Reactors
Unit 1, a first generation Westinghouse pressurized water reactor that operated for 25 years, closed permanently in 1992, and has been dismantled and is used as a storage site for spent fuel. It had a spherical containment of concrete and steel with the smallest wall being 6 feet (1.8 m) thick.
Units 2 and 3, Combustion Engineering pressurized water reactors, generate 1,172 MWe and 1,178 MWe respectively, when operating at 100% capacity.
SONGS had provided about 20% of the power to large portions of Southern California.
Read more about this topic: San Onofre Nuclear Generating Station