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TRi-structural ISOtropic particle fuel — or TRISO, for short — is a type of micro fuel particle, quite possibly the most robust type of nuclear fuel.
Tristructural isotropic (TRISO) coated particle fuel is the key fuel concept for the high-temperature gas-cooled reactors (HTGRs), selected by the US Department of Energy (US-DOE) [1]. A TRISO fuel particle consists of a fuel kernel of UO2 or UCO and multiple coatings of a porous graphite buffer layer, inner pyrolytic carbon (IPyC) layer, silicon carbide layer as the primary pressure vessel, and a dense outer pyrolytic carbon (OPyC) layer.
The objective of this study is to develop a 3D neutron kinetic (NK) and thermal hydraulic (TH) coupled model using the INL developed code RELAP5-3D©/PHISICS to study the load following operation of a Modular High-Temperature Gas-Cooled Reactor (MHTGR).
Today, the U.S. Department of Energy (DOE) announced more than $65 million in nuclear energy research, cross-cutting technology development, facility access, and infrastructure awards for 93 advanced nuclear technology projects in 28 states.