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Abstract
Two Group ActiNide EXtraction solvents for the extraction of actinides from used nuclear fuel for transmutation purpose have been compared. The solvent studied more precisely comprises cyclohexanone, tributylphosphate, and a molecule from the bis-triazine bi-pyridine family, while the alternative utilizes di-ethyl-hexyl butyramide instead of tributylphospate. The focus of the comparison has been on the kinetics of the extraction of americium and europium, and the influence of an increased metal content on their separation factor. Both systems showed that to maintain the equilibrium separation factor up to an europium concentration of 1 mM and their SFAm/Eu is decreased with a prolonged phase contact.
ACKNOWLEDGMENTS
Dr. Staffan Wall (University of Gothenburg) is acknowledged for the supplying of a du Nouy ring. The Swedish nuclear Fuel and waste management company (SKB) and the European Union FP7 project ACSEPT (project number: 211267) is acknowledged for the funding of this work.