Cleanview

Nuclear power plants in ERCOT

ERCOT has 2 operating nuclear power plants with 5.1 GW of capacity.

  • Operating2

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

The largest nuclear power plants in ERCOT

Operating, by capacity

#Nuclear power plantYear onlineCapacity
1South Texas Project19892,709 MW
2Comanche Peak19932,430 MW

Nuclear power plants that came online most recently in ERCOT

Newest first

#Nuclear power plantYear onlineCapacity
1Comanche Peak19932,430 MW
2South Texas Project19892,709 MW
The developer behind each project is on paid plans. See plans

How Cleanview tracks nuclear power plants

Operating nuclear power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about nuclear power plants in ERCOT

How many nuclear power plants are in ERCOT?
ERCOT has 2 operating utility-scale nuclear power plants with 5.1 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest nuclear power plant in ERCOT?
South Texas Project in Matagorda County, Texas is the largest, at 2,709 MW. It came online in 1989.
How many nuclear power plants were built in ERCOT in 2025?
0 nuclear power plants came online in ERCOT in 2025, with 0 MW of capacity.
Who is developing nuclear power plants in ERCOT?
Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

More energy trackers for ERCOT

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