Containment Vessel Recirculation Interceptor
An interception device and containment technology, which is applied to the field of full-shell recirculation interception devices, can solve the problems affecting the normal operation of the containment spray system and the safety injection system, the cooling liquid flowing into the containment pit, and the insufficient consideration of blockage risks. Achieve the effect of improving design margin, ensuring normal operation, and reducing debris load
Active Publication Date: 2019-08-13
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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Problems solved by technology
[0003] However, when a dehydration accident occurs, a large number of debris will be produced, such as insulation materials, paint, cement chips, etc., which may flow into the containment pit with the leaked coolant. In order to ensure the safety of the injection system and the containment spray system For the normal operation, it is necessary to set up a pit filter in the containment pit to filter out these debris
However, the latest research shows that the existing pit filter design does not take into account the clogging risk, and the clogging of the pit filter will greatly affect the normal operation of the containment sprinkler system and safety injection system, threatening the safety of nuclear power plants
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[0024] In order to describe the technical content, structural features, and achieved effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0025] Such as Figure 1 to Figure 4 As shown in the figure, the structure of Embodiment 1 of the containment recirculation interception device 100 of the present invention is shown. The containment recirculation interception device 100 is arranged in the pit main body of the containment vessel, and the edge of the pit main body forms An annular channel, in which a pit filter is set, the pit filter occupies a section of the annular channel, the containment recirculation interception device 100 is located at both ends of the pit filter, the safety The height of the shell recirculation interception device 100 is less than the lowest water level in the sump.
[0026] see again figure 1 , the containment recirculation interception device 100 of th...
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The invention discloses a containment vessel recirculation interception device, and the device is disposed in a pit main body of a containment vessel. The height of the device is less than the minimum water level of a pit. The device comprises at least one fixed assembly for intercepting fragments. The modular design reduces the weight of the device, can reduce the machining difficulty, facilitates the disassembly, greatly improves the environment adaptability, effectively reduces the fragment loads of a pit filter screen, reduces the pressure drop of the pit filter screen, and improves the design margin of the pit filter screen.
Description
technical field [0001] The invention relates to safety equipment for a nuclear reactor containment, in particular to a containment recirculation interception device capable of reducing the debris load of a pit filter, reducing the pressure drop of the pit filter, and improving the design margin of the pit filter. Background technique [0002] The containment pit is an important part of the containment sprinkler system and safety injection system of the special safety facility of the PWR nuclear power plant. It is mainly used to collect the reactor coolant leaked from the reactor coolant system and the spray liquid of the containment spray system under the condition of a breach in the main pipe of the reactor coolant system in the containment vessel, and store it in the refueling water tank When the water is exhausted, it will be used as the water source of the safety injection system and the containment spray system to ensure the recirculation operation of the safety injecti...
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IPC IPC(8): G21D3/04
CPCG21D3/04Y02E30/00
Inventor 邵慧超王晓吴伟南金秋
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD