#water-cooled_reactor  nuclear reactor using water as a coolant
  supertype:  #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
  subtype:  #boiling_water_reactor__boilingwaterreactor__bwr  a nuclear reactor that uses water as a coolant and moderator; the water boils in the reactor core and the steam produced can drive a steam turbine
  subtype:  #pressurized_water_reactor__pressurizedwaterreactor__PWR  a nuclear reactor that uses water as a coolant and moderator; the steam produced can drive a steam turbine

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