The nuclear island (or reactor island) is the heart of a nuclear power station. It contains the nuclear reactor core, reactor pressure vessel, containment building, cooling systems, nuclear reactor safety system and steam raising systems that deliver high pressure steam to the conventional island. The essential parts of the nuclear island are the containment building which houses:
Nuclear reactor containing the nuclear reactor core, control rods and nuclear fuel, the heart of the power station which generates heat for electricity generation. reactor pressure vessel nuclear reactor safety system steam raising systems with condensate feed pumps and steam raising boilers Emergency core cooling systems The containment building sits on the nuclear island basemat. Seismic isolators may be used between the basemat and containment building to increase seismic safety.
References
External links IAEA Nuclear Energy Series ~ Construction Technologies for Nuclear Power Plants (No. NP-T-2.5) by International Atomic Energy Agency