Type-IV out-of-core melt retention device after nuclear power station accidents

A core melt, nuclear power plant technology, used in nuclear power generation, emergency protection devices, nuclear engineering, etc., can solve the problem of IVR inability to do anything, and achieve the effect of improving high integrity, maintaining integrity, and preventing direct heating

Active Publication Date: 2013-10-30
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Summary
  • 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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  • Type-IV out-of-core melt retention device after nuclear power station accidents

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Embodiment Construction

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

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

[0020] The inner wall 9 is closed around and opened up and down, and the inner side of the inner wall 9 is fixed with a steam channel wall 10 with an open bottom through concrete pouring. The pressure vessel 1 is placed in the steam channel wall 10 by means of pipe support. 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 to the bottom of the inner wall 9 by concrete casting. A coolant channel is provided between the inner wall 9 and the core melt retention device 5 . The reactor core melt retention device 5 is composed of inorganic non-metallic refractory materials that can withstand an upper limit ...

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Abstract

The invention relates to a Type-IV out-of-core melt retention device after nuclear power station accidents, which comprises an inner wall, a steam channel wall with an opening on the bottom, a pressure container, an outer wall, a reactor core melt retention device and a guide plate, wherein the steam channel wall is fixed on the inner side of the inner wall, the pressure container is arranged in the steam channel wall, the outer wall is arranged around the outside of the inner wall, the reactor core melt retention device is fixed on the bottom of the inner wall, and the guide plate keeps a certain clearance with the inner wall and the reactor core melt retention device; a coolant descending channel is formed between the outer wall and the guide plate, the bottom of the guide plate is provided with a coolant inlet, and a coolant channel is arranged between the inner wall and the reactor core melt retention device; the reactor core melt retention device is provided with a reactor core melt retention groove, and the lower surface of the reactor core melt retention device is arched; and the reactor core melt retention device is prepared from an inorganic non-metallic refractory material. By adopting the out-of-core melt retention design, the melt is contained by different materials, and the structure of the coolant loop and guide plate is used for cooling the melt, thereby enhancing the safety of the nuclear power station.

Description

technical field [0001] The invention relates to an IV-type out-of-core smelt retention device after a nuclear power plant accident, in particular to an IV-type out-of-core smelt retention device after a nuclear power plant accident, which adopts a complete passive cooling design of the core to improve the safety of the nuclear power plant. Background technique [0002] Melt retention technology is an important mitigation measure for serious accidents in nuclear power, 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 the mitigation measures for serious accidents after the pressure vessel is damaged. [0003] AP-1000 adopts passive measures for preventing and mitigating serious accidents, mainly including setting up molten core retention facility (IVR). The space between the outer wall of the vessel and the thermal insulation layer of the reactor pit is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/00G21C9/02
CPCY02E30/40G21C9/016G21C13/02Y02E30/30
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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