|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Rate Theory Simulation of Fission Gas Behavior in U3Si2 under LWR Conditions
||Yinbin Miao, Kyle Gamble, David Andersson, Bei Ye, Mei Zhi-Gang, Gerard Hofman, Abdellatif M Yacout
|On-Site Speaker (Planned)
The rate theory model of the fission gas behavior in U3Si2, a promising ATF candidate, under steady-state and transient LWR conditions was established and parameterized using both experimental and computational references. During steady-state operation, three regimes featuring different fission gas behaviors were identified at various fuel temperatures. At typical LWR temperatures, the overwhelming majority of the fission gas in U3Si2 is retained in intragranular bubbles without causing apparent gas release, providing improved fuel performance compared to UO2. Fission gas behavior and corresponding thermal conductivity degradation correlations were developed based on steady-state rate theory simulations. Additionally, fission gas behavior during a LOCA was studied. A systematic series of LOCA scenarios were investigated with and without taking grain growth and subdivision/recrystallization phenomena into consideration so as to give a comprehensive perspective of U3Si2’s accident tolerance. The rate theory model proves to be a powerful tool to study the fuel performance of U3Si2.
||Planned: Supplemental Proceedings volume