Cleanview

Nuclear power plants in New Hampshire

New Hampshire has 1 operating nuclear power plants with 1.2 GW of capacity.

  • Operating1
ManchesterConcordPortsmouth

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

The largest nuclear power plants in New Hampshire

Operating, by capacity

#Nuclear power plantYear onlineCapacity
1Seabrook19901,242 MW

Nuclear power plants that came online most recently in New Hampshire

Newest first

#Nuclear power plantYear onlineCapacity
1Seabrook19901,242 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 New Hampshire

How many nuclear power plants are in New Hampshire?
New Hampshire has 1 operating utility-scale nuclear power plants with 1.2 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest nuclear power plant in New Hampshire?
Seabrook in Rockingham County, New Hampshire is the largest, at 1,242 MW. It came online in 1990.
How many nuclear power plants were built in New Hampshire in 2025?
0 nuclear power plants came online in New Hampshire in 2025, with 0 MW of capacity.
Who is developing nuclear power plants in New Hampshire?
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 New Hampshire

Nuclear power plants in other states

Explore by grid operator