Recovery of Transuranium Elements from Real High-Level Liquid Waste by Pyropartitioning Process
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概要
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A pyropartitioning process is under development to recover minor actinide elements from high-level liquid waste (HLLW) generated by Purex reprocessing. This pyropartitioning process consists of a denitration step that converts various elements in the HLLW into oxides, a chlorination step that converts the oxides into chlorides, and a reductive-extraction step that separates the actinide elements from fission products (FPs) in the chlorination product. The feasibility of each step was confirmed using simulating FPs and unirradiated transuranium elements (TRUs). In the present study, approximately 520 g of real HLLW was prepared to demonstrate the feasibility of the pyropartitioning process. Almost 100% of each TRU originally contained in the HLLW was recovered in the liquid cadmium phase in the reductive-extraction step, which showed that the expected chemical reactions were completed and the mass loss of TRUs was negligible in the denitration, chlorination, and reductive-extraction steps. The separation behaviors of actinide elements, including americium and curium, from FPs in the reductive-extraction step were quite similar to those observed in previous experiments using unirradiated materials. Hence, the pyropartitioning process was successfully verified.
- 2011-02-01
著者
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IIZUKA Masatoshi
Central Research Institute of Electric Power Industry
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Uozumi Koichi
Central Research Institute of Electric Power Industry
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Kurata Masaki
Central Research Institute of Electric Power Industry
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INOUE Tadashi
Central Research Institute of Electric Power Industry
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KOYAMA Tadafumi
Central Research Institute of Electric Power Industry
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OUGIER Michel
Institute for Transuranium Elements
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MALMBECK Rikard
Institute for Transuranium Elements
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GLATZ Jean-Paul
Institute for Transuranium Elements
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Koyama Tadafumi
Central Res. Inst. Of Electric Power Ind.
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