Nuclear power plant normal-high pressure fire water supply system
By using the water pressure formed by the difference between the ground potential of the high-level fire water tank and the yard floor, the problem of failure of the nuclear power plant fire water system in the event of power outage is solved, and the allocation of fire water for nuclear power plant without additional active boosting equipment is achieved. The system and important plant water pumps and circulating water pumps provide continuous water sources, improving the reliability and safety of the unit.
Patent Information
- Application Number
- CN202420743351.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The fire water system of a nuclear power plant fails in the event of a power outage and cannot effectively provide fire water supply, resulting in limited fire extinguishing capacity in the factory.
A normal high-pressure fire water supply system is designed to use the water pressure formed by the difference between the ground potential of the high-level fire water pool and the yard floor, as a water source for the cooling water for the fire water distribution system and important factory water pumps and circulating water pumps.
Without additional dynamic booster equipment, alternative water sources and backup water sources are continuously provided for nuclear power plant fire water distribution systems and important plant water pumps and circulating water pumps, improving the reliability and safety of the unit and saving engineering investment.
Smart Images
Figure CN222477603U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of nuclear power plant fire protection, and in particular relates to a normal high pressure fire protection water supply system for a nuclear power plant. Background Art
[0002] At present, the main function of the plant fire water system (FSW) of a million-kilowatt advanced pressurized water reactor nuclear power unit (for example, ACP1000) is to provide the entire plant with fire water that meets the flow and pressure requirements when a fire occurs. It is the fire water source of the plant fire water distribution system (FSD). However, the fire water system needs to rely on energy to drive the booster equipment to supply water to the fire water distribution system. When the fire water system fails due to a power outage, the plant can only rely on mobile equipment and external fire support to extinguish the fire.
[0003] At the same time, if the important plant water pumps and circulating water pumps lose their shaft seal water, they cannot operate for a long time. The cooling water sources of the shaft seals of the important plant water pumps and circulating water pumps in the plant area are mainly the production water system and the desalted water system. The shaft seal cooling water flowing into the important plant water pumps and circulating water pumps depends on the pressure of the production water system and the desalted water system. However, in the case of power failure in the auxiliary system (BOP) area of the nuclear power plant, the pressure of the production water system and the desalted water system used for the shaft seals of the seawater equipment will be lost. Utility Model Content
[0004] In view of this, the embodiment of the utility model is committed to providing a normal high-pressure fire water supply system for a nuclear power plant, which utilizes the water pressure formed by the potential difference between the high-level fire water tank and the ground as the water source for the nuclear power plant fire water distribution system and important plant water pumps and circulating water pump shaft seal cooling water, so as to solve the problem that the original fire water system will fail under power outage conditions due to the need to rely on energy to drive the booster equipment to supply water to the fire water distribution system.
[0005] The utility model provides a nuclear power plant normal high pressure fire water supply system, which includes a high-level fire water pool, a water replenishment system, a water supply system, a water replenishment pipeline and a water supply pipeline. The high-level fire water pool is connected to the water replenishment system by a water replenishment pipeline. The water replenishment system includes a drinking water system and a living water system and is used as a water source for the high-level fire water pool. The high-level fire water pool is connected to the water supply system by a water supply pipeline. The water supply system includes a fire water distribution system and important plant water pumps and circulating water pump shaft seal cooling water. The water pressure formed by the potential difference between the high-level fire water pool and the ground is used as the water source of the water supply system.
[0006] In the above scheme, the water pressure formed by the potential difference between the high-level fire water pool and the ground is used as an alternative energy source to drive the boost as the water source for the nuclear power plant fire water distribution system and important plant water pumps and circulating water pump shaft seal cooling water, thereby realizing the continuous provision of alternative water sources and backup water sources for the nuclear power plant fire water distribution system and important plant water pumps and circulating water pump shaft seal cooling water without additional active boosting equipment. The nuclear power plant normal high pressure fire water supply system in the embodiment of the utility model replaces the function of the original fire water system, thereby canceling the construction of the fire water system plant water pump room, saving engineering investment, and also improving the reliability and safety of the unit.
[0007] In a specific embodiment of the utility model, the water replenishment system also includes a water replenishment pump room. The water replenishment pump room is connected to the drinking water system and the domestic water system. When the high-level fire water pool needs to be replenished with water, the two water sources of the drinking water system and the domestic water system are collected in the water replenishment pump room, and then pressurized by the water replenishment pump room and transported to the high-level fire water pool through the water replenishment pipeline.
