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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.


IMPACT FACTOR 2017: 1.202

CiteScore 2017: 1.22

SCImago Journal Rank (SJR) 2017: 0.409
Source Normalized Impact per Paper (SNIP) 2017: 0.869

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2193-3405
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Volume 97, Issue 9

Issues

Recovery of U and Pu from simulated spent nuclear fuel by adducts of organic reagents with HNO3 followed by their separation from fission products by countercurrent chromatography

Boris F. Myasoedov / Yu. M. Kulyako
  • 1 Russian Academy of Sciences, V. I. Vernadsky Institute of Geochemistry , Moscow, Russische Föderation
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/ T. I. Trofimov
  • 2 Vernandsky Institue of Geochemistry and Analytical Chemistry of Russian academy of sciences, Moskau, Russische Föderation
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/ M. D. Samsonov
  • 3 Vernadsky Institue of Geochemistry and Analytical Chemistry of Russian academy of sciences, Moskau, Russische Föderation
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/ D. A. Malikov
  • 4 Russian Academy of Sciences, V. I. Vernadsky Institute of Geochemistry, Moscow, Russische Föderation
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/ T. A. Mariutina
  • 5 Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian academy of sciences, Moskau, Russische Föderation
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/ B. Ya. Spivakov
  • 6 Russian Academy of Sciences, V. I. Vernadsky Institute of Geochemistry, Moscow, Russische Föderation
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Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/ract.2009.1649

Abstract

The primary patterns of isolation of actinides from their dioxides with supercritical carbon dioxide containing adducts of tri-n-butyl phosphate and other organic reagents with nitric acid has been investigated. The effective extraction of actinides from their dioxides was achieved using these adducts under common (ambient) conditions without supercritical carbon dioxide, which makes the performance of the process significantly easier. Extraction of uranium and the primary fission products from a simulated spent nuclear fuel has been studied. It was shown that at almost quantitative extraction of U (>99%), most 95Zr and 95Nb (up to 90%) as well as 131I, partially 103Ru (∼30%), 99Tc (20%) and lanthanides (up to 10%) also passed into the adduct phase. In this case complete separation of U from 137Cs, 85Sr, 140Ba as well as from the bulk of 140La, 141–144Ce and 147Nd was observed. After dissolution of the adduct containing U and partially fission products in liquid carbon dioxide the extract was transported into a separation column of a planetary centrifuge, and separation of U from remaining fission products was performed by countercurrent chromatography in the dynamic mode.

Keywords: Supercritical and liquid carbon dioxide; Actinides; Fission products; Actinides oxides; Organic ligands

About the article

* Correspondence address: Russian Academy of Sciences, V. I. of Geochemistry and Analytical Chemistry, Kosygin Str. 19, 119991 Moscow, Russische Föderation,


Published Online: 2009-09-25

Published in Print: 2009-08-01


Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, Volume 97, Issue 9, Pages 473–477, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2009.1649.

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