|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Gaseous Fission Product Swelling Behavior in U3Si2 Fuel
||Kyle Gamble, Tommaso Barani, Davide Pizzocri, Giovanni Pastore, Yinbin Miao, Jason Hales
|On-Site Speaker (Planned)
The gaseous swelling behavior of U<SUB>3</SUB>Si<SUB>2</SUB> fuel is an important phenomenon to understand in order to assess the accident tolerance of U<SUB>3</SUB>Si<SUB>2</SUB> under light water reactor conditions. The existing experimental data are for low temperature research reactor conditions. Therefore, multiscale modeling approaches are used to investigate the gaseous swelling behavior under commercial reactor conditions.
In this presentation, three different approaches for modeling gaseous swelling in U<SUB>3</SUB>Si<SUB>2</SUB> are described. The empirical model is a function of burnup fitted to the low temperature research reactor data. The rate theory model utilizes the GRASS-SST code to develop a temperature, temperature gradient, and burnup dependent model. The U<SUB>3</SUB>Si<SUB>2</SUB>FissionGas model is a coupled fission gas swelling and release model that relies on a physically based description and material parameters from recent lower-length scale calculations. These approaches have been added to the BISON fuel performance code to facilitate comparisons for a normal operation power history.
||Planned: Supplemental Proceedings volume