South Texas Nuclear Generating Station

South Texas Project (STP) Electric Generating Station
South Texas Project (STP) Electric Generating Station
	South Texas Project, Units 1 & 2 (NRC image)
Official name	South Texas Project Electric Generating Station
Country	United States
Location	Matagorda County, near Bay City, Texas
Coordinates	28°47′44″N 96°2′56″W
Status	Operational
Construction began	December 22, 1975
Commission date	Unit 1: August 25, 1988; Unit 2: June 19, 1989
Construction cost	Units 1–2: $12.55 billion (USD 2010) or $16.5 billion in 2022 dollars
Owner(s)	Constellation Energy (44%); City of San Antonio (40%); City of Austin (16%)
Operator(s)	STP Nuclear Operating Company (STPNOC)
Nuclear power station
Reactor type	PWR
Reactor supplier	Westinghouse
Cooling source	Main Cooling Reservoir (7,000 acres (2,800 ha), up to 202,600 acre-feet (249,900,000 m3) of cooling water storage, filled by pumping water from the Colorado River)
Thermal capacity	2 × 3853 MWth
Power generation
Units operational	2 × 1280 MW
Make and model	WH 4-loop (DRYAMB)
Units cancelled	2 × 1350 MW ABWR
Nameplate capacity	2560 MW
Capacity factor	97.16% (Unit 1, 2017-2019); 98.75% (Unit 2, 2017-2019); 85.6% (Unit 1, lifetime); 85.1% (Unit 2, lifetime)
Annual net output	21,920 GWh (2022)
External links
Website	www.stpnoc.com
Commons	Related media on Commons

The South Texas Project Electric Generating Station (also known as STP, STPEGS, South Texas Project), is a nuclear power station southwest of Bay City, Texas, United States. STP occupies a 12,200-acre (4,900 ha) site west of 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.

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