shall be considered within the scope of the present disclosure.

[0169] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method of fire-fighting water supply for a compact reactor, characterized by, The application discloses a fire-fighting water supply system applied to a compact reactor, and relates to the technical field of nuclear power plants. In response to detecting a fire event, the gas pressure module is controlled to start, so that the fire-fighting water supply module outputs fire-fighting water to the fire-fighting pipe network through the gas pressure module. According to a preset water pump starting strategy, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence, so that the fire-fighting water is output to the fire-fighting pipe network through the successfully started fire-fighting water pump.

2. The method of claim 1, wherein, The preset water pump starting strategy comprises the following: the fire-fighting water pump started next time belongs to a different fire-fighting water supply unit from the fire-fighting water pump started last time, and the fire-fighting water pumps started at the same time do not comprise the fire-fighting water pump belonging to the same fire-fighting water supply unit. According to the preset water pump starting strategy, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence. At the same time of controlling the gas pressure module to start, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence according to the preset water pump starting strategy. After the gas pressure module is controlled to start, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence according to the preset water pump starting strategy.

3. The method of claim 2, wherein, When the pipe network pressure at the water outlet end of the fire-fighting water supply module is lower than a preset pressure threshold, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence according to the preset water pump starting strategy. The control of the gas pressure module to start comprises the following: sending an opening instruction to a first control valve in the gas pressure module, so that the compressed gas is provided to a gas pressure tank in the gas pressure module through a high-pressure gas cylinder group in the gas pressure module when the first control valve is switched from a closed state to an open state; the first control valve is arranged between the gas pressure tank and the high-pressure gas cylinder group; or sending an initial fire extinguishing instruction to a control device in the gas pressure module, so that the control device generates and sends an opening instruction to the first control valve based on the initial fire extinguishing instruction. When the first control valve is in the open state, each fire-fighting water pump in each fire-fighting water supply unit is controlled to start in sequence according to the preset water pump starting strategy.

4. The method of claim 3, wherein, The method further comprises the following: when a preset closing condition is met, the gas pressure module is controlled to be closed; the preset closing condition comprises at least one of the following: a starting success signal fed back by the successfully started fire-fighting water pump is received, the current time is a preset time length end time after the gas pressure module is started, and the fire-fighting water level of the gas pressure tank is detected to be lower than a preset water level. The control of the gas pressure module to be closed comprises the following:

5. The method according to any one of claims 1-4, characterized in that, ​ ​ 6. The method of claim 5, wherein, ​ sending a closing instruction to a second control valve in the gas pressure topping module to disconnect a passage between a gas pressure tank in the gas pressure topping module and the fire-fighting pipe network; the second control valve is arranged between the gas pressure tank and the fire-fighting pipe network; or sending an initial fire extinguishing end instruction to a control device in the gas pressure topping module to instruct the control device to generate and send a closing instruction to the second control valve based on the initial fire extinguishing end instruction.

7. The method according to any one of claims 1-4, characterized in that, The fire-fighting water supply module includes a first fire-fighting water supply unit and a second fire-fighting water supply unit, the first fire-fighting water supply unit includes a first fire-fighting water pump and a second fire-fighting water pump, and the second fire-fighting water supply unit includes a third fire-fighting water pump and a fourth fire-fighting water pump. The preset water pump starting strategy includes sequentially starting the first fire-fighting water pump, the third fire-fighting water pump, the second fire-fighting water pump, and the fourth fire-fighting water pump.

8. A fire water supply arrangement for a compact reactor, characterized in that A fire-fighting water supply system applied to a compact reactor, the system includes a fire-fighting water supply module, a fire-fighting pipe network, and a gas pressure topping module, the fire-fighting water supply module includes at least two fire-fighting water supply units, each of the fire-fighting water supply units includes at least two fire-fighting water pumps; the device includes: A first control module is configured to control the gas pressure topping module to start to output fire-fighting water to the fire-fighting pipe network in the case that the fire-fighting water supply module does not output fire-fighting water, in response to detecting a fire event; A second control module is configured to sequentially control each of the fire-fighting water pumps in each of the fire-fighting water supply units to start according to a preset water pump starting strategy, to output fire-fighting water to the fire-fighting pipe network through the successfully started fire-fighting water pumps; the preset water pump starting strategy includes that the fire-fighting water pump to be started next and the fire-fighting water pump to be started last time belong to different fire-fighting water supply units, and multiple fire-fighting water pumps to be started at the same time do not include fire-fighting water pumps belonging to the same fire-fighting water supply unit.

9. A fire protection water supply system for a compact reactor, characterized in that The system includes a fire-fighting water supply module, a fire-fighting pipe network, and a gas pressure topping module, the fire-fighting water supply module includes at least two fire-fighting water supply units, each of the fire-fighting water supply units includes at least two fire-fighting water pumps; The gas pressure topping module is configured to output fire-fighting water to the fire-fighting pipe network in the case that the fire-fighting water supply module does not output fire-fighting water; The fire-fighting water supply module is configured to sequentially start each of the fire-fighting water pumps in each of the fire-fighting water supply units according to a preset water pump starting strategy, to output fire-fighting water to the fire-fighting pipe network through the successfully started fire-fighting water pumps; the preset water pump starting strategy includes that the fire-fighting water pump to be started next and the fire-fighting water pump to be started last time belong to different fire-fighting water supply units, and multiple fire-fighting water pumps to be started at the same time do not include fire-fighting water pumps belonging to the same fire-fighting water supply unit.

10. The system of claim 9, wherein, The gas top pressure module comprises a gas pressure water tank, a high-pressure gas cylinder group, a pressure stabilizing air supplement device, a high-pressure air supplement device, a water supplement device, a control device and a power supply, wherein the gas pressure water tank is connected with the high-pressure gas cylinder group through a first control valve, the gas pressure water tank is connected with the fire-fighting pipe network through a second control valve, the gas pressure water tank is connected with the pressure stabilizing air supplement device through a third control valve, the gas pressure water tank is connected with the water supplement device through a fourth control valve, and the high-pressure gas cylinder group is connected with the high-pressure air supplement device through a fifth control valve; The control device is used for sending an opening instruction to the third control valve when detecting that the gas pressure in the gas pressure water tank is lower than a preset pressure stabilizing threshold value; The pressure stabilizing air supplement device is used for supplementing air into the gas pressure water tank when the third control valve is opened; The control device is further used for sending an opening instruction to the fourth control valve when detecting that the fire-fighting water level in the gas pressure water tank is lower than a preset water level; The water supplement device is used for supplementing water into the gas pressure water tank when the fourth control valve is opened; The control device is further used for sending an opening instruction to the fifth control valve when detecting that the gas pressure in the high-pressure gas cylinder group is lower than a preset high-pressure threshold value; The high-pressure air supplement device is used for supplementing air into the high-pressure gas cylinder group when the fifth control valve is opened.

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