Unit 2 of the Indiana Michgan Power Cook Nuclear Plant is back online after a 50-hour outage. It was safely brought back to service at 3:35 a.m. Wednesday after tripping automatically due to lowering water level in one of its four steam generators. That issue has been fixed. It had gone off at 12:26 a.m. Monday. Unit 1 is still offline for its refueling outage.