Simultaneous recovery of all actinides from spent nuclear fuel by carbamoyl-methylphosphine oxide in fluorinated diluents
- Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Ibaraki-ken, 311-1393 (Japan)
- V.G. Khlopin Radium Institute, Murinskiy Ave. 28, 194021 St.-Petersburg (Russian Federation)
Bifunctional organophosphorus extractants dissolved in polar fluorinated diluents were studied, aiming at directly recovering all f-elements from the dissolver solution of spent nuclear fuel. Octyl(phenyl)-N,N-diisobutyl-carbamoyl-methylphosphine oxide (0{phi}D[iB] CMPO, 0.2-0.8 M) with 30% TBP dissolved in meta-nitrobenzotrifluoride (Fluoropole-732) dramatically expanded its extraction region without splitting out a heterogeneous third phase. Distribution ratios of U, Np, and Pu were sufficiently high for 0.4-0.8 M CMPO in this solvent system. Combination of salt-free, methylamine carbonate (MAC), citric acid, and hydrazine reagents were evaluated to obtain fractional stripping of f-elements such as TRU group and U. Static multistage extraction using artificial FBR dissolver solution supported the process feasibility. When all f-elements are extracted simultaneously, and TRU and U recovered separately with a single extraction cycle, the new extraction process, named ORGA-process, can be expected to be highly proliferation-resistant and systematically and economically advantageous. (authors)
- Research Organization:
- Chemical Sciences Division, Oak Ridge National Laboratory (United States)
- OSTI ID:
- 21230371
- Resource Relation:
- Conference: ISEC 2008: International Solvent Extraction Conference on Solvent Extraction: Fundamentals to Industrial Applications, Tucson, AZ (United States), 15-19 Sep 2008; Other Information: Country of input: France; 7 refs; Related Information: In: Proceedings of ISEC 2008, International Solvent Extraction Conference - Solvent Extraction: Fundamentals to Industrial Applications, by Moyer, Bruce A. (ed.), 1740 pages.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Third phase formation in the extraction of Nd(III) by octyl(phenyl)-N,N-diisobutyl carbamoyl methyl phosphine oxide (O{Phi}CMPO)
Fluorinated Diluents - New Possibilities For Radiochemical Technology