#nuclear_reactor__reactor  (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
  supertype:  apparatus.equipment__apparatu__setup  equipment designed to serve a specific function
  subtype:  atomic_pile  breeder_reactor {fast_reactor thermal_reactor}  gas-cooled_reactor  liquid_metal_reactor  thermonuclear_reactor  water-cooled_reactor
  part:  control_rod__controlrod  a steel or aluminum rod that can be moved up or down to control the rate of the nuclear reaction
  part:  core.chamber  the chamber of a nuclear reactor containing the fissile material where the reaction takes place
  part:  moderator.inhibitor  any substance used to slow down neutrons in nuclear reactors

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