Reactor

Noun

 * 1) A person who behaves in response to a suggestion, stimulation or some other influence.
 * 2) A device which uses atomic energy to produce heat.
 * 3) A chemical substance which responds to the presence or contact with another substance.

Thesaurus
atomic pile, breeder reactor, bricks, chain reactor, chain-reacting pile, fast pile, furnace, heterogeneous reactor, homogeneous reactor, intermediate pile, lattice, neutron factory, nuclear furnace, pile, plutonium reactor, power reactor, power-breeder reactor, radioactive waste, reactor pile, rods, slow pile, stellarator, uranium reactor