Development and demonstration of a new SANEX Partitioning Process for selective actinide(III)/lanthanide(III) separation using a mixture of CyMe4BTBP and TODGA
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Giuseppe Modolo
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.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Thermodynamics of Np(IV) complexes with gluconic acid under alkaline conditions: sorption studies
- Interaction of uranium(VI) with bioligands present in human biological fluids: the case study of urea and uric acid
- Approach to on-line monitoring of PUREX process using chemometric processing of the optical spectral data
- Development and demonstration of a new SANEX Partitioning Process for selective actinide(III)/lanthanide(III) separation using a mixture of CyMe4BTBP and TODGA
- Solid phase extraction of trivalent actinides and lanthanides using a novel CMPO-RTIL based chromatographic resin
- Stability studies of N,N,N´,N´-tetra-(2-ethylhexyl) dithiodiglycolamide (DTDGA)
- The effect of fluoride and silicate ions on the coprecipitation of gadolinium with calcium in phosphoric and sulpho-phosphoric media
- An electrochemical technique to prepare 55Fe source for the calibration of the X-ray detectors
- A novel and facile approach for the preparation of 133Ba source core, encapsulation and quality evaluation
