|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Impact of Lithium Accommodation on Defect Chemistry in ZrO2
||Gareth F. Stephens, Yan Ren Than
|On-Site Speaker (Planned)
||Gareth F. Stephens
Identifying the mechanism by which Li accelerates zirconium alloy corrosion will allow new alloying additions to be considered and new water chemistry regimes to be investigated, improving the efficiency and performance of future nuclear power reactors, reducing the cost of operation and design.
Density functional theory (DFT) was used to identify the most stable accommodation mechanisms for Li in ZrO2 at an atomic scale through the binding properties of valance electrons. A Brouwer diagram has been developed using Fermi-Dirac statistics that predicts the nature of the defect structures and their competing species concentrations. This was then combined with experimental data to corroborate the most stable accommodation mechanisms of Li in ZrO2. The solubility of Li in bulk ZrO2 is predicted to be low indicating that accelerated corrosion due to bulk Li accommodation is unlikely.
||Modeling and Simulation, Other,