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Gas-Phase Conversion of Uranium Mononitride in a Nitrating Atmosphere

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Abstract

Gas-phase conversion of UN to water-soluble compounds in NOx-air, NOx-H2O (vapor)-air, or HNO3 (vapor)-air atmosphere (hereinafter, nitrating atmosphere) at temperatures from 298 to 673 K was studied. The use of the oxidizing atmosphere based on NOx gases allows the conversion to be performed at a lower temperature. The process yields both UO3 and hydrates of UO2(NO3)2. The highest conversion of UN to water-soluble compounds, ∼80%, is reached at ∼565 K. In the course of gas-phase conversion in NOx-H2O (vapor)-air and HNO3 (vapor)-air atmospheres, UN transforms into water-soluble compounds (nitrates, hydroxynitrates). The gas-phase conversion of UN in an NOx-H2O (vapor)-air atmosphere occurs less efficiently than that in an HNO3 (vapor)-air atmosphere.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, korp. 4, Moscow, 119071, Russia

    S. A. Kulyukhin & A. V. Gordeev

  2. Department of Chemistry, Moscow State University, Moscow, Russia

    Yu. M. Nevolin

Authors
  1. S. A. Kulyukhin
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  2. Yu. M. Nevolin
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  3. A. V. Gordeev
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Correspondence to S. A. Kulyukhin.

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Kulyukhin, S.A., Nevolin, Y.M. & Gordeev, A.V. Gas-Phase Conversion of Uranium Mononitride in a Nitrating Atmosphere. Radiochemistry 61, 5–11 (2019). https://doi.org/10.1134/S1066362219010028

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  • DOI: https://doi.org/10.1134/S1066362219010028

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