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- Title
Radiation-induced effects during the extraction of Pu-239 nitrate with a solution of tributyl phosphate in octafluoropentanol formal.
- Authors
Belova, Elena V.; Ponomarev, Alexander V.; Smirnov, Anton V.
- Abstract
Extractive treatment of ≥ 0.2 M 239Pu solution in an acidified mixture of tributyl phosphate and octafluoropentanol formal is accompanied by radiolytic degradation of the components. The coefficient of plutonium inter-phase distribution decreases by 4.1 times at 470 kGy α-irradiation dose. Cyclic electron beam radiolysis at 140 kGy increases the residual concentration of plutonium in the organic phase by 3–5 times after re-extraction and by 4–6 times after regeneration. The rate of inter-phase separation is reduced by 5 times during extraction, by 4 times during re-extraction, and by 2–3 times during regeneration. Article highlights: The extractability of 239Pu deteriorates due to the reduction of nitrate ions and their replacement by fluoride ions. The formation of heavy radiolytic products causes an increase in viscosity and a slowdown in phase separation. Regeneration of the organic phase serves as a means of eliminating the negative effect of radiolysis at 50–60 kGy.
- Subjects
TRIBUTYL phosphate; PLUTONIUM oxides; PHASE separation; ELECTRON beams; DENITRIFICATION; RADIOLYSIS; PLUTONIUM; SOLID phase extraction
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 10, p4405
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08511-x