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Oxidative Dissolution of Uranium Dioxide and Triuranium Octoxide in Carbonate Media

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Abstract

Oxidative dissolution of powdered UO2 and U3O8 samples in Na2CO3/NaHCO3–H2O2 solutions was studied. The U3O8 samples were prepared from UO2 at 480–1200°С. The rate and degree of the U3O8 dissolution depend on the characteristics of the oxide powder and on the dissolution temperature. The process rate constants under the conditions of the experiments were calculated. Based on the results obtained, the conditions of complete dissolution of UO2 and U3O8 in Na2CO3/NaHCO3–H2O2 solutions were determined.

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Funding

The study was financially supported by the Russian Science Foundation (project no. 20-63-46006).

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Authors and Affiliations

  1. Mendeleev University of Chemical Technology of Russia, 125047, Moscow, Russia

    N. M. Chervyakov, A. V. Boyarintsev & S. I. Stepanov

  2. Ozersk Institute of Technology, National Research Nuclear University Moscow Engineering Physics Institute, Ozersk, 456783, Chelyabinsk oblast, Russia

    N. M. Chervyakov, A. V. Boyarintsev & S. I. Stepanov

Authors
  1. N. M. Chervyakov
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  2. A. V. Boyarintsev
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  3. S. I. Stepanov
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Correspondence to A. V. Boyarintsev.

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Chervyakov, N.M., Boyarintsev, A.V. & Stepanov, S.I. Oxidative Dissolution of Uranium Dioxide and Triuranium Octoxide in Carbonate Media. Radiochemistry 65, 257–260 (2023). https://doi.org/10.1134/S1066362223020182

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  • DOI: https://doi.org/10.1134/S1066362223020182

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