Air-borne radioactive filtering system of underground nuclear power station

Abstract

The invention relates to the technical field of underground nuclear power stations, and discloses an air-borne radioactive filtering system of an underground nuclear power station. The system comprises a containment, a pressure relief cavity and a ground surface water pool, wherein the containment, the pressure relief cavity are positioned in an underground rock stratum; a standby pipeline group and a filtering device are arranged in the pressure relief cavity; the filtering device comprises an air inlet, an air outlet and a Venturi filter group which, wherein the head and the tail of the Venturi filter group respectively communicate with the air inlet and the air outlet; the Venturi filter group comprises a plurality of filters communicating with one another through pipelines in the standby pipeline group; the standby pipeline group is provided with a standby stop valve group; the standby stop valve group comprises a plurality of stop valves which are arranged on the pipelines for realizing serial and parallel connection of the filters through opening and closing; an air inlet communicates with the interior of the containment through a pressure relief pipe; the air outlet communicates with a ground surface chimney through a pressure relief discharge pipeline; and the filtering device is also connected with the ground surface water pool through a ground injection pipeline and aground discharge pipeline. According to the air-borne radioactive filtering system for the underground nuclear power station, the number of the accessed filters can be flexibly set according to severity of an accident, replacement in service can be realized easily, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of underground nuclear power plants, in particular to an airborne radioactive filter system for underground nuclear power plants. Background technique [0002] Underground nuclear power plants place nuclear islands and other nuclear-related plants underground, and use the protection and containment of underground rock mass to limit the release of potential radioactive substances to the environment, improve the safety of nuclear power plants, and provide new ideas for the safe development of nuclear power in my country. [0003] Moreover, one of the major advantages of underground nuclear power plants is that it can prevent the uncontrolled release of airborne radioactivity to the outside environment immediately in severe accidents, causing radioactive pollution. In this regard, in the prior art, dry sand bed filtration and wet Venturi filtration are mostly used to form a filtration system, but this method la...

AI Technical Summary

Problems solved by technology

In this regard, in the prior art, dry-type sand bed filtration and wet-type Venturi filtration are mostly used to form a filtration system, but this method lacks flexibility, the filtration capacity cannot be adjusted, and the resulting secondary radioactive pollution filter element is inconvenient to replace

[0004] Chinese invention patent application (publication date: February 15, 2017, publication number: CN106409370A) discloses a low-intermediate radioactive waste disposal warehouse and method with airborne radioactive filtration and discharge function, using air-permeable concrete and filter fine sand layer to filter Radioactive particulates in airborne radioactivity, but this filter produces a difficult layer of radioactive sand, and the filter capacity is fixed and cannot be replaced

[0005] Chinese invention patent application (publication date: September 24, 2014, publication number: CN104064238A) discloses a passive water washing filtration system for airborne radioactive effluents of underground nuclear power plants, which uses water washing to filter radioactive particles in airborne radioactivity, but the The filtration capacity of the scheme is single, and different filtration capacities cannot be selected according to the severity of the accident. Once put into use, even if a small amount of airborne radioactive material is filtered, the system will be polluted as a whole, and the system cannot be replaced in service

Images