[0008] In a specific embodiment of the utility model, an intelligent non-negative pressure water supply device is provided in the water replenishment pump room. When the high-level fire water pool needs to be replenished with water, the intelligent non-negative pressure water supply device directly supplies at least one water source of the drinking water system and the living water system to the high-level fire water pool by pressurizing.
[0009] In a specific embodiment of the utility model, the nuclear power plant's normal high-pressure fire water supply system also includes a plant control room. A remote liquid level gauge for monitoring the liquid level information of the high-level fire water pool is provided in the high-level fire water pool. The water replenishment system also includes a first electric water replenishment valve and a second electric water replenishment valve. The first electric water replenishment valve is arranged at the water source outlet of the drinking water system. The second electric water replenishment valve is arranged at the water source outlet of the domestic water system. The plant control room is used to receive a signal corresponding to the liquid level information of the high-level fire water pool transmitted by the remote liquid level gauge. When the high-level fire water pool needs to be replenished with water, the plant control room automatically or manually controls the first electric water replenishment valve and / or the second electric water replenishment valve to be opened according to the liquid level information of the high-level fire water pool for replenishment.
[0010] In a specific embodiment of the utility model, the plant control room is provided with an alarm device. The parameters set in the plant control room include the automatic water replenishment level, the termination water replenishment level, the overflow alarm level, the minimum effective liquid level and the minimum alarm level. When the liquid level is at the automatic water replenishment level, the plant control room automatically or manually opens the first electric water replenishment valve and / or the second electric water replenishment valve for water replenishment. When the liquid level rises to the termination water replenishment level, the plant control room automatically or manually closes the first electric water replenishment valve and / or the second electric water replenishment valve to stop water replenishment. When the liquid level rises to the overflow alarm level, the alarm device sounds an alarm so that the management personnel can confirm whether the first electric water replenishment valve and / or the second electric water replenishment valve have been closed. When the liquid level drops to the minimum effective liquid level, the alarm device sounds an alarm so that the management personnel can check whether the control equipment in the water replenishment system is intact and open the first electric water replenishment valve and / or the second electric water replenishment valve in time for water replenishment. When the liquid level drops to the minimum alarm level, the alarm device will sound, so that the management personnel can check whether there is a water leak in the normal high-pressure fire water supply system. After investigation and repair, the first electric water supply valve and / or the second electric water supply valve can be opened to replenish water.
[0011] In a specific embodiment of the utility model, the nuclear power plant high-pressure fire water supply system also includes a plant control room. A first electric water supply valve is provided at one end of the water supply pipeline close to the high-level fire water tank. When the water supply system needs water supply, the plant control room automatically or manually controls the first electric water supply valve to open and supply water.
[0012] In a specific embodiment of the utility model, the nuclear power plant normal high pressure fire water supply system also includes a plant control room. The water supply system also includes a second electric water supply valve and a third electric water supply valve. The second electric water supply valve is arranged at one end of the fire water distribution system close to the high-level fire water tank, and the third electric water supply valve is arranged at one end of the important plant water pump and the circulating water pump shaft seal cooling water close to the high-level fire water tank. When the water supply system needs water supply, the plant control room automatically or manually controls at least one of the second electric water supply valve and the third electric water supply valve to open and supply water.
[0013] In a specific implementation of the utility model, the high-level fire water pool is arranged on a hillside on one side of the nuclear power plant area. The water supply pipeline is laid along the hillside to the top of the high-level fire water pool and is connected to the high-level fire water pool.
[0014] In a specific embodiment of the utility model, the water supply pipeline is laid along the vertical shaft dug in the mountain at the lower end of the high-level fire water tank, and then connected to the comprehensive technical corridor of the nuclear power plant area, and the water supply pipeline is connected to the water supply system in the comprehensive technical corridor.
[0015] In a specific implementation of the utility model, the high-level fire water tank is a reinforced concrete water tank. The water supply pipeline and the water supply pipeline are S30408 stainless steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Shown is a structural schematic diagram of a nuclear power plant normal high pressure fire water supply system provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] like Figure 1 As shown, the normal high-pressure fire water supply system of the nuclear power plant includes a high-level fire water tank 1, a make-up water system 2, a water supply system 3, a make-up water pipeline 4 and a water supply pipeline 5. The high-level fire water tank 1 is connected to the make-up water system 2 by the make-up water pipeline 4. The make-up water system 2 includes a drinking water system 21 and a living water system 22 and is used as a water source for the high-level fire water tank 1. The high-level fire water tank 1 is connected to the water supply system 3 by the water supply pipeline 5. The water supply system 3 includes a fire water distribution system 31 and important plant water pumps and circulating water pump shaft seal cooling water 32. The water pressure formed by the potential difference between the high-level fire water tank 1 and the ground of the field is used as the water source of the water supply system 3.
