A passive containment spray and heat removal system
A passive containment and heat exhaust system technology, applied in the field of passive containment spray and heat exhaust systems, can solve problems such as containment failure, and achieve the effect of maintaining integrity and reducing temperature and pressure
Active Publication Date: 2016-11-30
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology
After the power outage of the nuclear power plant, the failure of the active containment spray system and other related accidents, the active containment spray system will fail. failure due to pressure, resulting in release of radioactivity to the environment
Method used
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Embodiment
[0017] In this embodiment, the passive containment spraying and heat removal system is provided with two water supply series, and each series mainly includes three pressurized water tanks (A series C1-C3, B series D1-D3), one normally closed Electric isolation valve (A series H1, B series H2), a check valve (A series J1, B series J2), spray ring pipe and nozzle (A series K1, B series K2), bypass line isolation valve (A series I1, B series I2). For the system flow chart, see figure 1 , the layout diagram of the system is shown in figure 2 .
[0018] The 3 water tanks of each water supply series are connected through a header, which is connected to the spray ring through the containment penetrating piece. The header is equipped with an electric isolation valve outside the containment, and a Check valves as part of the containment isolation system.
[0019] The water tank is a pressurized water tank pressurized with nitrogen, and the nitrogen pressure meets the requirements ...
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The invention belongs to nuclear power design technology, in particular to a passive containment spray and heat removal system. Its structure includes several pressure accumulating water tanks arranged outside the containment, the outlet pipes of the pressure accumulating water tanks are connected to the header, and the header is connected to the spray ring pipe in the containment through the containment penetrating piece, and the collecting pipe outside the containment An electric isolation valve is provided on the pipe, and a check valve is provided on the header in the containment vessel. The present invention can provide spray flow into the containment in the case of a serious accident, effectively reduce the temperature and pressure of the containment, and ensure that the temperature and pressure in the containment are within an acceptable range within 72 hours; it can also The gas in the containment is discharged to the steel water tank, and the temperature and pressure in the containment are reduced to a certain extent through the heat exchange between the outer surface of the water tank and the outside air, and the integrity of the containment is maintained.
Description
technical field [0001] The invention belongs to nuclear power design technology, in particular to a passive containment spray and heat removal system. Background technique [0002] At present, the design of the containment sprinkler system in nuclear power plants adopts an active design. After an accident that causes the pressure and temperature of the containment to rise (loss of water accident or secondary circuit pipeline rupture accident), the active containment sprinkler system is put into operation. . Under design basis accidents, the active containment sprinkler system can limit the pressure and temperature of the containment within the design limits, thereby maintaining the integrity of the containment. [0003] The active containment sprinkler system is designed for design basis accidents, and whether the containment heat removal is effective under severe accident conditions has a great impact on the accident consequences. After the power outage of the nuclear pow...
Claims
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IPC IPC(8): G21C15/18
Inventor 黄伟峰赵德鹏于勇宋代勇赵侠马秀歌贺克羽
Owner CHINA NUCLEAR POWER ENG CO LTD