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Actinide reformer concept

Sasa, Toshinobu   ; Nishihara, Kenji  ; Sugawara, Takanori  ; Okamoto, Yoshihiro  ; Oigawa, Hiroyuki 

The partitioning-transmutation technology is effective to reduce the environmental impact from deposition of high-level wastes. However, americium and curium has difficulties to handle in the fuel cycle because of their high decay heat and radioactivity. These nuclides also give the chemical instability. We propose a new system concept, Actinide Reformer, which reforms the americium and curium into plutonium by neutron capture reaction to reduce the burden in the fuel cycle. Am and Cm are separated from main stream of reprocessing and converted to chloride molten-salt. Using liquid-type fuel, above mentioned defects of Am and Cm can be compensated. Actinide Reformer is designed as an accelerator-driven system which composed of a 10 MW-class cyclotron, tungsten spallation target and molten-salt fuelled subcritical core. The engineering feasibility of accelerator and spallation target is in the range of existing technology. Reformed molten-salt fuel is reprocessed as a batch fuel exchange manner. Addition of reformed plutonium into power plant MOX fuel expects no significant engineering difficulties.

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Category:Nuclear Science & Technology

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