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614 MW Nuclear operating in Wayne, NY
614 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1970
Operating Since
Coordinates
43.2777, -77.3099
County
Wayne, NY
Nearby Plants
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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 | Constellation Nuclear | Exelon Generation | Exelon |
| Owner(s) | Constellation Nuclear | Exelon | — |
| Status | Operating | operating | — |
The Robert Emmett Ginna Nuclear Power Plant, commonly known as Ginna, is a nuclear power plant located on the southern shore of Lake Ontario, in the town of Ontario, Wayne County, New York, United States, approximately 20 miles (32 km) east of Rochester, New York. It is a single unit Westinghouse 2-Loop pressurized water reactor, similar to those at Point Beach, Kewaunee, and Prairie Island. Having gone into commercial operation in 1970, Ginna became the second oldest nuclear power reactor, after Nine Mile unit 1, still in operation in the United States when the Oyster Creek power plant was permanently shut down on September 17, 2018.
Read more on WikipediaThe R.E. Ginna Nuclear Power Plant is a 614 MW nuclear power facility located in Wayne County, New York. The plant began operating in 1970 and is owned by Exelon, with Constellation Nuclear as the operator. It consists of a single nuclear generator. Ginna is connected to the New York Independent System Operator (NYISO) grid and falls within the North American Electric Reliability Corporation (NERC) NPCC region.
In the most recent year with available data, the plant generated 5,034,798 MWh of electricity, achieving a capacity factor of 93.6%. Ginna is the third-largest of three nuclear plants in New York state, and ranks as the 54th largest of 55 nuclear plants nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
NYISO
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
New York Independent System Operator (NYIS)
Grid Voltage
115.0 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.
430.1K MWh
Latest Month
5.0M MWh
Annual Generation
93.6%
Capacity Factor
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Point of Interconnection
Nearest Substation
GINNA____
Substation Distance
< 10 km
Coord Source
NYISO direct
Market Position
ISO/RTO Market
NYISO
LMP Node
—
Pricing Hub
GENESE
Node Source
Shared substation inference
Substation identified. Node ID not yet resolved against ISO roster.
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 2026-04-09
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Exelon and Rochester Gas & Electric signed a $17.5M/month reliability agreement securing Ginna's continued operation.
sourceEDF Group exercised put option to sell its 49.99% stake in three New York nuclear plants (including Ginna) to Exelon Generation, consolidating full Exelon ownership prior to the 2022 Constellation spinoff.
source