Abstract
Tristructural-isotropic (TRISO) fuel particles are being investigated as a potential fuel for both current and advanced reactors. Due to the size of the particles (<1 mm in diameter with a silicon carbide layer thickness of 30–50 μm), traditional mechanical testing is a challenge, and investigations are limited to micro-scale mechanical testing techniques. In the work presented here, ring crush tests of TRISO particles were performed, and the results are compared with nanoindentation measurements of particles from the same manufactured batch. The elastic modulus results from the nanoindentation and the ring crush tests are found to be in good agreement. In addition, an innovative technique for studying helium implantation effects on the material was investigated utilizing an ORION NanoFab Helium Ion Microscope.
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