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Partitioning of High-Level Waste as Pretreatment in Waste Management

  • M. Kubota (a1), I. Yamaguchi (a1), K. Okada (a1), Y. Morita (a1), K. Nakano (a1) and H. Nakamura (a1)...

Abstract

Removal of the long-lived radionuclides from high-level waste (HLW) is a potential means not only for making wastes more acceptable in terms of long term hazards, but also for alleviating storage requirement. From these points, the authors are developing a method of partitioning actinides, Sr-90 and Cs-137 from HLW. A chemical flow-sheet has been constructed and experiments with actual HLW were initiated in 1982. Through the partitioning, active elements in HLW can be fractionated into 3 groups. Total volume of the solid materials of the 3 groups was calculated and found to be reduced to less than one-third of the volume of the vitrified material containing 10 wt% of fission products as oxide. Such volume reduction seems to facilitate the long term storage or the deep geological disposal of HLW.

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Partitioning of High-Level Waste as Pretreatment in Waste Management

  • M. Kubota (a1), I. Yamaguchi (a1), K. Okada (a1), Y. Morita (a1), K. Nakano (a1) and H. Nakamura (a1)...

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