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Experimental Modeling of Technetium(VII) Recovery from Raffinates after Extractive Reprocessing of Spent Nuclear Fuel

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Abstract

Experimental justification has been provided for the possibility of extractive isolation of technetium from raffinate of technical process of affinage of uranium–plutonium product resulting from hydrometallurgical reprocessing of spent nuclear fuel (SNF). Technetium (VII) from aqueous solution of Zr(IV) (10 g/L) and 4 mol/L HNO3 with small content of ZrOb+ and \({\text{Z}}{{{\text{r}}}_{{\text{2}}}}{\text{O}}_{{\text{3}}}^{{b + }}\) oxocations is recovered by 80% in 30% TBP in hydrocarbon diluent over seven stages of counter-current continuous cascade at ratio O : A = 1 : 1. Variation in phase flow ratio for cascade part leads to virtually complete Tc(VII) extraction in organic phase over ten stages. Technetium(VII) is selectively back extracted from loaded organic phase with water virtually completely over eleven stages of counter-current continuous cascade. Technological extraction scheme for technetium isolation from SNF solutions has been proposed.

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Funding

This work was supported by the Proryv project.

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Authors and Affiliations

  1. Bochvar High-Technology Research Institute of Inorganic Materials, 123098, Moscow, Russia

    A. M. Safiulina, A. V. Anan’ev, A. V. Lizunov, M. V. Logunov & K. N. Dvoeglazov

  2. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia

    A. V. Anan’ev & M. Tuiza

Authors
  1. A. M. Safiulina
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  2. A. V. Anan’ev
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  3. A. V. Lizunov
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  4. M. Tuiza
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  5. M. V. Logunov
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  6. K. N. Dvoeglazov
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Correspondence to A. M. Safiulina.

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Translated by I. Kudryavtsev

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Safiulina, A.M., Anan’ev, A.V., Lizunov, A.V. et al. Experimental Modeling of Technetium(VII) Recovery from Raffinates after Extractive Reprocessing of Spent Nuclear Fuel. Russ. J. Inorg. Chem. 65, 1928–1934 (2020). https://doi.org/10.1134/S0036023620120141

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  • DOI: https://doi.org/10.1134/S0036023620120141

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