The Robert Emmett Ginna Nuclear Power Plant, commonly known as Ginna (/ɡɪˈneɪ/ ghih-NAY), 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.

[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.

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 US gallons (6,400 L; 1,410 imp gal) of contaminated water was lost from the reactor.

[11] 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.