Reprocessing of simulated voloxidized uraniumeoxide SNF in the CARBEX processстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:The concept of a new method, the CARBEX (CARBonate EXtraction) process, was proposed for reprocessing
of spent uranium oxide fuel. The proposed process is based on use of water solutions of Na2CO3 or
(NH4)2CO3 and solvent extraction (SE) by the quaternary ammonium compounds for selective recovery
and purification of U from the fission products (FPs). Applying of SE allows to reach high degree of
purification of U from FPs. Carrying out the processes in poorly aggressive alkaline carbonate media leads
to increasing safety of SNF's reprocessing and better selectivity of separation of lanthanides and actinides.
Moreover carbonate reprocessing media allows to carry out a recycling and regeneration of reagents.
We have been done laboratory scale experiments on the extraction components of simulated
voloxidated spent fuel in the solutions of NaOH or Na2CO3eH2O2 and recovery of U from carbonate
solutions by SE method using carbonate of methyltrioctylammonium in toluene. It was shown that the
purification factors of U from impurities of simulated FPs reached values 103e105. The received results
support our opinion that CARBEX after the further development can become more safe, simple and
profitable method of spent fuel reprocessing.