| About this Abstract |
| Meeting |
Materials Science & Technology 2019
|
| Symposium
|
Materials for Nuclear Applications
|
| Presentation Title |
Anisotropic Thermal Transport in Uranium Dioxide Induced by Dislocation |
| Author(s) |
Suvash Ghimire, Bowen Deng |
| On-Site Speaker (Planned) |
Suvash Ghimire |
| Abstract Scope |
Thermal conductivity of uranium dioxide (UO2) is an important factor in nuclear reactor systems, as it impacts the thermal behavior of fuel during burn-up. During burn-up, the UO2 fuel pellets generate fairly high amounts of microstructures including dislocations that adversely affect the thermal behavior of the fuel. In this work, we used molecular dynamics to investigate the effect of dislocations on thermal conductivity of UO2. Most of the thermal transport research uses heat flux in the direction perpendicular to the dislocation, but in this research, we calculated the thermal conductivity of UO2 applying heat flux both in parallel and perpendicular to the direction of dislocation and compared their results. Furthermore, to understand the effect of temperature and size on thermal transport, we carried out the investigation at different temperatures and different sizes of UO2 structure. |