The Nine Mile Two nuclear plant shut down Thursday for the second time in a week.
Nuclear Regulatory Commission spokesman Neil Sheehan said the plant was being brought back to full power slowly and had hit about 15% of full power when operators found a leak in a 1/2 inch feedwater pump line.
They manually shut down the plant without incident, he said.
The plant was shut down last Saturday because of a different leak.
Sheehan said the second shutdown counts against the limit of three unplanned shutdowns in 7,000 hours of operation. If there’s a fourth unplanned shutdown, the NRC will increase its oversight of the plant.