Development of advanced loop-type fast reactor in Japan, 2; Technological feasibility of two-loop cooling system in JSFR

Yamano, Hidemasa   ; Kubo, Shigenobu ; Kurisaka, Kenichi ; Shimakawa, Yoshio*; Sago, Hiromi*

The conceptual design of an advanced sodium-cooled fast reactor (named JSFR) is currently carried out by the Japan Atomic Energy Agency (JAEA). In general, a large-scale nuclear reactor (approximately 1.5 GWe class) tended to increase in the number of loops (e.g., four loops in Super Phnix and APWR), while the JSFR adopts a two-loop cooling system that enables significantly reducing a plant construction cost resulting from decreasing in material amount of the nuclear steam supply system and in the reactor building volume. This paper describes technological feasibility of the two-loop cooling system in JSFR; especially, focused on flow-induced vibration of piping, safety analysis and decay heat removal system.