system for reducing the release of radioactive material to the atmosphere under severe accident

摘要

A system is provided for reducing the emission of radioactive materials to the atmosphere in the event of a serious accident. The system for reducing air emission of radioactive materials in the event of a serious accident according to an embodiment of the present invention is disposed inside a containment building and generates steam by using the heat of a coolant heated in a nuclear reactor, and generates steam through the main steam line. A steam generator connected; And a decontamination water tank connected via the main steam line and the connection line, and including demineralized water for reducing air emission of radioactive substances by decontaminating the steam transferred from the steam generator in the event of a serious accident. The water tank is disposed inside the containment building.