A device for retaining molten matter outside the nuclear power plant after an accident

A technology for core melt and nuclear power plants, applied in nuclear power generation, emergency protection devices, nuclear engineering, etc., can solve problems such as IVR powerlessness, and achieve the effects of improving high safety, preventing a large amount of radioactivity from leaking, and preventing direct heating

Active Publication Date: 2016-01-27
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that once the core melt melts through the pressure vessel, the IVR will be powerless

Method used

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  • A device for retaining molten matter outside the nuclear power plant after an accident

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0019] The present invention includes a pressure vessel 1 , an outer wall 3 , an inner wall 9 , a reactor core melt retention device 5 , and a deflector 4 .

[0020] The inner wall 9 is closed around and open up and down, and the inner side of the inner wall 9 is poured with concrete to fix the steam channel wall 10 with the bottom opening. The pressure vessel 1 is supported by pipes in the vapor channel wall 10 . A steam rising channel 8 is formed between the pressure vessel 1 and the steam channel wall 10 .

[0021] The core melt retention device 5 is fixed on the bottom of the inner wall 9 by pouring concrete. A coolant channel is provided between the inner wall 9 and the core melt retention device 5 . The core melt retention device 5 is composed of inorganic non-metallic refractory materials that can withstand the upper limit temperatur...

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Abstract

An apparatus for retention of molten material for a Generation IV reactor after a nuclear power plant accident comprises an inner wall which is peripherally closed, a vapor channel wall with an opening at the bottom fixed in the inner side of the inner wall, a pressure vessel disposed in the vapor channel wall, a vapor rising channel formed between the pressure vessel and the vapor channel wall, and it further comprises an outer wall surrounding the inner wall, a core molten material retention apparatus fixed at the bottom of the inner wall, and a deflector keeping away from the inner wall and the core molten material retention apparatus to form a gap; wherein a coolant falling channel is formed between the outer wall and the deflector, a coolant inlet is disposed at the bottom of the deflector, and a coolant channel is disposed between the inner wall and the core molten material retention apparatus; a core molten material retention recess is disposed at the upper surface of the core molten material retention apparatus, and the lower surface of the core molten material retention apparatus is arch-shaped; the core molten material retention apparatus is made of non-metal inorganic fireproof material. The invention adopts the design of molten material retention outside the reactor, using different material containing molten material and cooling the molten material by coolant cycle and the deflector structure, thus to improve the safety of the nuclear power plant.

Description

technical field [0001] The invention relates to a device for retaining molten matter outside a nuclear power plant after an accident, in particular to a device for retaining molten matter outside a nuclear power plant after an accident by adopting a completely passive cooling design of the core to improve the safety of the nuclear power plant. Background technique [0002] Molten retention technology is an important mitigation measure for nuclear power to deal with severe accidents, which can effectively solve the radioactive release and maintain the integrity of the safety boundary. At present, the third-generation nuclear power plants have adopted severe accident mitigation measures after the pressure vessel is damaged. [0003] AP-1000 adopts passive measures for preventing and mitigating severe accidents, mainly including setting up a molten core retention facility (IVR). The space between the outer wall of the vessel and the heat insulation layer of the reactor pit is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C9/00G21C9/02
CPCG21C9/016G21C13/02Y02E30/30
Inventor 郑明光叶成顾国兴严锦泉叶元伟史国宝陈松曹克美
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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