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

STP Nuclear Operating Company · South Texas Project
Matagorda Beach - Late 80's
Matagorda Beach - Late 80's

Contact Information

Address: 8 miles west of Wadsworth on Farm Road 521
Palacious, TX 77465
Phone: (512) 972-3611

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