The San Onofre Nuclear Generating Station (SONGS) is a nuclear power plant located on the Pacific coast of California. The 84-acre (34 ha) site is in the northwestern corner of San Diego County, south of San Clemente, and surrounded by the San Onofre State Park and next to the I-5 Highway.

San Onofre Nuclear Generating Station Unit 1 is no longer in service and has been dismantled. It is being 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. This reactor was a first generation Westinghouse pressurized water reactor that operated for 25 years, closing permanently in 1992. Units 2 and 3, Combustion Engineering pressurized water reactors, continue to operate and generate 1,172 MWe and 1,178 MWe respectively.

The nuclear power plant is operated by Southern California Edison. Edison International, parent of SCE, holds 78.2% ownership in the plant; San Diego Gas & Electric Company, 20%; and the City of Riverside Utilities Department, 1.8%. The plant employs over 2000 people.

San Onofre Nuclear Generating Station
Country United States
Locale San Diego County, California
Status Operational
Commission date August 8, 1983 (Unit 2)
April 1, 1984 (Unit 3)
Licence expiration Unit 2: February 16, 2022
Unit 3: November 15, 2022
Decommission date November 30, 1992 (Unit 1)
Operator(s) Southern California Edison

Reactor information
Reactors operational 1 x 1172 MW
1 x 1178 MW
Reactor type(s) pressurized water reactor
Reactor supplier(s) Westinghouse (Unit 1)
Combustion Engineering (Units 2 & 3)

Power generation information
Annual generation 17,204 GW·h