Partitioning of trivalent actinides from a Purex raffinate using a TODGA-based solvent-extraction process
- Forschungszentrum Juelich GmbH (FZJ), Institute for Energy Research, 52425 Juelich (Germany)
- European Commission, JRC, Institute for Transuranium Elements (ITU), 76125 Karlsruhe (Germany)
- Commissariat a l'Energie Atomique Valrho (CEA), DRCP/SCPS, BPI 7171, 30207 Bagnols sur-Ceze (France)
A TODGA/TBP process has been developed to separate trivalent actinides from a PUREX raffinate using a mixture of tetraoctyl-diglycolamide (TODGA) and tributylphosphate (TBP). Batch extraction experiments allowed us to choose and optimize the composition of the organic extractant and the aqueous feed solutions. With the aid of computer-code calculations, a countercurrent process has been developed, and an optimized flowsheet has been tested with a spiked feed solution and finally with a genuine PUREX raffinate. The results of the two tests were very promising, demonstrating that more than 99.9% of the trivalent actinides are extracted, and very high decontamination factors are obtained to the non-lanthanide fission products. Co-extracted ruthenium (10% during spiked test, 18% during hot test) is less efficiently back-extracted and therefore requires further process development. (authors)
- Research Organization:
- Chemical Sciences Division, Oak Ridge National Laboratory (United States)
- OSTI ID:
- 21230354
- 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; 9 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
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