This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1016/j.pnucene.2013.07.021 in citations.
Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning
Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning
Two full continuous countercurrent processes for the recovery of trivalent actinides (An(III)) from a simulated PUREX raffinate solution (HAR) were developed and demonstrated using miniature laboratory-scale centrifugal contactors: the innovative SANEX and the 1-cycle SANEX processes. The innovative...
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Personal Name(s): | Modolo, G. (Corresponding author) |
---|---|
Wilden, A. / Kaufholz, P. / Bosbach, D. / Geist, A. | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | Progress in nuclear energy, 72 (2014) S. 107-114 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2014
|
DOI: |
10.1016/j.pnucene.2013.07.021 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Safety Research for Nuclear Waste Disposal |
Publikationsportal JuSER |
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245 | |a Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning | ||
260 | |a Amsterdam [u.a.] |c 2014 |b Elsevier Science | ||
520 | |a Two full continuous countercurrent processes for the recovery of trivalent actinides (An(III)) from a simulated PUREX raffinate solution (HAR) were developed and demonstrated using miniature laboratory-scale centrifugal contactors: the innovative SANEX and the 1-cycle SANEX processes. The innovative SANEX process was successfully demonstrated in a 16 + 16 stage flow sheet. In the first 16 stages, Am(III), Cm(III), and Ln(III) were quantitatively co-extracted from the HAR by a TODGA-based extractant. The decontamination factors (DFs) for the major non-lanthanide fission products were >103. The loaded extractant was then subjected to two stripping steps using the second 16 stages of the flow sheet. The first stripping step concerned the selective stripping of Am(III) + Cm(III) at fairly high acidity (0.35 ML−1 HNO3) with the new hydrophilic N-chelating selective ligand SO3-Ph-BTP. High An(III) recoveries >99.8% were achieved with high decontamination factors toward the trivalent lanthanides. In the second step, the residual stripping of Ln(III) from loaded organic phase was carried out quantitatively using 0.5 ML−1 citric acid solution at pH 3. However, Ru proved to be the only exception and remained to a large extent (12.8%) in the spent extractant. A more challenging route also studied at our laboratories is the 1-cycle SANEX process, i.e. direct An(III) separation from HAR using an extractant mixture of CyMe4BTBP and TODGA in 1-octanol/TPH diluent. A demonstration process was also successfully implemented using a 16 + 16 stage flow sheet on the above-mentioned laboratory-scale centrifugal contactor rig. It was demonstrated that a selective extraction and high recovery of >99.8% of Am(III) and >99.4% Cm(III) was achieved with low contamination of fission products. Both new processes are major contributions to the field of partitioning and important steps forward toward the industrial implementation of MA partitioning. | ||
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