Computer simulation for short-term irradiation behavior of mixed oxide fuels containing Am in a fast reactor

高速炉で短期照射したAm含有MOX燃料の照射挙動解析

横山 佳祐 ; 生澤 佳久   ; 上羽 智之 ; 森本 恭一 ; 田中 康介  ; 廣岡 瞬 

Yokoyama, Keisuke; Ikusawa, Yoshihisa; Uwaba, Tomoyuki; Morimoto, Kyoichi; Tanaka, Kosuke; Hirooka, Shun

高速炉MOX燃料において、蒸気圧, 熱伝導率, 密度等の燃料物性値に対するMA添加の効果を表現した解析モデルを開発し、照射挙動解析コード"CEDAR"に組み込んだ。CEDARによる評価解析を高速実験炉常陽での短期照射試験B11の照射試験結果に適用し、照射挙動メカニズムを評価した。

We have developed analytical models for describing the effects of MAs on fuel physical properties such as vapor pressure, thermal conductance and density. These models were incorporated into a computer simulation code CEDAR, which predicts mechanical and thermal behaviors of a fuel pin irradiated in FRs. CEDAR was applied to the short-term irradiation experiments of the fuel pins in the experimental fast reactor Joyo. Mechanisms of these behaviors were investigated through the comparison between the PIEs and simulations and analyzing them.