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South Texas Project 1 (STP) Lifecycle: Commissioned Reactor: ONLINE

STP Nuclear Operating Company · South Texas Project

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Contact Information

Address: 8 miles west of Wadsworth on Farm Road 521
Palacious, TX 77465

Phone: (512) 972-3611

Website: http://www.nrgenergy.com/

Technical Specifications

Reactor Type: PWR ( PWR-DRYAMB)

Net Output: 1280 MWe

Thermal Power: 3853 MWt

Efficiency: 33.22%

Licensing & Regulatory Details

Docket #: 05000498

License #: NPF-76 ( OL-FP)

Construction Permit: 1975-12-22

Operating License: 1988-03-22

License Renewed: 2017-09-28

Commercial Ops: 1988-08-25

Expiration Date: 2047-08-20

Site History & Construction

NSS Supplier: WEST 4LP

Constructor: EBSO

Architect Engineer: BECH

Current Reactor Status (NRC Data)

100%

ONLINE

Report Date:

March 9, 2026

Lifecycle: Commissioned | Reactor: ONLINE

Recent Power History

Date	Power Level	Visual
Mar 9	100%
Mar 6	100%
Mar 5	100%
Mar 4	94%
Mar 3	14%
Mar 2	15%
Mar 1	100%
Feb 28	100%
Feb 27	100%
Feb 26	100%
Feb 25	100%
Feb 24	100%
Feb 23	100%
Feb 22	100%

Upcoming Outage

Start Date	Duration
2026-03-20	32 Days

Facility Statistics

Lifecycle & Tenure

Op. Age: 37.5 Yrs

Build Time: 12.7 Yrs

Lic. Remain: 21.4 Yrs

Production & Power

Lifetime CF: 89.9%

Efficiency: 33.2%

Generated: 274.1 TWh

Reliability & Outages

Record Run: 580 Days

Refuelings (Since '99): 17

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