[0019] It should be noted that the potential difference between the high-level fire water tank 1 and the ground can be set according to actual needs, as long as it can meet the system water supply pressure requirements. On this basis, the embodiment of the utility model does not specifically limit the potential difference between the high-level fire water tank 1 and the ground. For example, the maximum flow rate required for firefighting in the water supply service area of the high-level fire water tank 1 is 150L / s (540m 3 / h), and considering 10-20% design margin, the fire duration is 2h, and the pressure at the pipeline interface should not be less than 0.85Mpa. When used as the third backup water source for important plant water pumps and circulating water pump shaft seal cooling water 32, the design flow rate is 8m 3 / h, design pressure 0.6MPa, continuous water supply time 50h. Therefore, the total effective volume of high-level fire water tank 1 is set to 1600m 3 The outer bottom elevation of the high-level fire water tank 1 is 125.5m, and the height difference with the site is 110m to meet the water supply pressure requirements of the system.
[0020] The material of the high-level fire water pool 1, the pipe material of the water supply pipeline 4, and the pipe material of the water supply pipeline 5 can all be selected according to actual needs. For example, the high-level fire water pool 1 can be made of reinforced concrete, that is, the high-level fire water pool 1 can be a reinforced concrete pool. The pipe material of the water supply pipeline 4 and the water supply pipeline 5 can be stainless steel, for example, the water supply pipeline 4 and the water supply pipeline 5 can be S30408 stainless steel pipes.
[0021] According to the technical solution provided by the embodiment of the utility model, the water pressure formed by the potential difference between the high-level fire water pool 1 and the ground is used as an alternative energy source to drive the boost as the water source for the nuclear power plant fire water distribution system 31 and important plant water pumps and circulating water pump shaft seal cooling water 32, thereby realizing the continuous provision of alternative water sources and backup water sources for the nuclear power plant fire water distribution system 31 and important plant water pumps and circulating water pump shaft seal cooling water 32 without additional active boosting equipment. The nuclear power plant normal high pressure fire water supply system in the embodiment of the utility model replaces the function of the original fire water system, thereby canceling the construction of the fire water system plant water pump room, saving engineering investment, and also improving the reliability and safety of the unit.
[0022] In at least one embodiment of the utility model, the water replenishment system 2 further includes a water replenishment pump room 23. The water replenishment pump room 23 is connected to the drinking water system 21 and the domestic water system 22. When the high-level fire water pool 1 needs water replenishment, the two water sources of the drinking water system 21 and the domestic water system 22 are collected in the water replenishment pump room 23, and then the water is pressurized by the water replenishment pump room 23 and transported to the high-level fire water pool 1 through the water replenishment pipeline 4. In this way, by using the water replenishment pump room 23 to pressurize the water source and then transport it to the high-level fire water pool 1 through the water replenishment pipeline 4, the speed of water source transmission to the high-level fire water pool 1 is faster, which is more conducive to timely and effective fire extinguishing operations.
[0023] In at least one embodiment of the utility model, an intelligent non-negative pressure water supply device is provided in the water replenishment pump room 23. When the high-level fire water pool 1 needs to be replenished with water, the intelligent non-negative pressure water supply device directly supplies water from at least one of the drinking water system 21 and the living water system 22 to the high-level fire water pool 1 by pressurizing. In this way, the intelligent non-negative pressure water supply device can directly absorb water from the drinking water system 21 or the production water system 22, and by making full use of the existing pressure in the pipe network of the drinking water system 21 or the production water system 22, it is realized that water is supplied from the factory area to the high-level fire water pool 1 for replenishment by pressurizing the intelligent non-negative pressure water supply device.
