Containment vessel pressure relieving, filtering, and discharging comprehensive system

A containment and comprehensive technology, applied in the field of containment pressure relief filtration and discharge comprehensive system

Active Publication Date: 2018-05-22
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, due to the large population of our country and the relatively dense distribution of inland population, inland nuclear power plants have higher requirements for the limitation of radioactive effluents, especially the technical trend of zero discharge of radioactive gases after severe accidents, which puts forward new requirements for the design of inland nuclear power plants. challenge

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  • Containment vessel pressure relieving, filtering, and discharging comprehensive system

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] In the event of a severe accident in a nuclear power plant, a large amount of radioactive gas will be produced in the containment, and if released into the environment, it will cause adverse nuclear safety consequences to personnel and the environment. The research of the present invention starts from understanding the mass-energy release and containment performance and behavior in the long-term stage after the severe accident of the PWR nuclear power plant, and carries out technical exploration and program research of zero discharge after the severe accident. Through the study of several technical means for containment depressurization and collection and filtration of emissions, analyze their reality and possibility, develop system and core equipment design combinations, and carry out research and trial production and performance verification. ...

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Abstract

The invention relates to a containment vessel pressure relieving, filtering, and discharging comprehensive system. The system comprises a discharge pipeline for discharging air in a containment vessel. A first metal fiber filter is arranged on the section, which is in the containment vessel, of the discharge pipeline. After the discharge pipeline is leaded out from the containment vessel, the discharge pipeline penetrates an isolating valve of the containment vessel and is connected to a Venturi water washing filter. After the discharged air is filtered by the Venturi water washing filter, discharged air enters a second metal fiber filter. Condensate formed in the second metal fiber filter is returned to the Venturi water washing filter by a condensate returning pipeline. The air outlet end of the second metal fiber filter is connected to a silver-zeolite filter through a preheating loop. The air outlet end of the silver-zeolite filter is connected to a rupture disk. A downstream pipeline of the rupture disk is connected to a chimney of a nuclear power plant through a discharge isolating valve; or the downstream pipeline is returned to the interior of the containment vessel throughan air returning pipeline or is connected to a waste gas storage device. The system can guarantee the integrity of a containment vessel after a severe accident and ensures that no radioactive substance is discharged to the atmosphere and no person is damaged.

Description

technical field [0001] The invention belongs to the design technology of nuclear power plants, and in particular relates to a comprehensive system for containment pressure relief, filtration and discharge. Background technique [0002] The overall goal of nuclear safety is to ensure the safety of individuals, society and the environment by establishing and maintaining effective radiological protection barriers. The design of the nuclear power plant shall ensure that the radioactive dose discharged to the environment is kept at a reasonably achievable and as low level as possible under design basis accidents or even severe accidents, and the radioactive consequences shall be minimized. [0003] The containment of nuclear power plants is the last barrier to prevent the release of radioactive products into the environment. When a serious accident of core melting occurs, due to the continuous increase of steam and the non-condensable gas generated by the reaction between the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/02G21C9/004
CPCG21C9/004G21C9/02Y02E30/30
Inventor 朱京梅邢继荆春宁吴明李军王晓江刘长亮刘诗华孙占孙超杰
Owner CHINA NUCLEAR POWER ENG CO LTD
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