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Mizuguchi, Koji; Yasuike, Yoshiyuki*; Fukushima, Mineo; Myochin, Munetaka
Nihon Genshiryoku Gakkai Wabun Rombunshi, 6(4), p.484 - 490, 2007/12
We develop a new decladding process which integrates with dissolution using the molybdenum oxide melt. This melt possesses characteristics that can make actinide oxide dissolve at high speed without reacting with metal such as the cladding tube. To construct the new process, it is necessary to clarify the reaction mechanisms of uranium in dissolution, oxidation, and electrolysis in this melt. In this study, the gram-scale uranium examination was carried out, and the reaction mechanism of the uranium in the melt was clarified. In NaMoO - NaMoO melts, uranium dioxide dissolves as NaU(MoO) without changing its oxidation number. In the oxidation, uranium valence was oxidized from IV to VI with oxygen. In electrolysis process, it was clarified that the low current efficiency was caused by the re-dissolution of deposit. The granulated UO was recovered on the cathode by adjusting the temperature of the melt to 700 degrees centigrade at which re-dissolution was reduced.
Ikeda, Yasuhisa*; Yasuike, Yoshiyuki*; Takahashi, Koichi*; Yamamoto, Mitsuo*; Takahashi, Yoichi*
Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 101(1170), p.145 - 148, 1993/02
None
Mizuguchi, Koji; Fukushima, Mineo; Yasuike, Yoshiyuki*
no journal, ,
no abstracts in English
Fukushima, Mineo; Mizuguchi, Koji; Myochin, Munetaka; Yasuike, Yoshiyuki*; Arai, Tsuyoshi*
no journal, ,
no abstracts in English
Mizuguchi, Koji; Yasuike, Yoshiyuki*; Fukushima, Mineo; Myochin, Munetaka
no journal, ,
no abstracts in English