Pressurized water reactor

A pressurized water reactor or PWR is a nuclear reactor that heats water into steam to turn a turbine to generate electricity. PWRs use water to cool the reactor and keeps the water pressurized to prevent boiling. Hot water is then cycled into a vat where it is boiled to produce steam which turns a turbine to produce electricity. The steam is then condensed into water that is cycled back into the reactor housing for cooling.