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Abstract

New solvent extraction processes were developed for the partitioning of the trivalent minor actinides (An), that is americium (Am) and curium (Cm), from the high active raffinate (HAR) of the PUREX process. A multi-step process was considered.

More than 100 extracting molecules were synthesized and studied and about 50 crystal structures of solvates formed between the new extractants and Ln(III) ions were determined. The main milestones of this work include: (i) the successful hot test of the Diamex process in an experimental loop made of centrifugal contractors, (ii) the discovery of the bis-tri-azinylpyridines (called BTPs), a new class of highly efficient selective An(III) extractants over Ln(III) from acidic feed solutions, (iii) the successful semi-hot and hot tests of a SANEX process based on the use of a BTP extractant, using an acidic feed, (iv) the successful spiked-tests of a SANEX process (the so-called ALINA process) based on the use of bis-chlorophenyl-di-thiophosphinic acid plus tri-n-octylphosphine oxide (TOPO) synthetic mixture. .

Additional information

Authors: MADIC C, CEA Marcoule, Bagnois-sur-Cþze (FR);HUDSON M J, University of Reading, Reading (GB);LILJENZIN J O, Chalmers University of Technology, G÷tenburg (SE);GLATZ J P, EC-JRC-ITU, Karlsruhe (DE);NANNICINI R, ENEA, Ispra (IT);FACCHINI A, Politecnico di Milano, Milan (IT);KOLARIK Z, Forschungszentrum Karlsruhe/INE, Karlsruhe (DE);ODOJ R, Forschungszentrum J³lich, J³lich (DE)
Bibliographic Reference: EUR 19149 EN (2000) 286 pp., EUR 45
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-9696-X
Record Number: 200012366 / Last updated on: 2000-09-08
Category: PUBLICATION
Original language: en
Available languages: en