MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Nuclear power station at night. Leibstadt boiling water reactor (BWR) nuclear power station in Leibstadt, Switzerland. The reactor is housed in the domed building, a cooling tower is also seen (centre). A BWR is a design in which water is used as both the coolant and the moderator. The moderator slows down the neutrons emitted by nuclear fission, in order to sustain a chain reaction. The water boils in the reactor core and the resulting steam is used to drive a turbine, generating electricity.
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