# R.E. Ginna Nuclear Power Plant NYISO nuclear_power_plant · https://askthegrid.com/nyiso/assets/plant/r-e-ginna-nuclear-power-plant R.E. Ginna Nuclear Power Plant, also marketed as the R.E. Ginna Clean Energy Center, is a single-unit Westinghouse pressurized-water reactor near Ontario in Wayne County, New York. It began commercial operation in July 1970 and is currently operated by Constellation Energy Generation, LLC under NRC Facility Operating License No. DPR-18. The facility can produce up to 576 MW of electricity and is located on 426 acres along the south shore of Lake Ontario. The current operating license expires September 18, 2029, and a subsequent renewal application was filed in June 2026 for an additional 20-year operating term. ## Key facts - Technology: Nuclear - Power capacity: 614 MW ## Grid and market context - ISO/RTO: NYISO - Balancing authority: NYISO ## Source-backed facts - Identity.identifiers.eia plant id: 6122 — eia.gov · confidence: review_required - Identity.identifiers.nrc docket: 50-244 — nrc.gov · confidence: review_required - Identity.identifiers.nrc license: DPR-18 — federalregister.gov · confidence: review_required - Technical.site acres: 426 acres — nrc.gov · confidence: review_required - Technical.commercial operation date: July 1970 — nrc.gov · confidence: review_required - Operations.license expiration: September 18, 2029 — federalregister.gov · confidence: review_required ## Timeline - 1965-10-01 — Construction permit and operating license application filed Rochester Gas and Electric filed the application for a construction permit and operating license. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 1966-04-25 — Construction permit issued The NRC issued the construction permit for the R.E. Ginna Nuclear Power Plant. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 1969-09-19 — Initial provisional operating license issued The NRC issued the initial provisional operating license for the R.E. Ginna Nuclear Power Plant. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 1970-07-01 — Commercial operation begins Ginna Station began commercial operation at 1,300 MWt licensed thermal power and 420 MW net electrical output. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 1972-03-01 — Initial power increase Licensed thermal output increased to 1,520 MWt and net electrical output increased to 490 MW. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 2004-05-20 — New York PSC approves Ginna transfer to Constellation The New York Public Service Commission issued an order approving the transfer of Ginna from Rochester Gas & Electric to Constellation Energy entities, finding the sale in the public interest. Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BB3FD61B5-DC60-4366-9F40-F5EF8F3F37AA%7D) - 2004-06-14 — Ginna acquisition completed Constellation Energy completed its acquisition of the R.E. Ginna Nuclear Power Plant from Rochester Gas and Electric for $401 million (excluding $21.6 million for purchased nuclear fuel and the $202 million decommissioning fund transfer). Source: nucnet.org (https://www.nucnet.org/news/sale-of-us-ginna-nuclear-plant-completed) - 2006-07-11 — Extended power uprate approved NRC Amendment No. 97 approved a 16.8% extended power uprate, increasing steady-state thermal power from 1,520 MWt to 1,775 MWt and the design electrical rating from 470 MW to 585 MW; project was completed during the October 2006 refueling outage. Source: nrc.gov (https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) - 2014-04-01 — Direct operating-authority transfer to Exelon Generation NRC approved direct transfer of operating authority to Exelon Generation. The order states that ownership was not affected and that no physical or day-to-day operational changes were proposed. Source: nrc.gov (https://www.nrc.gov/docs/ML1406/ML14063A211.pdf) - 2019-11-20 — EDF put option announcement for 49.99% CENG stake Exelon Generation announced that EDF was exercising its put option to sell its 49.99% indirect interest in Ginna and other jointly owned nuclear facilities. The announcement stated that the