Phase separation and recombinaison in U1-yPuyO-x with y = 0.30, 0.45, and 1.00

MOX核燃料の相分離研究

Vauchy, R.  ; 小笠原 誠洋*; 山田 忠久*; 砂押 剛雄*; 田村 哲也*; 堀井 雄太 ; 廣岡 瞬 ; 加藤 正人   ; 村上 龍敏 

Vauchy, R.; Ogasawara, Masahiro*; Yamada, Tadahisa*; Sunaoshi, Takeo*; Tamura, Tetsuya*; Horii, Yuta; Hirooka, Shun; Kato, Masato; Murakami, Tatsutoshi

The locus of MOX and plutonia fluorite phase separation and recombination into two structures was investigated using a combination of differential scanning calorimetry (DSC) and differential thermal analysis (DTA) at the Plutonium Fuel Development Center of JAEA, Tokai-mura, Japan. The systematic cross-experiment procedure allowed refining the limits of the solvus existing in hypostoichiometric dioxides, MOX and plutonia. This allows to better understand the crystallographic behavior, and associated redox properties, of MOX fuel for fast reactors during manufacturing, and its subsequent storage.