|About this Abstract
||MS&T23: Materials Science & Technology
||Ceramics for New Generation Nuclear Energy System Application
||Thermal Property Mapping of Surrogate TRISO Particles
||Michael J. Moorehead, Zilong Hua, Boone Beausoleil, David Hurley
|On-Site Speaker (Planned)
||Michael J. Moorehead
TRistructual ISOtropic (TRISO) fuels are a proposed fuel form for next-generation, high-temperature reactors. TRISO fuels are typically composed of a uranium-bearing ceramic fuel kernel, coated in multiple layers of pyrolytic carbon and silicon carbide to contain fission products and provide structural integrity. Since the primary purpose of a nuclear reactor is to extract heat from nuclear fuel, it is important to understand the thermal transport within each layer of TRISO particles over a broad temperature range. Much of the literature has focused on the bulk thermal properties of TRISO compacts or inferred the thermal properties of these layers from optical anisotropy measurements. In this work, we directly measure and map the thermal diffusivities of multiple surrogate TRISO particles using spatial-domain and frequency-domain thermoreflectance measurements. Through both techniques, the thermal anisotropy of each layer can be examined as well as the evolution of thermal properties from room temperature to 1000 °C.