IP2 is a four-loop pressurized water reactor designed by Westinghouse. Each of the four loops contains a steam generator and a reactor coolant pump and connecting piping. The reactor coolant pump takes the slightly cooler water from the steam generator and sends it back to the reactor vessel. There are 3,260 metal tubes inside each of the four steam generators at IP2. Hot water from the reactor passes on the inside of the tubes.
Heat passes through the walls of the tubes to boil water on the outside of the tubes.
The steam produced in this way leaves the steam generator via piping called steam lines. The steam lines transport the steam to the turbine where it is used to generator electricity. The steam leaving the turbine is cooled back into water in a large metal box called a condenser. The water from the condenser is pumped back to the steam generator to make more steam. The reactor, the four steam generators, and the four reactor coolant pumps are housed inside the containment building.