Integrated containment filtration and drainage system

Abstract

The invention aims to provide an integrated containment filtrate exhaust system. A wet filter system serves as a primary filter and mainly comprises a jet-type bubble generation system and a static mixing assembly, and most of radioactive aerosol and molecular iodine in airflow can be removed in a washing manner; gases subjected to wet filtering are subjected to secondary filtration in a metal fiber filter, so that aerosol with a small particle size and entrained liquid drops are removed; and finally the gases enter a silver zeolite filter to remove radioactive methyl iodide gases in the gases. The silver zeolite filtering system is preheated and insulated by utilizing energy of the exhausted gases, and by utilizing a change relationship of the exhaust gas temperature along with pressure, a phenomenon that water vapor is not condensed after the mixed gas enters the silver zeolite filter is ensured, and high filtering efficiency of the methyl iodide gases is ensured. The integrated containment filtrate exhaust system disclosed by the invention has stable high filtering efficiency on radioactive substance, particularly the filtering efficiency of gaseous methyl iodide gases is improved, and the system is compact in structure and low in requirement on space.

Description

technical field [0001] The invention relates to a nuclear power plant accident treatment device, in particular to a safety vessel overpressure protection and radioactive substance retention treatment device. Background technique [0002] As the world's energy shortage and environmental pollution become more and more serious, people pay more and more attention to new clean energy. Among them, nuclear power, as a clean and efficient energy, has been widely used all over the world. In order to prevent radioactive leakage, nuclear power plants have three safety barriers, of which the nuclear power plant containment is the last safety barrier to prevent the release of radioactive products to the environment. After the Fukushima accident in Japan, the issue of containment overpressure in the late stages of severe accidents in nuclear power plants has received widespread attention. , the molten core will also react with the bottom concrete to continuously generate non-condensable ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an integrated containment filter discharge system that effectively solves the silver zeolite failure problem

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