| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
|
| Presentation Title |
Mesoscale Modeling of Thermal Conductivity of a UO2 and BeO Composite Nuclear Fuel |
| Author(s) |
Karim Ahmed, Sean Mcdeavitt |
| On-Site Speaker (Planned) |
Karim Ahmed |
| Abstract Scope |
A hybrid phase field and finite-element model was developed to simulate the effective thermal conductivity of UO2-BeO nuclear fuel with different microstructural features. The effects of second-phase (BeO) fraction and morphology, temperature, and interface thermal resistance were investigated. The model predicts that the continuous second phase configuration has a higher effective thermal conductivity than the dispersed second phase configuration for the same volume fraction and temperature. Companion experiments were conducted to validate the model predictions. It was demonstrated that accounting for the interface (Kapitza) thermal resistance is necessary to improve the model predictions. The difference between the model calculations and the experimental results were about 5%, which is within the precision of the experimental measurements. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |