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Publication - Dr Ross Springell

    Comparing the corrosion of uranium nitride and uranium dioxide surfaces with H2O2

    Citation

    Bright, EL, Rennie, S, Siberry, A, Samani, K, Clarke, K, Goddard, DT & Springell, R, 2019, ‘Comparing the corrosion of uranium nitride and uranium dioxide surfaces with H2O2’. Journal of Nuclear Materials, vol 518., pp. 202-207

    Abstract


    Uranium mononitride, UN, is considered a potential accident tolerant fuel due to its high uranium density, high thermal conductivity, and high melting point. Compared with the relatively inert UO
    2
    , UN has a high reactivity in water, however, studies have not considered the significant effect of radiation, which is known to cause corrosion of UO
    2
    . This study uses 0.1 M H
    2
    O
    2
    to simulate the effects of water radiolysis in order to compare the radiolytic corrosion rates of UO
    2
    , UN, and U
    2
    N
    3
    thin films at room temperature. X-ray reflectivity was used to investigate the changes in film morphology as a function of H
    2
    O
    2
    exposure time, allowing changes in film thickness and roughness to be observed on the Ångstrom length-scale. Results showed significant differences between UO
    2
    , UN, and U
    2
    N
    3
    , with corrosion rates of 0.083(3), 0.020(4), and 0.47(8) Å/s, respectively, showing that UN corrodes more slowly than UO
    2
    in 0.1 M H
    2
    O
    2
    .

    Full details in the University publications repository