How big is Comanche Peak?

Comanche Peak reports 2,430 MW nuclear of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

What kind of plant is Comanche Peak?

Comanche Peak is a nuclear facility in Somervell County, TX, participating in the ERCOT market.

Where is Comanche Peak located?

Comanche Peak is in Somervell County, TX, inside the ERCOT balancing area.

Who operates Comanche Peak?

Comanche Peak is operated by Luminant Generation Company LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Comanche Peak generate?

Comanche Peak reported 20,024.3 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

Where does Comanche Peak connect to the grid?

Comanche Peak settles at CPSES_UNIT1.

How does Comanche Peak compare to other plants?

By capacity, Comanche Peak ranks #13 of 54 operating plants of the same technology nationally. It ranks #2 of 2 in TX.

Comanche Peak — 2,430 MW nuclear plant, Somervell County, TX

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Comanche Peak — 2,430 MW nuclear plant, Somervell County, TX · Ask the Grid

Generation and physical site

EIA plant 6145 · Inventory for Sep 2026.

Reported operating nameplate by technology

Nuclear: 2,430 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (2)

EIA generator status and nameplate capacity for Comanche Peak
Generator	Technology	Status	Power (MW)	Energy (MWh)
1	Nuclear	Operating	1,215	Unknown
2	Nuclear	Operating	1,215	Unknown

Physical map location · OpenStreetMap: 32.29823, -97.79216
Filed location · EIA: 32.29836, -97.78552

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Jan 23, 2023
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Current generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
1	1,215 MW 1,205 MW summer	Nuclear ST	Aug 1990	Operating
2	1,215 MW 1,195 MW summer	Nuclear ST	Apr 1993	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 2,430 MW; Nuclear
National rank: #13; of 54 operating peers
TX rank: #2; of 2 operating peers

Monthly generation

Download CSV

Latest 12 months

20.02 TWh

Reported net generation

Latest report

Jul 2026

EIA-923 monthly filing

2025 capacity factor

93.2%

Using current reported nameplate capacity

Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.

ERCOT disclosed dispatch

2 ERCOT market resources · Nuclear

Generation

3 mo through Aug 28, 2026

Avg output

2,375 MW

Peak output

2,419 MW

Capacity factor

98%

Uptime

100%

Capacity factor is average output vs. this plant's observed peak.

Output by hourlocal time · 90 days through Aug 28, 2026

0:006:0012:0018:0024:00

Latest disclosed outputhourly · 2 weeks ending Aug 28, 2026

Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.

Settlement price economics

Observed ERCOT settlement prices at CPSES_UNIT1 over 365 days (2025-10-27 to 2026-10-26). This plant is also crosswalked to CPSES_UNIT2; the point with the deepest price history is shown.

Average price: $30.17/MWh
Hourly range: -$218 to $1,256
Negative price hours: 416
TB2 spread benchmark: $49.2/kW-yr

The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Land and environmental record

Air Permit

Permit No. 101442

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 101442

Air Permit

Permit No. 19225

TCEQ AIR NEW SOURCE PERMITS; PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 19225

Air Permit

Permit No. 34242

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 34242

Air Permit

Permit No. 80034

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 80034

Coordinate Parcel Area

2025

351.25 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 5776; SOMERVELL APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 5776

Mapped facility footprint

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorContractorRelated asset

Parties and identifiers

OrganizationRoleBasis

Luminant Generation Company LLCOperatorOperator for Comanche Peak

CPSES_UNIT1, CPSES_UNIT2Market resourcesLinked ERCOT resources.

Reporting portfolio

EIA reporting entity

Luminant Generation Company LLC

Entity 55983

Operating portfolio

13 plants

2 states

Reported capacity

11,291.7 MW

Batteries · Conventional Steam Coal · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Comanche PeakCurrent	2,430 MW	TX
Martin Lake	2,379.6 MW	TX
Oak Grove (TX)	1,795.4 MW	TX
Lake Hubbard	927.5 MW	TX
Stryker Creek	713.4 MW	TX
Graham	634.7 MW	TX

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

Related assets

South Texas Project

Midlothian Energy Facility

Forney Energy Center

Wolf Hollow II

Martin Lake

Limestone

Units and generators

Performance

Peer context

Monthly generation

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Aug 28, 2026

Latest disclosed outputhourly · 2 weeks ending Aug 28, 2026

Settlement price economics

Grid and market context

Market registration

Operating context

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

Sources

Common questions about Comanche Peak

How big is Comanche Peak?

What kind of plant is Comanche Peak?

Where is Comanche Peak located?

Who operates Comanche Peak?

How much electricity does Comanche Peak generate?

Where does Comanche Peak connect to the grid?

How does Comanche Peak compare to other plants?

Co-located assets

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