Flowsheet Study of U-Pu Co-Crystallization Reprocessing System
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概要
- 論文の詳細を見る
A U-Pu co-crystallization reprocessing system is proposed for light water reactor fuels and its flowsheet study is carried out. This reprocessing system is based on experimental evidence indicating that Pu(VI) in a nitric acid solution is co-crystallized with uranyl nitrate, whereas it is not crystallized when uranyl nitrate is not present in the solution. The system consists of five steps: dissolution of spent fuel, Pu oxidation, U-Pu co-crystallization, re-dissolution of the crystals, and U re-crystallization. The proposed system does not require the use of organic solvents, resulting in a relative increase in safety and cost-effectiveness. The system requires recycling of the mother liquor from the U-Pu co-crystallization step to recover almost the entire amount of U and Pu at this step. The appropriate recycling ratio is determined, such that satisfactory decontamination is achieved. A consistent ratio of Pu to U in the mother liquor from the U re-crystallization is maintained by regulating the temperature, suggesting that the quality of the liquor, which can be a source of mixed oxide fuels, can be controlled despite differences in the composition of the spent fuel. The size of a plant utilizing the proposed system is estimated to be about 30% less than that of the PUREX system.
- 社団法人 日本原子力学会の論文
- 2008-06-01
著者
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Kikuchi Toshiaki
Energy Project And Technol. Center Mitsubishi Materials Corp.
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Homma Shunji
Division Of Materials Science Graduate School Of Science And Engineering Saitama University
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Koyama Tomozo
Nuclear Fuel Cycle Engineering Laboratories Japan Atomic Energy Agency
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Kikuchi Toshiaki
Energy Project And Technology Center Mitsubishi Materials Corporation
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SHIBATA Atsuhiro
Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency
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CHIKAZAWA Takahiro
Energy Project and Technology Center, Mitsubishi Materials Corporation
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ISHII Jun-ichi
Division of Materials Science, Graduate School of Science and Engineering, Saitama University
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KOGA Jiro
Division of Materials Science, Graduate School of Science and Engineering, Saitama University
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MATSUMOTO Shiro
Division of Materials Science, Graduate School of Science and Engineering, Saitama University
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Ishii Jun-ichi
Division Of Materials Science Graduate School Of Science And Engineering Saitama University
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Chikazawa Takahiro
Energy Project And Technology Center Mitsubishi Materials Corporation
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Matsumoto Shiro
Division Of Materials Science Graduate School Of Science And Engineering Saitama University
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Koga Jiro
Division Of Materials Science Graduate School Of Science And Engineering Saitama University
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Shibata Atsuhiro
Nuclear Fuel Cycle Engineering Laboratories Japan Atomic Energy Agency
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Homma Shunji
Div. Of Materials Sci. Graduate School Of Sci. And Engineering Saitama Univ.
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Koyama Tomozo
Nuclear Cycle Engineering Department Nuclear Fuel Cycle Engineering Laboratories Japan Atomic Energy Agency
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Shibata Atsuhiro
Nuclear Cycle Engineering Department Nuclear Fuel Cycle Engineering Laboratories Japan Atomic Energy Agency
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