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  1. pressurized-water reactor

    • IPA[ˈpreSHəˌrīzd ˌwôdər rēˈaktər]
    • n.
      a nuclear reactor in which the fuel is uranium oxide clad in zircaloy and the coolant and moderator is water maintained at high pressure so that it does not boil at the operating temperature of the reactor.
    • noun: pressurized-water reactor, plural noun: pressurized-water reactors