About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Ceramic Materials for Nuclear Energy Systems
|
Presentation Title |
Atomistic Investigation of Defects and Defect-Phonon Scattering in ThO2 |
Author(s) |
Miaomiao Jin, Beihan Chen, Linu Malakkal, Kaustubh Bawane, Boopathy Kombaiah, Marat Khafizov, David Hurley |
On-Site Speaker (Planned) |
Miaomiao Jin |
Abstract Scope |
Radiation-induced defects and their impact on phonon transport in candidate nuclear fuel ThO2 are extensively evaluated based on atomistic modeling. These efforts include defect formation from primary radiation damage, the property and dynamics of dislocation loops, defects-assisted anion transport, and how these different types of defect degrade thermal conductivity. With a detailed analysis of the defect dynamics, we were able to compare with the experimental characterization of radiation-induced microstructure. In addition, useful information such as phonon-defect scattering cross-section was obtained to provide a quantification of defect impact and can serve as the fundamental input into large-scale computational methods. |