U.S. Nuclear Plants

South Texas
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Unit 1�� Nuclear system supplied by Westinghouse Electric Corporation
Capacity Net MW(e)	Generation in 2003 Megawatthours	Capacity Factor	Type		On-line Date	License Expiration Date
1,264	6,793,919	61.2%	PWR		March 22, 1988	August 20, 2027
Unit 2�� Nuclear system supplied by Westinghouse Electric Corporation
Capacity Net MW(e)	Generation in 2003 Megawatthours	Capacity Factor		Type	On-line Date	License Expiration Date
1,265	8,894,622	80%		PWR	March 28 1989	Dec. 15, 2027

PWR= Pressurized Light Water Reactor
Note:� Both reactors were previously listed at 1,250 net MW(e) in capacity. The unique reactors feature identifies South Texas 1 and 2 as the largest commercial reactors in the United States.

Ownership: The reactors are operated by the STP Nuclear Operating Company.� Ownership is divided among Reliant Energy HL&P (30.8 percent), San Antonio Public Service Board (28 percent), Central Power & Light (25.2 percent), and Austin Electric Department (16 percent).�

The Impact of the Nuclear Industry on Texas

News items: The Largest (U.S.)
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 902. 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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