Definition of fast breeder in US English:

fast breeder

(also fast breeder reactor)


  • A breeder reactor in which the neutrons causing fission are not slowed by any moderator.

    • ‘Since the North had no capability of building fast breeder reactors (which use plutonium as fuel), the implication was that the reprocessing plant was part of a nuclear weapons programme.’
    • ‘The expansion calculated by the IAEA could not be realised without an immediate transition to the fast breeders for extending the uranium reserves.’
    • ‘There has been significant progress in the field of atomic energy, including a movement towards achieving a fast breeder reactor.’
    • ‘The highlight of the fast breeder programme is the mastery of a technology using indigenously prepared mixed carbide fuel in the smaller Fast Breeder Test Reactor commissioned in 1985.’
    • ‘The fuel was originally made for the German fast breeder reactor at Kalkar near the Dutch border.’
    • ‘And the government poured billions of dollars into the development of exotic technologies such as fast breeder reactors, which theoretically can produce more plutonium than they consume.’
    • ‘The plutonium was now to be separated out so that it could be recycled into a new type of reactor known as the fast breeder.’


fast breeder

/ˈfæs(t) ˈˌbridər/