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Design method for dehydrogenating containment of nuclear power station under serious accident

A serious accident and design method technology, applied in power plant safety devices, nuclear power generation, nuclear engineering, etc., can solve problems such as the lack of hydrogen elimination design schemes, and achieve the effect of improving reliability and ensuring safety

Inactive Publication Date: 2012-01-04
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

[0012] Some nuclear power plants only have hydrogen elimination measures under design basis accidents - mobile hydrogen recombination of ETY system, lack of hydrogen elimination design schemes under severe accidents

Method used

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  • Design method for dehydrogenating containment of nuclear power station under serious accident
  • Design method for dehydrogenating containment of nuclear power station under serious accident
  • Design method for dehydrogenating containment of nuclear power station under serious accident

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Embodiment Construction

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] At present, hydrogen elimination equipment mainly includes passive hydrogen recombiner and igniter. The passive hydrogen recombiner has a simple structure, high hydrogen elimination efficiency, and more engineering experience; the igniter requires a complex power supply system and corresponding auxiliary facilities, requires a control system to start, and also has the risk of harming other equipment in the containment vessel. Combined with the current technical status of severe accident analysis in China, it is more difficult to accurately analyze and calculate the igniter layout requirements, and the passive hydrogen recombiner is more widely used than the igniter. Therefore, the present invention chooses to use a passive hydrogen recombiner in the design scheme of containment hydrogen elimination.

[0058] Such as figure 1 ...

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Abstract

The invention belongs to a nuclear power station system design technology, and in particular relates to a design method for dehydrogenating a containment of a nuclear power station under a serious accident. The method comprises the following steps of: selecting large break loss of coolant accident (LBLOCA), small break loss of coolant accident (SBLOCA) and station blackout (SBO) as a typical serious accident sequence; according to the serious accident sequence, modeling by using an MELCOR program, and calculating hydrogen generation amount and hydrogen concentration distribution; according to the hydrogen generation amount and the hydrogen concentration distribution, selecting a typical position for initial point distribution of a non-kinetic hydrogen recombiner; performing thermal impact analysis on the hydrogen recombiner to determine specific arrangement principles and requirements of the hydrogen recombiner; and analyzing and calculating a dehydrogenation effect of an initial point distribution scheme of the hydrogen recombiner to determine a final power distribution scheme. In the invention, a containment non-kinetic hydrogen recombiner system can be arranged reasonably, and the method is used for controlling a hydrogen risk of the containment under the serious accident, so that the integrity of the containment serving as a third protective screen is ensured.

Description

technical field [0001] The invention belongs to the design technology of nuclear power plant systems, and in particular relates to a design method for dehydrogenation of containment shells under serious nuclear power plant accidents. Background technique [0002] Since the Three Mile Island accident in the United States, severe accidents in nuclear power plants have drawn widespread attention from global nuclear safety authorities and the International Atomic Energy Agency, and all countries have realized that the possibility of severe accidents cannot be completely ruled out. The safety work of nuclear power should not only be limited to design basis accidents, but must also consider countermeasures against severe accidents. A large amount of hydrogen will be produced and released in the containment after a severe accident. Research institutions in France, Germany, Canada, Japan and other countries have carried out extensive and in-depth research and experiments on severe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D3/06G21C9/06
CPCY02E30/40Y02E30/00Y02E30/30
Inventor 李丽娟刘建平李军李嫦月王晓江于凤云刘江刘虎张巍
Owner CHINA NUCLEAR POWER ENG CO LTD
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