Zion Nuclear Power Plant

Commonwealth Edison's nuclear power plant in Zion, Ill., shown on August 1986, has been down since February, when an operator unintentionally switched off the reactor, then tried to restart it without conducting the proper safety procedures. A poor showing by the plant and retrained workers during a four-week "demonstration" run has resulted in a delay in its reopening. Originally predicted to open in August, ComEd officials now don't expect it to be producing electricity until October.