A fast breeder reactor is an advanced nuclear reactor that can produce more nuclear fuel than it consumes. There are several synonyms for the term "fast breeder reactor", including FBR, breed-and-burn reactor, fast-neutron reactor, and plutonium breeder reactor. These reactors use fast neutrons to produce energy and are designed to maximize the utilization of nuclear fuel. They offer numerous advantages over traditional nuclear reactors, including increased energy production, reduced nuclear waste, and enhanced safety features. These reactors are currently being developed in various countries and are expected to play a key role in meeting the growing global demand for energy in the coming years.