# Comanche Peak

ERCOT asset profile · https://askthegrid.com/assets/facilities/comanche-peak

Luminant · Somervell County · ERCOT

Comanche Peak is a two-unit nuclear power plant in Somervell County, Texas, with 2,400 MW of EIA-reported net summer capability. Its Westinghouse four-loop pressurized-water reactors entered commercial service in 1990 and 1993 and map to ERCOT resources CPSES_UNIT1 and CPSES_UNIT2.

## Profile

- **Operating configuration:** Two Westinghouse four-loop pressurized-water reactors, each licensed at 3,612 MW thermal. IAEA PRIS reports 1,205 MW net reference power for Unit 1 and 1,195 MW for Unit 2.
- **ERCOT resources:** CPSES_UNIT1 and CPSES_UNIT2.
- **License terms:** Unit 1 expires February 8, 2050; Unit 2 expires February 2, 2053.

## Metrics

- **Reported capacity:** 2,400 MW — EIA-reported net summer capability; other nameplate and seasonal ratings may differ.
- **Technology:** Nuclear — Primary generation technology.
- **Registry anchor:** Plant 6145 — Somervell County · ERCOT
- **Operating status:** Operating — Comanche Peak is operating.
- **Settlement point:** CPSES_UNIT1 — ERCOT settlement point.
- **Commercial operation:** August 13, 1990 — Unit 1; Unit 2 entered commercial operation August 3, 1993.
- **Resource stack:** 2 resources — CPSES_UNIT1 · CPSES_UNIT2

## Facts

- **Reported capacity:** 2,400 MW — EIA net summer capability · confidence: high
- **Reactors:** 2 operating units — Westinghouse four-loop PWRs · confidence: high
- **Commercial operation:** 1990 / 1993 — Units 1 and 2 · confidence: high
- **Owner:** Luminant Generation Company LLC — Vistra subsidiary · confidence: high
- **NRC operator:** Vistra Operations Company LLC — Units 1 and 2 · confidence: high
- **License expiration:** 2050 / 2053 — Units 1 and 2 · confidence: high

## Related parties

- **Operator:** Luminant Generation Company LLC — Operator for Comanche Peak ([source](https://luminant.com/))

## Sources

- [Comanche Peak Unit 1](https://www.nrc.gov/info-finder/reactors/cp1) — U.S. Nuclear Regulatory Commission · regulatory — Current operator, reactor type, licensed thermal power, and license expiration for Unit 1.
- [Comanche Peak reactors](https://pris.iaea.org/pris/CountryStatistics/ReactorDetails.aspx?current=729) — IAEA PRIS · regulatory — Unit ownership, capacity, construction, grid-connection, and commercial-operation records.
- [Comanche Peak power agreement](https://www.sec.gov/Archives/edgar/data/1692819/000119312525221774/d43667d8k.htm) — Vistra Corp. SEC filing · filing — The 1,200 MW, 20-year power agreement announced September 29, 2025.

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Canonical page: https://askthegrid.com/assets/facilities/comanche-peak
Website: [Vistra Corp](https://vistracorp.com/)
Profile published: 2026-07-17T03:34:09.577Z
Source: Ask the Grid — https://askthegrid.com/