It is the AP 1000 reactor, a pressurized water reactor, sold by Westinghouse Electric Co.

WSJ: GE Steps Up Aid in Reactor Crisis

Finland is using a new breed of pressurized water reactor that is being built by a German-French consortium for around three billion euros.

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The 825-megawatt pressurized water reactor at Three Mile Island, about 10 miles outside Harrisburg, Pennsylvania, has been in service since 1974 and can power about 800, 000 homes.

CNN: Pump triggers Three Mile Island reactor shutdown, NRC says

The pressurized water reactor plant is currently supplying 60 megawatts to the Iranian power grid, but will produce a whopping 1, 000 megawatts when operating at full capacity, according to the International Atomic Energy Agency (IAEA).

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