A Fast Breeder Reactor (FBR) is a type of nuclear reactor that uses fast (high‑energy) neutrons to sustain the fission chain reaction and, at the same time, “breeds” more fissile fuel than it consumes, thereby enhancing the efficiency of nuclear fuel use.

Criticality

  • Criticality is the state in which a nuclear fuel sustains a self-supporting chain reaction. It is the point at which the number of neutrons produced by fission is exactly equal to the number of neutrons lost (through leakage or absorption) plus those causing new fissions.

 

Source: The Indian Express