R. E. Ginna Nuclear Power Plant

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Ginna nuclear power plant
HD.6D.299 (10824920903).jpg
Ginna nuclear power plant
CountryUnited States
LocationOntario, New York
Coordinates43°16′40″N 77°18′36″W / 43.27778°N 77.31000°W / 43.27778; -77.31000Coordinates: 43°16′40″N 77°18′36″W / 43.27778°N 77.31000°W / 43.27778; -77.31000
Construction beganApril 25, 1966
Commission dateJune 1, 1970
Construction cost$346.15 million (2007 USD)[1]
Nuclear power station
Reactor typePWR
Reactor supplierWestinghouse
Cooling sourceLake Ontario
Power generation
Units operational1 × 580 MW
Nameplate capacity580 MW
Annual net output4930 GW·h
External links
WebsiteGinna Nuclear Power Plant
CommonsRelated media on Commons

The Robert Emmett Ginna Nuclear Power Plant, commonly known as Ginna (/ɡɪˈn/ ghih-NAY), is a nuclear power plant located on the southern shore of Lake Ontario, in the town of Ontario, Wayne County, New York, approximately 20 miles (32 km) east of Rochester, New York.[2] 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 oldest nuclear power reactor still in operation in the United States when the Oyster Creek power plant was permanently shutdown on September 17, 2018.[2]


The plant was named after Robert Emmett Ginna, a former chief executive of Rochester Gas & Electric, who was one of the nation's earliest advocates of using nuclear energy to generate electricity.[3]

Ginna is owned and operated by Exelon after the merger with CENG, who purchased it from Rochester Gas and Electric in 2004.[4][5]

The Ginna plant was the site of a nuclear accident when, on January 25, 1982, a small amount of radioactive steam leaked into the air after a steam-generator tube ruptured.[6][7] The leak which lasted 93 minutes led to the declaration of a site emergency. The rupture was caused by a small pie-pan-shaped object left in the steam generator during an outage. This was not the first time a tube rupture had occurred at an American reactor but following on so closely behind the Three Mile Island accident caused considerable attention to be focused on the incident at the Ginna plant. In total, 485.3 curies of noble gas and 1.15 millicuries of iodine-131 were released to the environment [1] and 1,690 gallons of contaminated water was lost from the reactor.[8]

In 1996 the original Westinghouse supplied steam generators (including the one that was damaged in 1982 and repaired) were replaced by two brand new Babcock & Wilcox steam generators. This project enabled an uprating of Ginna's output several years later and was a major factor in the approval of the plant's operating license extension for 20 years beyond the original license (originally valid until 2009).

Surrounding population[edit]

The Nuclear Regulatory Commission defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone with a radius of 10 miles (16 km), concerned primarily with exposure to, and inhalation of, airborne radioactive contamination, and an ingestion pathway zone of about 50 miles (80 km), concerned primarily with ingestion of food and liquid contaminated by radioactivity.[9]

The 2010 U.S. population within 10 miles (16 km) of Ginna was 66,847, an increase of 12.7 percent in a decade, according to an analysis of U.S. Census data for msnbc.com. The 2010 U.S. population within 50 miles (80 km) was 1,269,589, an increase of 2.1 percent since 2000. Cities within 50 miles include Rochester (17 miles to city center). Canadian population is not included in these figures.[10]

Seismic risk[edit]

The Nuclear Regulatory Commission's estimate of the risk each year of an earthquake intense enough to cause core damage to the reactor at Ginna was 1 in 76,923, according to an NRC study published in August 2010.[11][12]

See also[edit]


  1. ^ "EIA - State Nuclear Profiles". www.eia.gov. Retrieved 3 October 2017.
  2. ^ a b "Constellation Energy Ginna Site Description". Constellation Energy. Archived from the original on September 29, 2007. Retrieved July 9, 2007.
  3. ^ obit. New York Times, May 19, 1996, https://www.nytimes.com/1996/05/19/us/robert-ginna-94-a-champion-of-nuclear-power.html?scp=1&sq=ginna&st=nyt
  4. ^ "Constellation Energy Press Release, June 10, 2004" Archived October 24, 2007, at the Wayback Machine. www.constellation.com. Retrieved 2007-07-09.
  5. ^ http://www.exeloncorp.com/Newsroom/pages/pr_20140401_nuclear_Exelon-CENG_Day_1.aspx
  7. ^ "Nuclear Plant Mishap Is Explained by Utility". The New York Times. March 25, 1982. Retrieved January 9, 2009.
  8. ^ Schlager. When Technology Fails. ISBN 0-8103-8908-8.
  9. ^ "Archived copy". Archived from the original on 2006-10-02. Retrieved 2012-02-08.CS1 maint: archived copy as title (link)
  10. ^ Bill Dedman, Nuclear neighbors: Population rises near US reactors, msnbc.com, April 14, 2011 http://www.msnbc.msn.com/id/42555888/ns/us_news-life/ Accessed May 1, 2011.
  11. ^ Bill Dedman, "What are the odds? US nuke plants ranked by quake risk," msnbc.com, March 17, 2011 http://www.msnbc.msn.com/id/42103936/ Accessed April 19, 2011.
  12. ^ http://msnbcmedia.msn.com/i/msnbc/Sections/NEWS/quake%20nrc%20risk%20estimates.pdf


External links[edit]