** FILE ** Dry cask units store nuclear fuel at the Vermont Yankee nuclear power plant in Vernon, Vt., in June 2009. (AP Photo/Toby Talbot, File)

Photo by: Toby Talbot

** FILE ** Dry cask units store nuclear fuel at the Vermont Yankee nuclear power plant in Vernon, Vt., in June 2009. (AP Photo/Toby Talbot, File)