| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructural, Mechanical, and Chemical Behavior of Solid Nuclear Fuel and Fuel-Cladding Interface II
|
| Presentation Title |
Mitigating FCCI in Metallic Fuels: Evaluating Cladding Liners with Multiscale Modeling |
| Author(s) |
Shehab Shousha, Benjamin Beeler, Larry K. Aagesen, Geoffrey L. Beausoleil II, Nicole Rodriguez Perez, Maria A. Okuniewski |
| On-Site Speaker (Planned) |
Shehab Shousha |
| Abstract Scope |
Fuel-cladding chemical interaction (FCCI) is the primary cause of fuel pin failures in metallic fuels. Using a cladding liner as an interdiffusion barrier is a potential mitigation strategy to inhibit FCCI. These liners aim to limit the diffusion of lanthanide fission products, such as neodymium (Nd) and cerium (Ce), from the fuel to the HT9 cladding, preventing the formation of low-melting-point intermetallic phases. Using a multiscale modeling approach, we evaluate the effectiveness of liner materials, including zirconium, vanadium, and chromium. Density functional theory (DFT) calculations and self-consistent mean field theory analysis were implemented to determine lanthanide diffusivities in various liners. Both bulk and grain boundary diffusion mechanisms are investigated. Additionally, a phase field model was employed to simulate cladding wastage growth due to FCCI, both with and without liners. Our findings suggest that zirconium liners could be highly effective in mitigating FCCI. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Nuclear Materials, |