Safety design approach for JSFR toward the realization of GEN IV sodium cooled fast reactor

Kubo, Shigenobu ; Yamano, Hidemasa   ; Chikazawa, Yoshitaka  ; Shimakawa, Yoshio*

This paper describes the safety design approach for JSFR. To achieve safety goals for Generation IV reactor, design measures should be enhanced against design extension conditions including those for external events considering the lessons learned from the TEPCO's Fukushima Dai-ichi Nuclear Power Plants accident. The current safety design approach for JSFR intends to meet the safety design criteria for Generation-IV SFR developed in the framework of the Generation-IV International Forum. Design extension conditions and related design measures are identified and selected with due consideration of the safety features of SFR. Design approach and measures for severe external events such as earthquake and tsunami, external missiles, failure to shutdown type events and failure to heat removal type events are shown. Several situations to be practically eliminated are proposed with possible design measures.