|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Materials Science and Engineering for Nuclear Energy
||Phase-field Modeling of Fission Rate Effect on the Gas Bubble Swelling in U-Mo Fuel
||Linyun Liang, Zhi-Gang Mei, Abdellatif Yacout
|On-Site Speaker (Planned)
U-Mo alloy has been intensively studied as a potential candidate fuel for future high-performance research reactors. Fission-induced swelling is one of major safety concerns in qualifying U-Mo fuel. The formation of intergranular gas bubbles is a major cause of fuel swelling in U-Mo. Recent experimental results indicate that the fission rate might have a significant impact on the fuel swelling at high fission densities. To this end, we developed mesoscale phase-field models to investigate the effect of fission rate on the evolution of intergranular gas bubbles coupled with recrystallization processes in irradiated U-Mo fuel. We systemically study the effect of fission rate on the nucleation and growth of intergranular gas bubbles and recrystallization kinetics by using different grain structures, grain boundary diffusivities, and gas atom resolutions. The current study can provide an improved understanding of the mechanism of fission-induced swelling and therefore better control the swelling in nuclear materials.
||Planned: Supplemental Proceedings volume