Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 324, Issue 1, Pages 211-218Publisher
SPRINGER
DOI: 10.1007/s10967-020-07072-1
Keywords
Uranium; Dissolution; Kinetics; Activation energy; Solid-liquid reaction; Heterogeneous reactions
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In the present study, the dissolution kinetics of UO2 pellets in nitric acid has been investigated. Kinetic rate expressions based on Langmuir-Hinshelwood mechanism have been developed to describe the kinetics of dissolution of UO2 pellet in nitric acid. Effects of concentration of nitric acid, temperature of the reaction mixture and mixing intensity on the rate of dissolution have also been studied. Analysis of experimental data revealed that the reaction to be in the chemical reaction controlled regime under the experimental conditions with an activation energy estimated to be about 80 kJ mol(-1).
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