Updating of local blockage frequency in the reactor core of SFR and PRA on consequent severe accident in Monju

Nishimura, Masahiro ; Fukano, Yoshitaka  ; Kurisaka, Kenichi ; Naruto, Kenichi*

Fuel subassemblies (FSAs) of fast breeder reactors (FBRs) are densely arranged and have high power densities. Therefore, PRA on LF which was initiated from LB was performed reflecting the state-of-the-art knowledge in this study. As the result, damage propagation from LF caused by LB in Monju can be negligible compared with the core damage due to ATWS or PLOHS in the viewpoint of both frequency and consequence.