U.S. Nuclear Plants

San Onofre
California

Unit 2 Nuclear system supplied by Combustion Engineering, Inc.
Capacity Net MW(e)	Generation in 2003 Megawatthours	Capacity Factor	Type	On-line Date	License Expiration Date
1,070	9,712,482	103.3%	PWR	Sept. 7, 1982	Feb. 16, 2022
Unit 3 Nuclear system supplied by Combustion Engineering, Inc.
Capacity Net MW(e)	Generation in 2003 Megawatthours	Capacity Factor	Type	On-line Date	License Expiration Date
1,080	8,596,268	90.6%	PWR	Sept. 16, 1983	Nov. 15, 2022

PWR=Pressurized Light Water Reactor

Description: The 84-acre site is near San Clemente, California, in San Diego County. Unit 1 is no longer in service. This reactor was a first generation Westinghouse commercial unit that operated for 25 years, closing permanently in 1992.

Ownership: San Onofre power plant is operated by Southern California Edison Company. The ownership set up is as follows: Edison International (75.1 percent), San Diego Gas & Electric Company (20 percent), Anaheim Public Utilities Department (3.2 percent), and the Riverside Utilities Department (1.8 percent).

The Impact of the Nuclear Industry on California:

News items
Highlights
Nuclear-provided Electricity Generation
Competition in the State Electricity Market
Environmental Trends: Emissions levels
Various Links to related sites.

Sources: Capacity, for purposes of this report, is the net summer capability as reported in Energy Information Administration (EIA) survey form 860, "Annual Electric Generator Report." Capacity Factor is a calculation in which the maximum possible generation (based on net summer capability) is divided into the actual generation than multiplied by 100 to get a percentage. Generation is the electricity output reported by plant owners on EIA survey form 906. Type of Unit: All U.S. commercial reactors currently in operation are one of two types: BWR (boiling water reactor) or PWR (pressurized light water reactor). The type is identified in EIA's Nuclear Power Generation and Fuel Cycle Report. Both the On-line Date and the License Expiration Date are reported annually in Information Digest by the U.S. Nuclear Regulatory Commission.

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