April 26, 2002 — FirstEnergy Nuclear Operating Co. (FENOC) announced it has submitted its plan to the Nuclear Regulatory Commission (NRC) regarding repair of the reactor pressure vessel head at the Davis-Besse Nuclear Power Station.
The plan calls for cutting out the corroded area of the reactor head and welding in a 6-inch thick, corrosion-resistant nickel alloy plate. The plate will be about 17-1/2 inches in diameter and cover the Control Rod Drive Mechanism nozzle opening adjacent to the corroded area, as well as another nozzle opening near the corrosion.
A preliminary plan called for cutting out a 13-inch diameter area around the corrosion damage, and repairing the nozzle near the corrosion. In the submitted plan, the diameter of the repair was enlarged to encompass the other nearby nozzle to make the overall area stronger. The plan applies the governing codes and NRC regulations.
As a result, the cost of repair is now expected to be approximately $25m. With NRC approval of the repair plan and completion of the repairs, the company hopes to have Davis-Besse in service during the third quarter. Based on this timetable, the company has secured on-peak energy to replace generation from Davis-Besse through the end of August. Net replacement power costs are expected to be between $10 and $15m/month through June, and between $20 and $25m/month for July and August.
Davis-Besse is owned by Akron, Ohio-based FirstEnergy Corp. , and operated by its subsidiary FirstEnergy Nuclear Operating Company. FirstEnergy is a registered public utility holding company.