pressurized water reactor
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Related to pressurized water reactor: boiling water reactor
pressurized water reactor[′presh·ə‚rīzd ′wȯd·ər rē‚ak·tər]
A nuclear reactor in which water is circulated under enough pressure to prevent it from boiling, while serving as moderator and coolant for the uranium fuel; the heated water is then used to produce steam for a power plant. Abbreviated PWR.