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Performance evaluation on secondary sodium fire measures in JSFR

JSFRにおける2次ナトリウム火災対策についての評価

近澤 佳隆; 加藤 篤志; 山本 智彦; 久保 重信; 岩崎 幹典*; 原 裕之*; 島川 佳郎*; 坂場 弘*

Chikazawa, Yoshitaka; Kato, Atsushi; Yamamoto, Tomohiko; Kubo, Shigenobu; Iwasaki, Mikinori*; Hara, Hiroyuki*; Shimakawa, Yoshio*; Sakaba, Hiroshi*

JSFRは2次系のナトリウムバウンダリを2重化しており信頼性を強化している。本検討では厳しい想定を行い、2重バウンダリ破損があった場合の対策設備の性能を評価した。

JSFR adopts double boundary for all sodium components. However, design measures are investigated for the secondary sodium fire inside the reactor building, which might be assumed as design extension conditions (DECs). Candidates of sodium fire measures in the secondary sodium systems such as sodium drain, nitrogen injection, pressure release valve, catch pan and leak sodium drain system have been compared from the view point of safety. Wide range of sodium fires in the steam generator room have been analyzed evaluating performances of the candidate sodium fire measures.

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