Answer: atomicpile

AnswerCrossword Clue
ATOMICPILEReactor
ATOMICPILENuclear reactor
ATOMICPILEEnergy source since 1942
ATOMICPILEEarly nuclear reactor
ATOMICPILEIt produces chain reactions.
ATOMICPILENuclear reactor.
ATOMICPILEChain reaction facilitator