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

摘要

Systems and methods are provided for reducing the release of air into a radioactive material in the event of a serious accident. A system for reducing air emissions 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 produces steam using heat of a coolant heated in a nuclear reactor, and a turbine and a main steam line A steam generator connected; A decontamination water tank connected via the main steam line and a connection line, and including decontamination water to decontaminate the steam transported from the steam generator in the event of a serious accident to reduce atmospheric emissions of radioactive materials; A pressure-reducing power generation means arranged on the connection line and lowering the pressure of the steam transferred from the steam generator to the decontamination tank in the event of a serious accident and simultaneously generating emergency power; And cooling means disposed to surround the outside of the decontamination tank to cool the decontamination tank.