The Ginna plant was the site of a minor nuclear accident when , on January 25 , 1982 , a small amount of radioactive steam leaked into the air after a steam-generator tube ruptured . 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
Three Mile Island accident
Three Mile Island accident
Wayne County, New York