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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year

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Rank 6 out of 34 in category Nuclear Science & Technology in the 2012 Thomson Reuters Journal Citation Report/Science Edition

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Development and demonstration of a new SANEX Partitioning Process for selective actinide(III)/lanthanide(III) separation using a mixture of CyMe4BTBP and TODGA

Giuseppe Modolo* / A. Wilden1 / H. Daniels2 / Andreas Geist3 / Daniel Magnusson4 / Rikard Malmbeck5

1Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Jülich, Deutschland

2Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, Jülich, Deutschland

3Karlsruher Institut für Technologie (KIT), Institut für Nukleare Entsorgung (INE), Karlsruhe, Deutschland

4Karlsruher Institut für Technologie (KIT), Institut für Nukleare Entsorgung (INE), Karlsruhe, Deutschland

5European Commission JRC, Institute for Transuranium Elements (ITU), Karlsruhe, Deutschland

* Correspondence address: Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research, IEK-6, Nuclear Waste Management and Reactor Safety, 52425 Jülich, Deutschland,

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology. Volume 101, Issue 3, Pages 155–162, ISSN (Print) 2193-3405 , DOI: 10.1524/ract.2013.2016, January 2013

Publication History:
Published Online:
2013-01-28

Abstract

Within the framework of the European collaborative project ACSEPT, a new SANEX partitioning process was developed at Forschungszentrum Jülich for the separation of the trivalent minor actinides americium, curium and californium from lanthanide fission products in spent nuclear fuels. The development is based on batch solvent extraction studies, single-centrifugal contactor tests and on flow-sheet design by computer code calculations. The used solvent is composed of 6,6´-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydrobenzo-[1,2-4]trizazin-3-yl)-[2,2´]-bipyridine (CyMe4BTBP) and N,N,N´,N´-tetraoctyldiglycolamide (TODGA) dissolved in n-octanol. A spiked continuous counter-current test was carried out in miniature centrifugal contactors with the aid of a 20-stage flow-sheet consisting of 12 extraction, 4 scrubbing and 4 stripping stages. A product fraction containing more than 99.9% of the trivalent actinides Am(III), Cm(III) and Cf(III) was obtained. High product/feed decontamination factors >1000 were achieved for these actinides. The trivalent lanthanides were directed to the raffinate of the process with the actinide (III) product stream being contaminated with less than 0.5 mass-% in the initial lanthanides.

Keywords: SANEX; Minor actinides; Americium; Curium; Partitioning

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