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Entergy Operations Inc. is now able to increase the power generating capacity of Unit 1 at the Grand Gulf Nuclear Station by 15 percent, the Nuclear Regulatory Commission (NRC) said.

The power uprate for the boiling water reactor near Port Gibson, MS, will increase the plant’s power generating capacity from about 1,300 to 1,500 MWe.

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The NRC staff’s evaluation determined Entergy could safely increase the reactor’s power output primarily by replacing significant portions of several plant systems and components, including the turbine rotors for the reactor feed pumps, power range neutron monitoring system, steam dryer, and the high-pressure turbine.

The NRC’s safety evaluation focused on several areas, including the nuclear steam supply systems, instrumentation and control systems, electrical systems, accident evaluations, radiological consequences, fire protection, operations and training, testing, and technical specification changes.

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The uprate should commence following the spring 2012 refueling outage.

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