concentration feed solution and scrubbing solutionNakahara, Masaumi; Sano, Yuichi 
; Miyachi, Shigehiko ; Koizumi, Tsutomu; Koyama, Tomozo; Aose, Shinichi
Concerning the advanced aqueous reprocessing system, the simplified solvent extraction process for U, Pu and Np co-recovery has been investigated. We carried out the counter-current experiment, which aimed for Np oxidation and extraction by high [HNO] condition. For preventing Np leakage to the raffinate, feed solution and scrubbing solution with high [HNO] were used, which would bring high [HNO] in the extraction section and efficient Np oxidation and extraction in this section. In addition, high [HNO] in the feed solution could help the pre-oxidation of Np to extractable Np(VI). In the steady state, the Np leakage to the raffinate could be kept under about 1%. The stage efficiencies for these elements were estimated by fitting the concentration profiles calculated by MIXSET-X into the experimental results. The stage efficiency of U, Pu and Np were evaluated 100%, 100% and 98.5% in the extraction section and 95%, 90% and 89% in the stripping section respectively.
Language |
: | Japanese |
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Report No. |
: | JAEA-Research 2006-030 |
Pages |
: | 43 Pages |
Publication Year/Month |
: | 2006/06 |
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Keywords |
: | no keyword |
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Article of JAEA R&D Review |
: | Solvent Extraction of Actinide Elements in New Extraction System for TRU Recovery (NEXT); Development of Advanced Reactor Fuel Reprocessing[ |
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