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  • Hansson, Niklas, 1992, et al. (author)
  • XPS study of external α-radiolytic oxidation of UO2 in the presence of argon or hydrogen
  • 2021
  • In: Journal of Nuclear Materials. - : Elsevier BV. - 0022-3115. ; 543
  • Journal article (peer-reviewed)abstract
    • UO2 pellets exposed to 1.85 MBq and 3.30 MBq Am-241 sources with a 30 μm separation in solution were studied under Ar and H2 atmospheres. The 1.85 MBq Am-241 source was shown to have a too low radiolytic production to cause any measurable change in UO2 surface oxidation state. However, a significant oxidation was observed after exposure to the 3.30 MBq source under Ar atmosphere through the production of U(V), as seen from the U4f7/2-peak deconvolution and valence band peak analysis. The H2 atmosphere was shown to suppress the oxidation of the UO2 pellet surface as well as the dissolution in both Milli-Q and NaHCO3 solutions. The dissolved uranium concentration was reduced by a factor 10 under H2 atmosphere as compared to the Ar atmosphere experiments.
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  • Result 1-1 of 1
Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Ekberg, Christian, 1 ... (1)
Spahiu, Kastriot, 19 ... (1)
Hansson, Niklas, 199 ... (1)
Tam, Eric, 1980 (1)
University
Chalmers University of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Engineering and Technology (1)
Year
2021 (1)

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