[0024] In at least one embodiment of the utility model, the nuclear power plant's normal high-pressure fire water supply system also includes a plant control room. A remote level gauge 11 for monitoring the liquid level information of the high-level fire water tank is provided in the high-level fire water tank 1. The water replenishment system 2 also includes a first electric water replenishment valve 24 and a second electric water replenishment valve 25. The first electric water replenishment valve is arranged at the water source outlet of the drinking water system 21, and the second electric water replenishment valve 25 is arranged at the water source outlet of the living water system 22. The plant control room is used to receive a signal corresponding to the liquid level information of the high-level fire water tank transmitted by the remote level gauge 11. When the high-level fire water tank 1 needs to be replenished with water, the plant control room automatically or manually controls the first electric water replenishment valve 24 and / or the second electric water replenishment valve 25 to be opened according to the liquid level information of the high-level fire water tank for replenishment. In this way, by adding a plant control room, a remote liquid level gauge 11, a first electric water supply valve 24 and a second electric water supply valve 25, the nuclear power plant's normal high-pressure fire water supply system is made more intelligent and automated, and remote control of the nuclear power plant's normal high-pressure fire water supply system is achieved, which saves manpower, avoids casualties of rescue personnel, and improves fire rescue efficiency.
[0025] In at least one embodiment of the utility model, the plant control room is provided with an alarm device. The parameters set in the plant control room include the automatic water replenishment level H, the termination water replenishment level H1, the overflow alarm level H2, the minimum effective liquid level L and the minimum alarm level L1. When the liquid level is at the automatic water replenishment level H, the plant control room automatically or manually opens the first electric water replenishment valve 24 and / or the second electric water replenishment valve 25 for water replenishment. When the liquid level rises to the termination water replenishment level H1, the plant control room automatically or manually closes the first electric water replenishment valve 24 and / or the second electric water replenishment valve 25 to stop water replenishment. When the liquid level rises to the overflow alarm level H2, the alarm device alarms so that the management personnel can confirm whether the first electric water replenishment valve 24 and / or the second electric water replenishment valve 25 have been closed. When the liquid level drops to the minimum effective liquid level L, the alarm device alarms so that the management personnel can check whether the control equipment in the water replenishment system 2 is intact and open the first electric water replenishment valve 24 and / or the second electric water replenishment valve 25 in time for water replenishment. When the liquid level drops to the minimum alarm level, the alarm device will sound an alarm so that the management personnel can check whether there is water leakage in the normal high-pressure fire water supply system. After checking and repairing, the first electric water supply valve 24 and / or the second electric water supply valve 25 can be opened to replenish water. In this way, by setting the automatic water replenishment level H, the termination water replenishment level H1, the overflow alarm level H2, the minimum effective level L and the minimum alarm level L1, the plant control room can replenish water more intelligently and timely according to the actual situation of the liquid level and find the fault problem of the normal high-pressure fire water supply system, which ensures the long-term effectiveness of the normal high-pressure fire water supply system, avoids the problem of untimely fire rescue caused by the failure of the normal high-pressure fire water supply system or untimely water replenishment when it is needed, and further improves the efficiency of fire rescue.
[0026] In at least one embodiment of the utility model, the nuclear power plant's normal high-pressure fire water supply system also includes a plant control room. A first electric water supply valve 12 is provided at one end of the water supply pipeline 5 close to the high-level fire water tank 1. When the water supply system 3 needs water supply, the plant control room automatically or manually controls the first electric water supply valve 12 to open and supply water. In this way, by adding a plant control room and the first electric water supply valve 12, the water supply process of the water supply system 3 is made more intelligent and automated, and remote water supply operation control is also realized, which further saves manpower and improves the efficiency of fire rescue.
[0027] In at least one embodiment of the utility model, the nuclear power plant's normal high-pressure fire water supply system also includes a plant control room. The water supply system 3 also includes a second electric water supply valve 33 and a third electric water supply valve 34. The second electric water supply valve 33 is arranged at one end of the fire water distribution system 31 close to the high-level fire water tank 1, and the third electric water supply valve 34 is arranged at one end of the important plant water pump and the circulating water pump shaft seal cooling water 32 close to the high-level fire water tank 1. When the water supply system 3 needs water supply, the plant control room automatically or manually controls at least one of the second electric water supply valve 33 and the third electric water supply valve 34 to open and supply water. In this way, by adding the second electric water supply valve 33 and the third electric water supply valve 34, the plant control room can automatically or manually control at least one of the second electric water supply valve 33 and the third electric water supply valve 34 to open and supply water according to the actual required water supply requirements.
