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MOX Co-deposition tests at RIAR for SF reprocessing optimization

RIARにおけるMOX共析再処理最適化試験

小藤 博英; 佐藤 史紀; 明珍 宗孝; 中西 繁之*; Kormilitsyn, M. V.*; Ishunin, V.*; Bychkov, A. V.*

Kofuji, Hirohide; Sato, Fuminori; Myochin, Munetaka; Nakanishi, Shigeyuki*; Kormilitsyn, M. V.*; Ishunin, V.*; Bychkov, A. V.*

酸化物電解法は将来の燃料サイクルシステムにおける乾式再処理の候補技術として研究されている。酸化物電解法の中心工程であるMOX共析工程において、技術の実現性を確認するための基礎試験を実施した。試験においては要求されるMOX顆粒を得るために、UやPu濃度,FP濃度,CP濃度,吹き込みガス組成等をパラメータとして設定した。試験の結果、不要な沈殿を生じることなく高いPu富化度の顆粒を得るためには、電解中に吹き込むガス組成が重要なパラメータであることが確認された。また、最終的に使用済燃料を用いた試験により、MOX共析電解制御手法の妥当性が確認された。

The Oxide Electrowinning method has being studied as one of the candidate dry reprocessing concepts of future fuel cycle system. On the MOX co-deposition process, main process of that method, some fundamental experiments have been performed to confirm its feasibility. In the experiments, several parameters were set to study the suitable electrolysis condition to obtain desired granule of MOX. The concentrations of uranium, plutonium, FP simulators, and CP simulators were adopted as the parameters. The blowing gas composition during the electrolysis was also set as the variable condition. Through these experiments, it was clarified that the partial pressure of chlorine gas during electrolysis was important to obtain MOX granule with high Pu concentration without generating bottom precipitation in melt. Finally, adequacy of process control method for MOX co-electrolysis was confirmed through the test using spent FR fuel.

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パーセンタイル:59.42

分野:Nuclear Science & Technology

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