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Okano, Yasushi; Yamano, Hidemasa
Proceedings of Asian Symposium on Risk Assessment and Management 2017 (ASRAM 2017) (USB Flash Drive), 3 Pages, 2017/11
Forest fire hazard assessment methodologies using a logic tree have been applied for the evaluation of combination hazard curves of a forest fire with lightning as an initiator of a forest fire and with a strong wind being independent from a forest fire. The complex shape of the combinational hazard curve of forest fire and lighting is due to that both lightning and high velocity wind tend to appear under unstable weather conditions, and there is correlation between two hazards. The evaluated combinational hazard curve of forest fire and strong wind for the instantaneous wind velocity over 80 m/s has extremely small frequency in the range below 10
/year.
Kurisaka, Kenichi; Yamano, Hidemasa; Nishino, Hiroyuki
no journal, ,
This study aims at developing the probabilistic risk assessment methodology of decay heat removal function in sodium-cooled fast reactor systems against wind hazard. For this purpose, wind hazard curve was evaluated; event trees were developed to identify the strong wind induced core damage sequence; core damage frequency was quantified, and dominant sequence was evaluated.