OAK HARBOR, Ohio - Federal regulators say they won't allow an Ohio nuclear reactor to reopen until they find out more about cracks discovered in concrete at the plant along Lake Erie.
The Nuclear Regulatory Commission says it wants to make sure that the tiny cracks found on the outside of the reactor containment building don't pose a safety threat at the Davis-Besse plant outside Toledo.
The Blade newspaper in Toledo (http://bit.ly/vznrJn ) reports that plant operators this week expect to patch an area of the building that was cut open so that they could replace its reactor head.
The plant was shut down in October for installation of the 82-ton reactor head. Soon afterward, crews discovered a 30-foot hairline crack in the outer wall.