Although at full reactor power, the electrical output will be reduced by an annual average of approximately 70MW because the repaired low-pressure turbine rotors do not include the largest row of blades. New low-pressure turbine rotors that support full electrical output will be installed in the fall of 2011.
The 1,030MW unit had been out of service since September 2008 when turbine vibrations, caused by broken low-pressure turbine blades, damaged the turbine generator, support structures and associated systems.
Cook unit 1 is now scheduled for refueling in March 2010. While there would be sufficient fuel to operate for a longer period, the refueling will be done to maintain a site refueling schedule that does not require both units to be off line at the same time.
