Power from Unit 1 at Talen Energy’s Susquehanna nuclear power plant returned to the regional grid after a three-week shut down to take care of a water leak.

Operators reconnected Susquehanna Unit 1 on Monday, officials said. Workers manually shut down the Unit 1 reactor June 6 to address a water leak inside the unit’s containment structure.

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During an inspection of the area, Susquehanna staff identified and subsequently reported a second minor leak from a pipe beneath the reactor vessel to the Nuclear Regulatory Commission (NRC).

“Throughout the maintenance outage, our nuclear professionals maintained their primary focus on keeping each other and the surrounding community safe,” said Jon Franke, site vice president. “We have worked effectively with our equipment vendors and other industry experts to develop and implement the plan to complete repairs to return the unit to reliable service.”
Unit 2 at the plant remained fully operational, Talen said.

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NRC spokesman Neil Sheehan said Unit 1 had been experiencing “very minor leakage” from a tube guide at the bottom of the reactor vessel. A tube guide is where a device used to measure power levels is inserted into the vessel.

Talen completed a weld overlay to repair the leakage, and Sheehan said agency officials did not identify any concerns with the fix.

Sheehan and Talen previously said the leakage, while radioactive, had been captured inside the plant’s containment structure and processed by systems designed to handle such liquids.

The Susquehanna plant is in Salem Township, Luzerne County, PA, about 75 miles northwest of Allentown. Susquehanna Nuclear LLC and Allegheny Electric Cooperative Inc. jointly own the facility. Susquehanna Nuclear LLC is one of Allentown-based Talen Energy’s generating affiliates.

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