Operators began the process to safely down-power the Unit 1 reactor at Talen Energy's Susquehanna nuclear plant in Luzerne County, Pa. late Sunday (6/5) and disconnected from the regional transmission grid early Monday (6/6). The plan to shut down the unit was developed to address a small water leak inside the Unit 1 containment structure that is designed to maintain safety for this kind of issue.

"Our nuclear professionals have spent the past week developing various contingencies to ensure the safest and most efficient approach to repairing the leak," said Jon Franke, site vice president. "Although this is not causing a challenge at this time, it is our priority to find and fix this prior to full summer operations."

Since the unit disconnected from the grid in the past few hours, it is premature to provide a specific timeline for returning Unit 1 to service. "As has always been the case, Team Susquehanna's primary focus is safety, so that we can then deliver reliable, zero-carbon energy to our customers," said Franke.

Susquehanna Unit 2 continues to operate safely at full rated power.

The Susquehanna plant, located about seven miles north of Berwick, is jointly owned by Susquehanna Nuclear, LLC, and Allegheny Electric Cooperative Inc., and is operated by Susquehanna Nuclear. For information, visitwww.susquehannanuclear.com.

Susquehanna Nuclear LLC is one of Talen Energy's generating affiliates. Talen Energy (NYSE: TLN) is one of the largest competitive energy and power generation companies in the United States. Our diverse generating fleet operates in well-developed, structured wholesale power markets. To learn more about us, visitwww.talenenergy.com.