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South Texas Nuclear Generating Station

South Texas Nuclear Project (STNP) Electric Generating Station
South Texas Nuclear Generating Station is located in Texas
South Texas Nuclear Generating Station
Location of South Texas Nuclear Project (STNP) Electric Generating Station in Texas
Country United States
Location Matagorda County, near Bay City, Texas
Coordinates 28°47′44″N 96°2′56″W / 28.79556°N 96.04889°W / 28.79556; -96.04889Coordinates: 28°47′44″N 96°2′56″W / 28.79556°N 96.04889°W / 28.79556; -96.04889
Status Operational
Construction began 1975–89
Commission date Unit 1: August 25, 1988
Unit 2: June 19, 1989
Construction cost $5.5 billion
Owner(s) NRG Energy 44%
City of San Antonio 40%
City of Austin 16%
Operator(s) STP Nuclear Operating Company (STPNOC)
Nuclear power station
Reactor type Pressurized water reactor
Reactor supplier Westinghouse
Cooling source Colorado River
Cooling towers no
Power generation
Units operational 2 × 1,380 MW
Nameplate capacity 2,760 MW
Capacity factor 91.7%
Annual output 22,179 GWh
Website
www.stpegs.com

The South Texas Nuclear Project Electric Generating Station (also known as STNP, STPEGS, South Texas Nuclear Project), is a nuclear power station southwest of Bay City, Texas, United States. The STNP occupies a 12,200-acre (4,900 ha) site on the Colorado River about 90 miles (140 km) southwest of Houston. It consists of two Westinghouse Pressurized Water Reactors and is cooled by a 7,000-acre (2,800 ha) reservoir, which eliminates the need for cooling towers. Only recently did the capacity of Palo Verde Nuclear Generating Station surpass these Texas units.

On December 6, 1971, Houston Lighting & Power Co. (HL&P), the City of Austin, the City of San Antonio, and the Central Power and Light Co. (CPL) initiated a feasibility study of constructing a jointly-owned nuclear plant. The initial cost estimate for the plant was $974 million (equivalent to approximately $5,700,741,167 in 2015 United States Dollars).

By mid-1973, HL&P and CPL had chosen Bay City as the site for the project and San Antonio had signed on as a partner in the project. Brown and Root was selected as the architect and construction company. On November 17, 1973 voters in Austin narrowly approved their city's participation and the city signed onto the project on December 1. Austin held several more referendums through the years on whether to stay in the project or not.

An application for plant construction permits was submitted to the Atomic Energy Commission, now the Nuclear Regulatory Commission (NRC), in May 1974 and the NRC issued the permits on December 22, 1975. Construction started at December 22, 1975.


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