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@ARTICLE{SerranoPurroy:48085,
author = {Serrano-Purroy, D. and Baron, P. and Christiansen, S. H.
and Glatz, J.-P. and Madic, C. and Malmbeck, R. and Modolo,
G.},
title = {{F}irst demonstration of a centrifugal solvent extraction
process for minor actinides from a concentrated spent fuel
solution},
journal = {Separation and purification technology},
volume = {45},
issn = {1383-5866},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-48085},
pages = {157 - 162},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {The efficiency of minor actinides (MA) recovery in the
diamide extraction (DIAMEX) process has already been
demonstrated using high active raffinate (HAR). In view of
an industrial application, the next development step aims at
the partitioning of MA from high active concentrate (HAC) as
feed. The volume reduction reduces the size of the
installation, and thereby the amount of waste and the costs
of the process. In this work, MA recovery by DIAMEX
partitioning using genuine HAC has for the first time been
demonstrated. The experiment was successfully carried out in
a 16-stage centrifugal extractor battery, installed in the
hot cell facilities at ITU, using
N,N'-dimethyl-N,N'-dioctyl-2-(2-(hexyloxy)ethyl)-malonamide
(DMDOHEMA) as extractant. In order to produce a
representative HAC, a concentration-denitration process was
applied to a genuine HAR solution produced by small scale
plutonium uranium redox extraction (PUREX) reprocessing of a
mixed oxide (MOX) fuel solution. In the DIAMEX process, five
extraction stages were sufficient to achieve feed
decontamination factors above 10,000 for Am and Cm.
Co-extraction of molybdenum, zirconium and palladium was
prevented using oxalic acid and HEDTA scrubbing. The
back-extraction proved to be very efficient, yielding in
four stages recoveries for Am and Cm in the product fraction
above 99.7 and $99.9\%,$ respectively, which can be further
improved by process flowsheet optimisation. This work is a
major contribution in the field of partitioning and an
important step towards the industrial implementation of MA
partitioning. (C) 2005 Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {ISR},
ddc = {540},
cid = {I:(DE-Juel1)VDB182},
pnm = {Nukleare Sicherheitsforschung},
pid = {G:(DE-Juel1)FUEK249},
shelfmark = {Engineering, Chemical},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000231999200011},
doi = {10.1016/j.seppur.2005.03.001},
url = {https://juser.fz-juelich.de/record/48085},
}