|About this Abstract
||Materials Science & Technology 2019
||Materials for Nuclear Applications
||Exploring TRISO Layer Properties and Performance for Multiple Reactor Concepts
||Rachel L. Seibert, Tyler Gerczak
|On-Site Speaker (Planned)
||Rachel L. Seibert
Tristructural-isotropic (TRISO) nuclear fuel has demonstrated excellent performance for high temperature gas reactor concepts. This fuel has been shown to maintain structural integrity and retain most fission products during operation. However, the TRISO concept has not experienced significant innovation since it’s inception. Coating expertise at ORNL is being leveraged to develop new designs and explore TRISO performance. Coating is completed using a fluidized bed chemical vapor deposition system which allows for layers tailored specific to each experimental focus. A number of characterization techniques are used for these studies, primarily including electron microscopy, energy dispersive x-ray spectroscopy, and electron backscatter spectroscopy. Experiments on these novel designs provide information about irradiation performance for other next generation reactor concepts, are used to predict the diffusive release of relevant fission products across silicon carbide and pyrocarbon, and provide an understanding of interfacial mechanical behavior, among other applications.