Indiana Michigan Power’s Cook Nuclear Plant Unit 1 was returned to service on Sunday, September 4, at 3:18 p.m. following a brief forced outage.
At 1:48 p.m. on Sunday, August 28, Indiana Michigan Power’s Cook Nuclear Plant Unit 1 was automatically shut down due to a trip of the unit’s #3 reactor coolant pump motor. Plant Operators followed proper protocols to safely remove the reactor from service. The unit trip was non-complicated, and electric service to customers was not impacted.
The cause of the reactor coolant motor pump trip was determined to be a fault in a power cable connector. Operators safely restored the unit to service once the connector repair was completed. Each of Cook’s two reactors has four reactor coolant pumps. These pumps provide forced primary coolant flow to remove and transfer heat generated in the reactor core to the steam generators, which create steam to power the turbine generator.
