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シビアアクシデント時におけるセシウムの構造材への化学吸着挙動評価,1; Cs化学吸着したステンレス鋼からのCs溶出挙動評価

Cesium chemisorption behavior onto structural material under severe accident conditions, 1; Leaching behavior of Cs from Cs-chemisorbed stainless steel

山下 真一郎; 三輪 周平; 逢坂 正彦; 永瀬 文久

Yamashita, Shinichiro; Miwa, Shuhei; Osaka, Masahiko; Nagase, Fumihisa

シビアアクシデント時におけるセシウム(Cs)の構造材料への化学吸着挙動を解明するため、高温でCs吸着させたステンレス鋼の水等への浸漬試験から吸着Csの溶出挙動を評価した。クエン酸を用いた場合には水よりもCs溶出率が高いこと、化学吸着割合が高い場合にはCsとSiの溶出量が高い傾向にあること等が分かった。

In order to elucidate chemisorption behavior of cesium onto the structural material during severe accident, leaching behavior of cesium from cesium-chemisorbed stainless steel into solutions of water or citric acid was evaluated. Results of leaching test indicated that leaching rate of Cs for citric acid was higher than that for water and that, in the case of high chemisorption rate, amount of elutions of both cesium and silicon increased.

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