|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization and Modeling of Nuclear Fuels: Microstructure, Thermo-physical Properties
||N-4: Atomistic Modeling of Transport Properties and Interaction with Point Defects of α-U Tilt Grain Boundaries
||Khadija Mahbuba, Benjamin Beeler, Andrea Jokisaari
|On-Site Speaker (Planned)
Metallic fuel has demonstrated excellent safety during off- normal reactor conditions and provides benefits over oxide fuels with respect to ease of fuel fabrication and reprocessing. Though metallic fuel has been used in reactor for over sixty years, many fundamental and thermodynamic properties are still unknown. The anisotropic α-U exists in metallic fuel to some extent. A large amount of initial porosity in metallic fuel forms due to alpha tearing, which is strongly related to grain boundary properties and evolution. In the present study, grain boundary properties of α-U are investigated. Molecular dynamics is utilized to evaluate both the interaction of defects with grain boundaries and the diffusion within grain boundaries. A temperature regime between 300 K and 600 K is considered to explore the thermal dependence of the observed behaviors. Results from the current nanoscale bi-crystalline α-U modeling will be useful in the larger scale poly-crystalline α-U modeling.
||Nuclear Materials, Other, Other