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In the present work the performance of several processes used for advanced reprocessing of commercial L WR fuels as well as transmutation targets is compared. As a first step, uranium and plutonium were recovered by PUREX type reprocessing. The raffinate, containing fission products, lanthanides and the minor actinides (MA) were used as feed for the second step in which minor actinides and lanthanides were separated from the bulk of the fission products. The five different processes tested use CMPO, DIDPA, TRPO, Diamide and CYANEX 923 as extractants. In the third step MA is separated from lanthanides. Here, three processes were tested, i.e. using CYANEX 301, the synergistic mixture of di-chloro substituted CYANEX 301 and TOPO, and BTP solvents. Column, batch and continuous counter-current extraction techniques were used for the tests. The different processes will be described and discussed in terms of performances and efficiencies for Am and Cm. Efficient separation of MA from different genuine fuel. Solutions could be demonstrated and thereby also the possibility of closing a future transmutation fuel cycle. The combination, Diamide and BTP was found to be the best among extractants tested to achieve an efficient MA recovery from spent fuel.

Additional information

Authors: SATMARK ET AL, JRC Institute for Transuranium Elements, Karlsruhe (DE)
Bibliographic Reference: An oral report given at: The International Conference ATALANTE 2000. Held at: Avignon (FR)
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