Study on heat transfer in intermediate heat exchangers and natural circulation of fast reactors

Takano, Masahito*; Mochizuki, Hiroyasu

An intermediate heat exchanger (IHX) of a sodium cooled fast reactor is a component to transfer heat generated in the core to the secondary heat transport system. In the present study, an empirical correlation about heat transfer coefficient has been discussed using test data of IHXs at the Joyo with the MK-III core, at the 50MW-SG facility, and also at the prototype reactor Monju in order to apply it to plant analysis of Monju, and the system and component design of the future reactor. After the obtained correlation is incorporated into the plant dynamics analysis codes, it has been confirmed that a test of the natural circulation in the secondary heat transport system of Monju can be tranced by the codes.