South Texas Project
| South Texas Nuclear Project (STNP) Electric Generating Station | |
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South Texas Nuclear Project, Units 1 & 2 (NRC image)
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 Location of South Texas Nuclear Generating Station
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| 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 / 28.79556°N 96.04889°WCoordinates: 28°47′44″N 96°2′56″W / 28.79556°N 96.04889°W |
| Status | Operational |
| Construction began | December 22, 1975 |
| 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 | PWR |
| Reactor supplier | Westinghouse |
| Cooling source | Colorado River |
| Power generation | |
| Units operational | 2 × 1280 MW |
| Make and model | WH 4-loop (DRYAMB) |
| Units planned | 2 × 1350 MW ABWR |
| Thermal capacity | 2 × 3853 MWth |
| Nameplate capacity | 2560 MW |
| Capacity factor | 96.95% |
| 2016 output | 21,741 GW·h |
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Website www.stpegs.com |
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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 Unit 2 surpass either of 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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