Generation and Decomposition Behavior of Nitrous Acid during Dissolution of UO2Pellets by Nitric Acid
- 1 April 1991
- journal article
- research article
- Published by Taylor & Francis in Nuclear Technology
- Vol. 94 (1) , 108-113
- https://doi.org/10.13182/nt91-a16226
Abstract
The generation and decomposition behavior of nitrous acid is experimentally investigated during dissolution of unirradiated uranium dioxide (UO2) pellets by a nitric acid solution. The nitrous acid is generated by the dissolution of UO2 and it then decomposes to nitrogen oxides through the solution surface. The generation rate is equal to the dissolution rate of the uranium pellet and it depends on the nitric acid concentration, solution temperature, and effective pellet surface area. The decomposition rate depends on the solution surface area and temperature. These findings allow prediction of changes in nitrous acid concentration during and after dissolution.Keywords
This publication has 4 references indexed in Scilit:
- The Behavior of Iodine in a Simulated Spent-Fuel SolutionNuclear Technology, 1989
- The Composition of NOx Generated in the Dissolution of Uranium DioxideNuclear Technology, 1988
- Kinetics of the dissolution of uranium dioxide in nitric acid. IJournal of Chemical Technology & Biotechnology, 1968
- Dissolution rates of uranium dioxide sintered pellets in nitric acid systemsJournal of Chemical Technology & Biotechnology, 1963