Fuel safety research at JAEA

日本原子力研究開発機構における燃料安全研究

更田 豊志; 永瀬 文久 ; 杉山 智之 ; 天谷 政樹  

Fuketa, Toyoshi; Nagase, Fumihisa; Sugiyama, Tomoyuki; Amaya, Masaki

日本原子力研究開発機構安全研究センターが実施している燃料安全研究についてその概略を紹介するとともに、原子力安全・保安院から受託している事業について、第1期計画及び第2期計画の概要を示す。さらに、反応度事故時の燃料挙動,冷却材喪失事故時の燃料挙動のそれぞれについて研究の現状に対する認識,今後の課題,規制上の改善点などについて論じる。

The Japan Atomic Energy Agency (JAEA) performs the Advance Light Water Reactor Performance and Safety Research (ALPS) program in order to proceed a better understanding on behavior of high burnup fuels under accidental conditions and to provide database for regulatory judgment. JAEA launched the program in 2002, and extensive examinations including reactivity-initiated accident (RIA) studies and loss-of-coolant accident (LOCA) studies have been performed by using some unique facilities such as Nuclear Safety Research Reactor (NSRR) and Reactor Fuel Examination Facility (RFEF). High-duty operations including high burnup of fuel, power uprating and longer operation cycle are expected for efficient use of LWRs. In order to obtain the database on the behavior of the advanced fuels under accidental conditions, JAEA have started the second phase of the ALPS program (ALPS-II). The present paper describes key observations in the ALPS-I and an outline of the ALPS-II.