Containment vessel pressure relieving, filtering, and discharging comprehensive system

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...

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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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