Its lifecycle from ore processing to the long-term storage of nuclearįuel and represent a central focus of nuclear forensic investigations. Signatures of nuclear material vary throughout UO 4, which can likely be attributed to its larger surfaceĪrea and porous starting material morphology. ![]() To hydrate more quickly than α-U 3O 8 from UO 4 had more apparent change with increasing aging time. Were found to have distinguishing morphologic characteristics (93.2% Morphologic effects were studied via scanning electron microscopyĪnd 12-way classification via machine learning. Interval, crystallographic changes were measured via powder X-rayĭiffraction coupled with whole pattern fitting for quantitative analysis. Samples were analyzedĪt varying intervals of 14, 24, 36, 43, and 54 days. Of 12 “high” hours of 45 ☌ and 90% RH, and 12 ForĪging, a humidity chamber was programmed for continuous daily cycles UO 4 is comprised of subrounded particles, while α-U 3O 8 from AUC contains blocky, porous particles approximatelyĪn order of magnitude larger than particles from UO 4. Via the washed uranyl peroxide (UO 4) and ammonium uranylĬarbonate (AUC) synthetic routes to produce unaged starting materials ![]() Knowledge of U-oxide hydration as a result of synthetic route andĮnvironmental conditions, ultimately giving novel insight into nuclear Relative humidity (RH) have been examined. Morphological changes of α-U 3O 8 following
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