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溶融NaNO$$_{3}$$中におけるRuの酸化還元挙動

Redox behavior of Ru in NaNO$$_{3}$$ melt

永井 崇之; 岡本 芳浩; 猪瀬 毅彦*; 秋山 大輔*; 佐藤 修彰*

Nagai, Takayuki; Okamoto, Yoshihiro; Inose, Takehiko*; Akiyama, Daisuke*; Sato, Nobuaki*

ガラス溶融炉へ供給された高レベル放射性廃液が脱水後に混合硝酸塩を形成することから、本研究は、廃液の主成分であるNaNO$$_{3}$$を溶媒としてRu含有NaNO$$_{3}$$試料を調製し、溶融NaNO$$_{3}$$中におけるRuの酸化還元挙動をサイクリックボルタンメトリで測定するとともに、凝固塩に含まれるRuの原子価を放射光XAFS測定等により評価した。

A supplied high level liquid waste into the glass melter is formed to the mixed nitrate salt after the dehydration. In this study, NaNO$$_{3}$$ which is a main ingredient in the waste was selected by the solvent, and NaNO$$_{3}$$ sample including Ru was prepared, and the redox behavior of Ru in NaNO$$_{3}$$ melt was measured by the Cyclic Voltammetry. And valence of Ru included in solidified salt was estimated by the synchrotron XAFS measurement.

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