[0028] In at least one embodiment of the utility model, the high-level fire water pool 1 is arranged on a hillside on one side of the nuclear power plant area. The water supply pipeline 4 is laid along the hillside to the top of the high-level fire water pool 1 and is connected to the high-level fire water pool 1. In this way, by taking advantage of the terrain to set up the high-level fire water pool 1 on the hillside, the water pressure formed by the potential difference is used to replace the energy drive boost to provide water for the nuclear power plant fire water distribution system 31 and important plant water pumps and circulating water pump shaft seal cooling water 32, thereby reducing the construction of the plant water pump room supporting the fire water system, saving investment, saving site area, improving the unit accident mitigation capability, and further improving the safety and stability of the nuclear power unit.
[0029] For example, the water replenishment system 2 has two water sources, the drinking water system 21 and the production water system 22. A pipe with a specification of DN250 is led out from the drinking water system 21 and the living water system 22 on the pipeline in the comprehensive technical corridor to the water replenishment pump room 23. The pipe material is preferably S30408 stainless steel pipe, and the connection method can be welding connection. The first electric water replenishment valve 24 and the second electric water replenishment valve 25 are respectively set on the two led-out pipes. The first electric water replenishment valve 24 and the second electric water replenishment valve 25 are automatically or manually controlled by the plant control room to select the water supply source of the water supply system 3. The drinking water system 21 is the first water source, and the production water system 22 is the backup water source. When the drinking water system 21 fails, the production water system 22 supplies water to the high-level fire water pool 1. The other end of the water replenishment pump room 23 is connected to a water replenishment pipeline 4 with a specification of DN350. The pipe material is preferably S30408 stainless steel pipe, and the connection method is preferably welding connection. The water supply pipeline 4 is laid along the hillside to the top of the high-level fire water tank 1 and is connected to the high-level fire water tank 1.
[0030] In at least one embodiment of the utility model, the water supply pipeline 5 is laid along the vertical shaft dug in the mountain at the lower end of the high-position fire water pool 1, and then connected to the comprehensive technical corridor of the nuclear power plant area, and the water supply pipeline 5 is connected with the water supply system 3 in the comprehensive technical corridor. In this way, without changing the original nuclear power plant area layout too much, by making full use of the structure of the mountain to lay out the water supply pipeline 5 and connect the water supply pipeline 5 with the water supply system 3, it is realized that the water pressure formed by the potential difference is used to replace the energy-driven boosting to provide water sources for the nuclear power plant fire water distribution system 31 and the important plant water pumps and circulating water pump shaft seal cooling water 32, the overall construction is simple, and the project investment is saved.
[0031] For example, a water supply pipeline 5 with a specification of DN350 can be led out from the bottom of the high-level fire water tank 1. A first electric water supply valve 12 is provided near the high-level fire water tank 1 on the water supply pipeline 5. When the water supply system 3 needs water supply, the first electric water supply valve 12 is automatically or manually controlled by the plant control room to supply water. The water supply system 3 consists of a fire water distribution system 31 and important plant water pumps and circulating water pump shaft seal cooling water 32. The water supply pipeline 5 is connected to the fire water distribution system 31 and the important plant water pumps and circulating water pump shaft seal cooling water 32 network pipes in the comprehensive technical corridor. The connection method is preferably welding connection, and a second electric water supply valve 33 and a third electric water supply valve 34 are respectively provided at the front end of the interface. The second electric water supply valve 33 and the third electric water supply valve 34 are automatically or manually controlled by the plant control room to select the water supply path.
[0032] It should be noted that the combination of the various technical features in the embodiments of the present invention is not limited to the combination recorded in the embodiments of the present invention or the combination recorded in the specific embodiments. All technical features recorded in the present invention can be freely combined or combined in any way unless there is a contradiction between them.
[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A nuclear power plant high-pressure fire water supply system, characterized in that: It includes high-level fire water tank, water replenishment system, water supply system, water replenishment pipeline and water supply pipeline, among which: The high-position fire water pool is connected to the water replenishment system by the water replenishment pipeline, and the water replenishment system includes a drinking water system and a living water system and is used as a water source for the high-position fire water pool; The high-level fire water tank is connected to the water supply system by the water supply pipeline. The water supply system includes a fire water distribution system and important plant water pumps and circulating water pump shaft seal cooling water. The water pressure formed by the potential difference between the high-level fire water tank and the ground surface is used as the water source of the water supply system.
