Seabrook
Nuclear power plant in Rockingham County, New Hampshire. 1,242 MW of nameplate capacity across 1 generator, operated by NextEra Energy Seabrook LLC.
Also known as Seabrook Station · EIA plant 6115
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,242 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- August 1990First generator online
- Operator
- NextEra Energy Seabrook LLCEIA operator ID 6854
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Rockingham County, NH42.8992, −70.8489
- EIA plant ID
- 6115EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Seabrook produces
Free · EIA-923Net generation, 2025
10.9 TWh
10,910,165 MWh, final
Capacity factor, 2025
100.3%
2024: 88.7%
January to July 2026
5.31 TWh
Provisional
Range, 2015 to 2025
9.5–10.9
TWh a year. Low 2015, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 7,921,880 | Not reported | 12 of 12 |
| 2001 | 8,692,743 | Not reported | 12 of 12 |
| 2002 | 9,294,617 | Not reported | 12 of 12 |
| 2003 | 9,276,288 | Not reported | 12 of 12 |
| 2004 | 10,177,573 | Not reported | 12 of 12 |
| 2005 | 9,455,885 | Not reported | 12 of 12 |
| 2006 | 9,397,856 | Not reported | 12 of 12 |
| 2007 | 10,763,884 | Not reported | 12 of 12 |
| 2008 | 9,350,314 | Not reported | 12 of 12 |
| 2009 | 8,816,673 | Not reported | 12 of 12 |
| 2010 | 10,910,055 | 100.3% | 12 of 12 |
| 2011 | 8,362,807 | 76.9% | 12 of 12 |
| 2012 | 8,189,181 | 75.1% | 12 of 12 |
| 2013 | 10,926,725 | 100.4% | 12 of 12 |
| 2014 | 10,168,265 | 93.5% | 12 of 12 |
| 2015 | 9,484,204 | 87.2% | 12 of 12 |
| 2016 | 10,761,163 | 98.6% | 12 of 12 |
| 2017 | 9,990,704 | 91.8% | 12 of 12 |
| 2018 | 10,061,696 | 92.5% | 12 of 12 |
| 2019 | 10,906,923 | 100.2% | 12 of 12 |
| 2020 | 9,865,196 | 90.4% | 12 of 12 |
| 2021 | 9,856,117 | 90.6% | 12 of 12 |
| 2022 | 10,921,528 | 100.4% | 12 of 12 |
| 2023 | 9,534,781 | 87.6% | 12 of 12 |
| 2024 | 9,676,862 | 88.7% | 12 of 12 |
| 2025 | 10,910,165 | 100.3% | 12 of 12 |
| 2026 (provisional, partial year) | 5,306,770 | 84.0% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ISONEEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
214,057
million gallons
Consumption, 2024
0
million gallons
Source
Atlantic Ocean
Surface, Saline. Once-through
Watershed stress
Very low/none · 0.126
USGS SUI, HUC12 Hampton River
12 of 12 cooling months report withdrawal. Saline, brackish or ocean intake; not tested. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Nuclear | 1,242.0 | August 1990 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists NextEra Energy Seabrook LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Seabrook
How much power does Seabrook produce?
Seabrook reported 10,910,165 MWh (10.9 TWh) of net generation in 2025, a 100.3% capacity factor on 1,242 MW of nameplate capacity. From January to July 2026 it reported 5.31 TWh, which is provisional.
Where is Seabrook?
Seabrook is in Rockingham County, New Hampshire, at 42.8992, −70.8489. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Seabrook?
EIA-860M for August 2026 lists NextEra Energy Seabrook LLC as the operator (EIA operator ID 6854). The operator is not always the owner.
When did Seabrook start operating?
Its first generator began operating in August 1990, according to EIA-860M.
Does InfraMap have power prices for Seabrook?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Seabrook, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page