PPL Susquehanna has announced that the unit 1 of its Susquehanna nuclear power plant in Pennsylvania, US has resumed operations after the company planned an outage to investigate and repair water leak inside the containment structure surrounding the reactor.

The nuclear power plant located in Luzerne County, about seven miles north of Berwick, has started producing electricity after the company repaired and welded the leak.

PPL Susquehanna senior vice president and chief nuclear officer Timothy S Rausch said the company made the proactive decision to shut down the unit and address the small leak, consistent with its safety-first approach to operating the plant.

"We repaired a weld where the leak was found and ensured similar equipment was inspected and ready to support continued safe and reliable operation," Rausch said.

The nuclear plant has two units each with an electricity generating capacity of about 1,250MW.

PPL Susquehanna and Allegheny Electric Cooperative co-own the Susquehanna nuclear plant and is operated by PPL Susquehanna.