Skip to main content Accessibility help
×
Home

Sensitivity of UO2 Stability in a Reducing Environment on Radiolysis Model Parameters

  • Richard S. Wittman (a1) and Edgar C. Buck (a1)

Abstract

Results for a radiolysis model sensitivity study of radiolytically produced H2O2 are presented as they relate to Spent (or Used) Light Water Reactor uranium oxide (UO2) nuclear fuel (UNF) oxidation in a low oxygen environment. The model builds on previous reaction kinetic studies to represent the radiolytic processes occurring at the nuclear fuel surface. Hydrogen peroxide (H2O2) is the dominant oxidant for spent nuclear fuel in an O2-depleted water environment. The most sensitive parameters have been identified with respect to predictions under typical conditions. As compared with the full model with about 100 reactions, it was found that only 30 to 40 of the reactions are required to determine [H2O2] to one part in 10–5 and to preserve most of the predictions for major species. This allows a systematic approach for model simplification and offers guidance in designing experiments for validation.

Copyright

References

Hide All
1. Pastina, B. and LaVerne, J. A., Effect of Molecular Hydrogen on Hydrogen Peroxide in Water Radiolysis, J. Phys. Chem. A 105 (2001) 93169322.
2. Christian, H. and Sunder, S., Calculations of radiation induced corrosion of UO2 in solutions containing carbonate, STUDSVIK/M-96/4.
3. Christensen, H. and Sunder, S., An evaluation of water layer thickness effective in oxidation of UO2 fuel due to radiolysis of water, J. Nucl. Mater., 238 (1996) 7077.
4. Kline, A. J., The Dissolution Rate of Unirradiated UO2 under Repository Conditions: The Influence of Fuel and Water Chemistry, Dissolved Oxygen, and Temperature, Doctoral Thesis submitted to the University of Missouri-Columbia, 2008.
5. Radulescu, G., Radiation Transport Evaluations for Repository Science, ORNL/LTR-2011/294, LETTER REPORT, Oak Ridge National Laboratory, August, 2011.
6. Eriksen, T. E., Shoesmith, D. W., Jonsson, M., Radiation induced dissolution of UO2 based nuclear fuel – A critical review of predictive modeling approaches, Journal of Nuclear Materials, 420(2012) 409423.
7. Shoesmith, D.W., Kolar, M., and King, F., A Mixed-Potential Model to Predict Fuel (Uranium Dioxide) Corrosion within a Failed Nuclear Waste Container, Corrosion 59(2003) 802816.

Keywords

Related content

Powered by UNSILO

Sensitivity of UO2 Stability in a Reducing Environment on Radiolysis Model Parameters

  • Richard S. Wittman (a1) and Edgar C. Buck (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.