| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Radiation Effects on Phonon Transport in UO2 and ThO2 |
| Author(s) |
Tiankai Yao, Vinay Chauhan, Maniesha Singh, Amey Khanolkar, Zilong Hua, Marat Khafizov, Matthew Mann, Thierry Wiss, Anter El-Azab, Jian Gan, David Hurley, Lingfeng He |
| On-Site Speaker (Planned) |
Lingfeng He |
| Abstract Scope |
The degradation of thermal conductivity of nuclear fuels under high radiation environment affects the energy conversion efficiency as well as reactor safety margins. For oxide nuclear fuels, phonon scattering by point defects, extended defects such as dislocation loops and bubbles, and grain boundaries plays a significant role in limiting the thermal transport properties. The 5f elections in UO2 may affect the defect evolution in a different manner than that in ThO2, which does not contain 5f electrons. In this work, the effects of point defects and extended defects on the phonon transport in UO2 and ThO2 have been investigated on ion irradiated samples by using multimodal microscopy and spectroscopy and thermal property measurement.
This work is supported as part of the Center for Thermal Energy Transport under Irradiation, an Energy Frontier Research Center, funded by the U.S. Department of Energy Office of Sciences. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |