|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization and Modeling of Nuclear Fuels: Microstructure, Thermo-physical Properties
||Centipede: A New Tool for Calculating Irradiation Enhanced Transport of Defects in Nuclear Fuel
||Christopher Matthews, Michael Cooper, Romain Perriot, Xiang-Yang Liu, Chris Stanek, David Andersson
|On-Site Speaker (Planned)
The supersaturation of defects in irradiated nuclear fuel complicates the transport of defects. Coupled with the impacts of temperature and chemistry, the behavior of the defects drives much of the microstructural evolution and subsequent macroscopic performance of fuels. Calculations of defects have traditionally relied on rate theory to estimate defect concentrations to provide meaningful information to fuel performance simulations, albeit with limited scope, and subsequently, poor comparison to experimental measurements. The cluster dynamics code Centipede has been developed to incorporate the hundreds of defects that must be tracked in order to account for the impact of large defect clusters. Through the utilization of an extensive database of atomistic calculations, the mechanistically calculated irradiation enhancement of fission gas in UO2 has been shown to compare favorably with experimental measurements. Centipede has been further refined using machine learning and has been applied to advanced fuels for which data is absent.
||Modeling and Simulation, Nuclear Materials, Computational Materials Science & Engineering