Nick Favorito at the Exelon Corporation Three Mile Island training center simulator. Favorito of New Cumberland is a licensed senior reactor operator at Exelon Corporation’s Three Mile Island nuclear generating station in Londonderry Township, Dauphin County, Pa. The Unit 2 reactor has been closed since March 28, 1979 when a partial meltdown took place. The Unit 1 reactor is still in operation. (Video by Dan Gleiter/PennLive.com)