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Transmutation of minor actinides and long-lived fission products into short-lived isotopes is considered a promising option for the management of nuclear wastes. This requires, however, a preceding separation of the relevant elements from the bulk fission products. In the present study, the feasibility of the partitioning of hazardous elements from highly active nuclear waste solutions is demonstrated. The equipment used consisted of a battery of 12 centrifugal extractors installed in a hot cell. In a continuous process, trialkyl (C6-C8) phosphine oxide (TRPO) showed excellent extraction and back extraction properties towards actinides. Decontamination factors (DF) between 1000 and 100,000 were achieved. For the long-lived fission product Tc-99, also considered as a candidate isotope for transmutation, DF values higher than 1000 were measured. The cross-over of the different process streams was very low and recoveries better than 99.5 % were obtained.

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Authors: GLATZ J-P, JRC Karlsruhe (DE);SONG C, JRC Karlsruhe (DE);HE X, JRC Karlsruhe (DE);BOKELUND H, JRC Karlsruhe (DE);KOCH L, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 1993 Symposium on Emerging Technologies in Hazardous Waste Treatment V, Atlanta (US), September 27-29, 1993
Availability: Available from (1) as Paper EN 37891 ORA
Record Number: 199311358 / Last updated on: 1994-11-28
Original language: en
Available languages: en