Effects of HCO super(-) sub(3) on the Kinetics of UO sub(2) Oxidation by H sub(2)O sub(2)

• Published in: Journal of nuclear materials Vol. 358; no. 2; p. 202
• Main Authors: Hossain, Mohammad Mohsin, Ekeroth, Ella, Jonsson, Mats
• Format: Journal Article
• Language: English
• Published: 30-11-2006
• ISSN: 0022-3115

The effects of HCO super(-) sub(3) on the kinetics of UO sub(2) oxidation by H sub(2)O sub(2) were investigated. By varying the UO sub(2) surface to solution volume ratio second order rate constants were obtained for HCO super(-) sub(3) concentrations ranging from 0 to 100 mM. The second order rate constant increased linearly with HCO sub(3) super(-) concentration from 0 to approximately 1 mM. The rate constant obtained at HCO super(-) sub(3) concentrations above 1 mM was the true rate constant for oxidation of UO sub(2) by H sub(2)O sub(2). The experimental results were used to estimate the oxidation site density of the powder used and the rate constant for dissolution of UO super(2+) sub(2) from the UO sub(2) surface.