Partitioning of the High Level Radioactive Waste from the Purex Process by 40% TBF in Isoparaffin Using Magnesium Nitrate as a Salting-out Agent

Centrifugal contactor rig trials of the partitioning flowsheet were carried out using simulated and real high level waste solutions obtained by reprocessing of WWER-100 spent nuclear fuel with burn-up of 47 MW day/t. 40% TBP in Isopar M was used as a solvent with magnesium nitrate as a salting-out a...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2024-02, Vol.66 (1), p.44-49
Main Authors: Mamchich, M. V., Naumov, A. A., Goletskii, N. D., Puzikov, E. A., Viznyi>, A. N., Bizin, A. V., Medvedeva, A. I.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Decontamination
High level radioactive wastes
Iron
Magnesium
Nuclear Chemistry
Nuclear fuel reprocessing
Partitioning
Rare earth elements
Salting
Spent nuclear fuels
Zirconium
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Summary:Centrifugal contactor rig trials of the partitioning flowsheet were carried out using simulated and real high level waste solutions obtained by reprocessing of WWER-100 spent nuclear fuel with burn-up of 47 MW day/t. 40% TBP in Isopar M was used as a solvent with magnesium nitrate as a salting-out agent. Complete removal of Cs, Sr, Zr, and Mo to raffinate was achieved. Rare earth elements, Am and Cm were totally concentrated in TPE and REE product. Comparison of the results of this work and previous trials with iron(III) nitrate as a salting-out agent [ 1 ] demonstrated that the use of magnesium nitrate instead of iron(III) nitrate resulted in higher decontamination factors of TPE and REE fraction from Cs (about 10 000) while in the case of iron(III) nitrate they are >7500.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362224010065