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The effect of Al concentration on thermodynamic properties of Nd and U in Ga–Al-based alloys and the separation factor of Nd/U couple in a “molten salt-liquid metal system”

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Abstract

Electrochemical behavior of neodymium and uranium in a molten Nd(U)–(Ga–xAl)/3LiCl–2KCl system (x = 1.5; 5.0 and 20.0 wt% Al) between 723 and 823 K was studied. Temperature dependencies of apparent standard potentials of Nd–(Ga–Al) and U–(Ga–Al) alloys were determined versus Cl−/Cl2 reference electrode. Neodymium and uranium activity coefficients and Nd/U separation factor were calculated. Partial excess free Gibbs energy, partial enthalpy of mixing and partial excess entropy of Nd–(Ga–Al) and U–(Ga–Al) alloys were estimated.

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Acknowledgments

The work was supported by Act 211 Government of the Russian Federation, Contract № 02.A03.21.0006.

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Authors and Affiliations

  1. Institute of High-Temperature Electrochemistry UB RAS, 20 Akademicheskaya St., Ekaterinburg, Russia, 620137

    Valeri Smolenski & Alena Novoselova

  2. Department of Rare Metals and Nanomaterials, Institute of Physics and Technology, Ural Federal University, 21 Mira St., Ekaterinburg, Russia, 620002

    Valeri Smolenski, Alena Novoselova, Vladimir Volkovich & Alexander Osipenko

  3. JSC “State Scientific Centre-Research Institute of Atomic Reactors”, Dimitrovgrad, Russia, 433510

    Vladimir Volkovich, Yana Luk’yanova & Alexander Osipenko

  4. National Research Nuclear University, 31 Kashirskoe highway, Moscow, Russia, 115409

    Alexander Bychkov

  5. Energy Process Developments Ltd., London, SE1 4AG, UK

    Trevor R. Griffiths

Authors
  1. Valeri Smolenski
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  2. Alena Novoselova
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  3. Vladimir Volkovich
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  4. Yana Luk’yanova
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  5. Alexander Osipenko
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  6. Alexander Bychkov
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Correspondence to Valeri Smolenski.

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Smolenski, V., Novoselova, A., Volkovich, V. et al. The effect of Al concentration on thermodynamic properties of Nd and U in Ga–Al-based alloys and the separation factor of Nd/U couple in a “molten salt-liquid metal system”. J Radioanal Nucl Chem 311, 687–693 (2017). https://doi.org/10.1007/s10967-016-5053-5

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  • DOI: https://doi.org/10.1007/s10967-016-5053-5

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