Enriched uranium is a form of Uranium that has been refined and condensed into a piece of fissile material. Enriched uranium comes in two forms, mainly Uranium-235 and Uranium-238. These two isotopes of Uranium serve different uses in nuclear engineering in Atomic Science. Uranium-235 can be used as fissile material and can be crafted into a Fissile Fuel Rod for fission reaction while Uranium-238 is used for breeding depleted fuel rods allowing them to be reused again.
Uranium-235 can be used to craft a fissile fuel rod.