purchase would have no impact on plant operations or employees. Source: constellationenergy.com (https://www.constellationenergy.com/news/2019/exelon-generation-to-begin-negotiations-to-acquire-full-ownershi.html) - 2021-08-10 — Exelon completes acquisition of EDF's CENG stake Exelon Generation completed its acquisition of EDF's 49.99% interest in CENG for $885 million, making Exelon the sole CENG shareholder and 100% indirect owner of Ginna. Source: enerdata.net (https://www.enerdata.net/publications/daily-energy-news/edf-completes-sale-its-50-interest-us-nuclear-group-ceng.html) - 2026-06-17 — Subsequent license-renewal application filed Constellation Energy Generation, LLC submitted an application seeking authorization to operate Ginna for an additional 20 years beyond the current license term, which expires September 18, 2029. Source: federalregister.gov (https://www.federalregister.gov/documents/2026/06/29/2026-13026/constellation-energy-generation-llc-re-ginna-nuclear-power-plant-subsequent-license-renewal) ## Sources - [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BB3FD61B5-DC60-4366-9F40-F5EF8F3F37AA%7D) — documents.dps.ny.gov · tier authoritative - [rbj.net](https://rbj.net/2003/11/28/energy-giant-to-add-ginna-to-holdings/) — rbj.net · tier public_source - [constellationenergy.com](https://www.constellationenergy.com/news/2019/exelon-generation-to-begin-negotiations-to-acquire-full-ownershi.html) — constellationenergy.com · tier public_source - [eia.gov](https://www.eia.gov/nuclear/generation/xls/usreact26.xlsx) — eia.gov · tier authoritative - [enerdata.net](https://www.enerdata.net/publications/daily-energy-news/edf-completes-sale-its-50-interest-us-nuclear-group-ceng.html) — enerdata.net · tier public_source - [federalregister.gov](https://www.federalregister.gov/documents/2026/06/29/2026-13026/constellation-energy-generation-llc-re-ginna-nuclear-power-plant-subsequent-license-renewal) — federalregister.gov · tier authoritative - [nrc.gov](https://www.nrc.gov/docs/ML1406/ML14063A211.pdf) — nrc.gov · tier authoritative - [nrc.gov](https://www.nrc.gov/docs/ML1915/ML19150A432.pdf) — nrc.gov · tier authoritative - [nrc.gov](https://www.nrc.gov/docs/ML2329/ML23291A081.pdf) — nrc.gov · tier authoritative - [nrc.gov](https://www.nrc.gov/reactors/operating/licensing/power-uprates/pwr-epu/ginna-pu) — nrc.gov · tier authoritative - [nucnet.org](https://www.nucnet.org/news/sale-of-us-ginna-nuclear-plant-completed) — nucnet.org · tier public_source ## Data quality - Asset identity is resolved: The exact plant is the single-unit R.E. Ginna Nuclear Power Plant, EIA ID 6122, NRC License DPR-18, Docket 50-244, located in Wayne County, New York. Canonical name and identifiers are supported by authoritative government, NRC, and owner sources. Equipment scope supported by source-backed NRC UFSAR and inspection records: Westinghouse PWR/NSSS with two reactor-coolant loops; Westinghouse turbine-generator (496.322 MW max guaranteed); two Babcock & Wilcox replacement steam generators installed 1996 with Alloy 690TT tubes. Commercial operation date confirmed as July 1970 by both NRC UFSAR and EIA records. Extended power uprate (EPU) completed October 2006, approved NRC Amendment No. 97 on July 11, 2006, increased thermal power from 1,520 MWt to 1,775 MWt and design electrical rating from 470 MW to 585 MW. Current owner-stated capacity is 576 MW. Ownership history post-2004: Exelon acquired indirect control through 2012 merger with Constellation Energy Group (50.01% of CENG); EDF held 49.99% through 2021. Current regulatory status: Operating license expires September 18, 2029; subsequent renewal application filed June 17, 2026 seeking additional 20-year term. NYISO market participant; balancing authority NYISO; no conflicting capacity or status information identified. No material conflicts identified; all major facts are supported by multiple authoritative sources (NRC, regulatory filings, owner, EIA, market operator). --- Canonical page: https://askthegrid.com/nyiso/assets/plant/r-e-ginna-nuclear-power-plant Source: Ask the Grid — https://askthegrid.com/