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A new procedure for preparing mixed uranium-plutonium dioxide

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Radiochemistry Aims and scope

Abstract

Addition of aqueous ammonia and hydroxylamine hydrochloride to a nitric acid solution containing U(VI) and Pu(VI) causes at pH ∼7 precipitation of a mixture of U(VI) hydroxylaminate and Pu(III) hydroxide. The precipitate separated from the mother liquor and dried at 60°C upon further calcination in air at 300°C transforms into a solid solution of PuO2 in UO2 as a result of thermal decomposition of the precipitate with the reduction of U(VI) to U(IV) by the ligand coordinated to the uranyl ion. The developed procedure for preparing mixed U-Pu dioxide can become an alternative to the presently used method for preparing uranium dioxide and mixed uranium-plutonium oxide fuel (MOX fuel) by heating at 800–900°C in a reducing atmosphere.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia

    E. G. Il’in & A. G. Beirakhov

  2. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia

    Yu. M. Kulyako, T. I. Trofimov, M. D. Samsonov & B. F. Myasoedov

Authors
  1. E. G. Il’in
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  2. A. G. Beirakhov
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  3. Yu. M. Kulyako
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  4. T. I. Trofimov
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  5. M. D. Samsonov
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  6. B. F. Myasoedov
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Corresponding author

Correspondence to Yu. M. Kulyako.

Additional information

Original Russian Text © E.G. Il’in, A.G. Beirakhov, Yu.M. Kulyako, T.I. Trofimov, M.D. Samsonov, B.F. Myasoedov, 2010, published in Radiokhimiya, 2010, Vol. 52, No. 4, pp. 297–299.

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Il’in, E.G., Beirakhov, A.G., Kulyako, Y.M. et al. A new procedure for preparing mixed uranium-plutonium dioxide. Radiochemistry 52, 350–353 (2010). https://doi.org/10.1134/S106636221004003X

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  • DOI: https://doi.org/10.1134/S106636221004003X

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