Development of an advanced reprocessing system based on use of pyrrolidone derivatives as novel precipitants with high selectivity and control ability - precipitation behavior of plutonium
- Japan Atomic Energy Agency: Tokai-mura, Naka-gun, Ibaraki 319-1195 (Japan)
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550 (Japan)
- Mitsubishi Materials Corporation, Mukoyama, Naka, Ibaraki 311-0102 (Japan)
Precipitation behavior of Pu with pyrrolidone derivatives of N-butyl-2-pyrrolidone (NBP) and N-propyl- 2-pyrrolidone (NProP) has been examined to develop a simple reprocessing process of spent nuclear fuel based only on precipitation method. It has been already found that one of the pyrrolidone derivatives, N-cyclohexyl-2- pyrrolidone (NCP), can selectively precipitate UO{sub 2}{sup 2+} ions in aqueous HNO{sub 3} solutions and a process consisting of two separation processes; selective U precipitation process and U-Pu co-precipitation process, was developed with NCP. In the present study, Pu precipitation from solutions of only Pu and U-Pu mixture with NBP and NProP was examined to evaluate their applicability to the selective U precipitation process. Both NBP and NProP have lower hydrophobicity and donicity than NCP, and are, therefore, expected to make the U precipitation more selective and effective. It was found that the precipitation ability of NBP and NProP for Pu is lower than that of NCP and the lower coprecipitation and faster re-dissolution of Pu(IV) in the mixed solution of U(VI) and Pu(IV) was obtained in the precipitation with NBP and NProP than with NCP. From these results, it is expected that NBP and NProP would make the selective U precipitation process more selective and effective. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 20979728
- Resource Relation:
- Conference: Advanced nuclear fuel cycles and systems (GLOBAL 2007), Boise - Idaho (United States), 9-13 Sep 2007; Other Information: Country of input: France; 8 refs; Related Information: In: Proceedings of GLOBAL 2007 conference on advanced nuclear fuel cycles and systems, 1873 pages.
- Country of Publication:
- United States
- Language:
- English
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