UO2

Uranium dioxide (UO2) is a ceramic compound and the primary fuel form in nuclear reactors, valued for its high heavy metal density and thermal conductivity in the nuclear power industry. It is used almost exclusively as pelletized fuel in light-water reactors (LWRs) and other reactor types, where its chemical stability and established performance under extreme neutron irradiation make it the industry standard. Engineers select UO2 for nuclear applications because of its proven operational reliability, well-understood behavior during thermal cycling and burnup, and compatibility with standard fuel cladding materials, though specialized knowledge of nuclear materials science is required for design and safety analysis.