FULLY PASSIVE DECAY HEAT REMOVAL SYSTEM FOR SODIUM COOLED FAST REACTOR WITH A PARTIALLY-IMMERSED DECAY HEAT EXCHANGER

摘要

PURPOSE: A fully passive remaining heat removal system of a sodium-cooled fast reactor is provided to improve the reliability of an operation waiting state of a safety system by minimizing a function lose of heat removal loop due to a sodium solidification. CONSTITUTION: A high temperature pool(120) stores a high temperature sodium heated by a nuclear reactor. An intermediate heat exchanger implements a heat exchange with the sodium of the high temperature pool. A low temperature pool accepts a low temperature sodium passing through the intermediate heat exchanger. A sodium-sodium decay heat exchanger(150) eliminates the decay heat of inside the nuclear reactor. A sodium-air heat exchanger is installed on a location higher than the sodium-sodium decay heat exchanger. A first system pump maintains a liquid level difference of the high temperature pool and the lower temperature pool.