Behavior of high burnup LWR fuels during design-basis accidents; Key observations and an outline of the coming program

設計基準事故時の高燃焼度軽水炉燃料の挙動; 主な知見と次期計画の概要

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。

In order to evaluate adequacy of present safety criteria and safety margins and to provide a database for future regulation on higher burnup UO and MOX fuels, new cladding and pellets, an extensive program has been performed in the Japan Atomic Energy Agency (JAEA). The research program "Advanced LWR Fuel Performance and Safety" (ALPS) is comprised primarily of tests simulating a reactivity-initiated accident (RIA) and a loss-of-coolant accident (LOCA) on high burnup fuels shipped from European nuclear power plants. The paper describes key observations in the first phase (FY2002 to FY2007) and an outline of the second phase (FY2008 to FY2013) of the program.