“…Depending on the core design, FHR coolant salt will be in direct contact with SiC layers in certain regions of the fuel matrix holding the TRISO fuel. These carbon-based materials are generally inert towards fluoride salts but can corrode when in contact with metal impurities (e.g., Ni and Cr) that may be present in the coolant salt as well as oxygen [236,237]. In addition, the molten salt structure at the solid-liquid interface may differ from the bulk.…”