Indiana Michigan Power’s Cook Nuclear Plant Unit 2 returned to service April 28 following a refueling outage that began March 21. Indiana Michigan Power is a subsidiary of American Electric Power (NYSE: AEP).
In addition to refueling the reactor and performing regular maintenance and testing work, the 38-day, 16-hour outage also included the installation of new main output transformers.
There is a separate 223-ton transformer for each of the three electric phases of the output of the Unit 2 main generator. The new transformers replace the original transformers that have been in service since the unit began operation in 1978.
Prior to the start of the refueling outage, the unit ran for 471 consecutive days since the previous refueling.
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