| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Improved Techniques for Determining Local Thermal Transport in Composite Nuclear Fuels |
| Author(s) |
Scott C. Middlemas, Joshua Kane, Tsvetoslav Pavlov, Boopathy Kombaiah, Daniel LaBrier, Yu-lin Shen, Isabella Van Rooyen |
| On-Site Speaker (Planned) |
Scott C. Middlemas |
| Abstract Scope |
Various composite fuel systems are currently being developed for greater accident tolerance in light water reactors, higher efficiency in advanced gas-cooled reactors, and lower enrichment for high-performance research reactors. While the use of dispersed phase/multilayered fuel forms have several advantages over monolithic forms, they also pose additional challenges in characterizing and modeling reactor performance. Accurate knowledge of thermal conductivity in the various layers/phases of the composite is required for predicting fuel temperature profiles. In this presentation, we will discuss various laser based thermoreflectance techniques that have been employed to determine the mesoscale thermal transport of several different types of composite fuels with micron level spatial resolution. Where possible, the local thermal transport measurements and microstructures of post-irradiated specimens are compared with those of pre-irradiated specimens and correlated to show the degradation of thermal transport due to the evolution of fission gas bubbles and other irradiation induced defects. |
| Proceedings Inclusion? |
Planned: |