Development of core damage evaluation technology (level 2 PSA) for fast reactors, 5; Progress of R&D in FY2007

Nakai, Ryodai ; Kurisaka, Kenichi ; Sato, Ikken ; Tobita, Yoshiharu; Kamiyama, Kenji  ; Yamano, Hidemasa   ; Miyahara, Shinya  ; Ohno, Shuji  ; Seino, Hiroshi ; Ishikawa, Hiroyasu ; Nishimura, Masahiro ; Sato, Isamu; Isozaki, Mikio; Koyama, Kazuya*; Yoshioka, Naoki*; Watanabe, Osamu*; Nakai, Kimikazu*; Yamada, Yumi*; Hayakawa, Satoshi*; Morita, Koji*

To develop a core damage evaluation technology (level-2 PSA) in sodium-cooled fast reactors, a new analysis method is developed for core-material relocation phase and internal containment vessel event. This study also develop technical basis necessary for the level-2 PSA.