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1242 MW Nuclear operating in Rockingham, NH
1,242 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1990
Operating Since
Coordinates
42.8981, -70.8562
County
Rockingham, NH
Nearby Plants
Forward-looking, asset-specific exposure analytics combining climate hazards, generation variability, and counterparty risk into a single decision-grade view. Powered by InfraRisk.
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Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | NextEra Energy Seabrook LLC | Public Service CO of New Hampshire | NextEra Energy Resources |
| Owner(s) | City of Taunton, Massachusetts Mun Wholes Electric Co, NextEra Energy Seabrook LLC, Town of Hudson - (MA) | Public Service CO of New Hampshire | — |
| Status | Operating | cancelled | — |
GEM identifies the owner as Public Service CO of New Hampshire
This entity is not yet in the GEM ownership database — chain unavailable.
The Seabrook Nuclear Power Plant, more commonly known as Seabrook Station, is a nuclear power plant located in Seabrook, New Hampshire, United States, approximately 40 miles (64 km) north of Boston and 10 miles (16 km) south of Portsmouth. It has operated since 1990. With its 1,244-megawatt electrical output, Seabrook Unit 1 is the largest individual electrical generating unit on the New England power grid. It is the second largest nuclear plant in New England after the two-unit Millstone Nuclear Power Plant in Connecticut.
Read more on WikipediaSeabrook Station is a 1242 MW nuclear power plant located in Rockingham County, New Hampshire. It began operating in 1990 and is owned and operated by NextEra Energy Seabrook LLC. The plant is the largest in New Hampshire and ranks 38th out of 55 nuclear plants nationally. It has a single nuclear reactor.
In the most recent year with available data, Seabrook generated 10,910,165 MWh of electricity, operating at a 99.9% capacity factor. The plant is located within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
345.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
927.2K MWh
Latest Month
10.9M MWh
Annual Generation
99.9%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Point of Interconnection
Nearest Substation
Seabrook Transition Station · 345 kV
Substation Distance
0.156 km
Operator
NextEra Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.SEABROOK24.5SBRK
Pricing Hub
.Z.NEWHAMPSHIRE
Location Type
NETWORK NODE
Node Source
Curated node match
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
View all 10 articlesForward forecasts, scenario decomposition, and risk-decision tooling for this asset.