Breeder Fuel Rod
Breeder Fuel Rods are constructed from the more stable uranium isotope, Uranium-238, and are the “fuel” for a larger Breeder Reactor system. To load a Breeder Fuel Rod into a Fission Reactor in a breeder system, hold the Breeder Fuel Rod in your hand and right-click the Fission Reactor. Another right-click will remove the rod.
Breeder Fuel Rods last a long time, but their fuel is eventually spent and they will need to be replaced.