Bechtel Plant Machinery Inc., Pittsburgh, Pa., is being awarded a $605,030,234 modification to previously awarded contract (N00024-07-C-2102) for additional naval nuclear propulsion components. Work will be performed in Pittsburgh, Pa. (68 percent) and Schenectady, N.Y. (32 percent). Contract funds will not expire at the end of the current fiscal year. No completion date or additional information is provided on contracts supporting the Naval Nuclear Propulsion Program. The Naval Sea Systems Command, Washington Navy Yard, D.C., is the contracting activity. Science Applications International Corp., San Diego, Calif., is being awarded a $9…