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Palo Verde Nuclear Generating Station Tour

Photo detail

A pressurized water reactor uses three loops of water. A closed loop, heated by the nuclear reactor (red), runs through pipes that heat water in adjacent boilers (orange), causing steam (yellow) to spin turbines and produce electricity. This steam is condensed by cooling water (blue) and returns to the boilers. After this heat exchange, this water (blue) flows back out to the cooling towers, where it is pumped to the top and cools as it falls, as droplets, to the bottom. (APS/Courtesy)