Analysis of kinetic data for the dissolution of UO2 fuel pellets in nitric acid

In the present study, the dissolution kinetics of UO 2 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 UO 2 pellet in nitric acid. Effects of concentration of nitric acid, te...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2020-04, Vol.324 (1), p.211-218
Main Authors: Augustine, Elizabeth, Desigan, N., Pandey, N. K., Joshi, J. B.
Format: Article
Language:English
Subjects:
Acids
Chemical reactions
Chemistry
Chemistry and Materials Science
Data analysis
Diagnostic Radiology
Dissolution
Hadrons
Heavy Ions
Inorganic Chemistry
Nitric acid
Nuclear Chemistry
Nuclear Physics
Pellets
Physical Chemistry
Reaction kinetics
Uranium dioxide
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Summary:In the present study, the dissolution kinetics of UO 2 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 UO 2 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 .
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-020-07072-1