2. The nuclear power plant normal high pressure fire water supply system according to claim 1, characterized in that: The water replenishment system also includes a water replenishment pump room, which is connected to the drinking water system and the domestic water system. When the high-level fire water tank needs to be replenished with water, the two water sources of the drinking water system and the domestic water system are collected in the water replenishment pump room, which is then pressurized by the water replenishment pump room and transported to the high-level fire water tank through the water replenishment pipeline.
3. The nuclear power plant normal high pressure fire water supply system according to claim 2, characterized in that: The water replenishment pump room is equipped with an intelligent non-negative pressure water supply equipment. When the high-level fire water tank needs to be replenished with water, the intelligent non-negative pressure water supply equipment directly supplies water from at least one of the drinking water system and the living water system to the high-level fire water tank by pressurizing.
4. The nuclear power plant normal high pressure fire water supply system according to claim 1, characterized in that: It also includes the plant control room, where The high-level fire water tank is provided with a remote level meter for monitoring the liquid level information of the high-level fire water tank. The water replenishment system also includes a first electric water replenishment valve and a second electric water replenishment valve. The first electric water replenishment valve is arranged at the water source outlet of the drinking water system, and the second electric water replenishment valve is arranged at the water source outlet of the living water system. The plant control room is used to receive the signal corresponding to the liquid level information of the high-level fire water tank transmitted by the remote liquid level meter. When the high-level fire water tank needs to be replenished with water, the plant control room automatically or manually controls the first electric water replenishment valve and / or the second electric water replenishment valve to open and replenish water according to the liquid level information of the high-level fire water tank.
5. The nuclear power plant normal high pressure fire water supply system according to claim 4, characterized in that: The plant control room is equipped with an alarm device. The parameters set in the plant control room include automatic water replenishment level, water replenishment termination level, overflow alarm level, minimum effective level and minimum alarm level. Among them, when the liquid level is at the automatic water replenishment level, the plant control room automatically or manually opens the first electric water replenishment valve and / or the second electric water replenishment valve for water replenishment; when the liquid level rises to the termination water replenishment level, the plant control room automatically or manually closes the first electric water replenishment valve and / or the second electric water replenishment valve to stop water replenishment; when the liquid level rises to the overflow alarm level, the alarm device alarms so that the management personnel can confirm whether the first electric water replenishment valve and / or the second electric water replenishment valve have been closed; when the liquid level drops to the minimum effective level, the alarm device alarms so that the management personnel can check whether the control equipment in the water replenishment system is intact and open the first electric water replenishment valve and / or the second electric water replenishment valve in time for water replenishment; when the liquid level drops to the minimum alarm level, the alarm device alarms so that the management personnel can check whether there is water leakage in the normal high-pressure fire water supply system, and open the first electric water replenishment valve and / or the second electric water replenishment valve for water replenishment after investigation and repair.
6. The nuclear power plant normal high pressure fire water supply system according to claim 1, characterized in that: It also includes the plant control room, where A first electric water supply valve is provided at one end of the water supply pipeline close to the high-level fire water tank. When the water supply system needs water supply, the plant control room automatically or manually controls the first electric water supply valve to open and supply water.
7. The nuclear power plant normal high pressure fire water supply system according to claim 1, characterized in that: It also includes the plant control room, where The water supply system also includes a second electric water supply valve and a third electric water supply valve. The second electric water supply valve is arranged at one end of the fire water distribution system close to the high-level fire water tank, and the third electric water supply valve is arranged at one end of the important plant water pump and circulating water pump shaft seal cooling water close to the high-level fire water tank. When the water supply system needs water supply, the plant control room automatically or manually controls at least one of the second electric water supply valve and the third electric water supply valve to be opened for water supply.
8. The nuclear power plant normal high pressure fire water supply system according to any one of claims 1 to 7, characterized in that: The high-level fire water pool is arranged on a hillside on one side of the nuclear power plant area, and the water supply pipeline is laid along the hillside to the top of the high-level fire water pool and is connected with the high-level fire water pool.
9. The nuclear power plant normal high pressure fire water supply system according to claim 8, characterized in that: The water supply pipeline is laid along the vertical shaft dug in the mountain at the lower end of the high-level fire water tank, and then connected to the comprehensive technical corridor of the nuclear power plant area, and the water supply pipeline is connected with the water supply system in the comprehensive technical corridor.
10. The nuclear power plant normal high pressure fire water supply system according to any one of claims 1 to 7, characterized in that: The high-level fire water tank is a reinforced concrete water tank, and the water replenishment pipeline and the water supply pipeline are S30408 stainless steel pipes.