Constellation Energy has cleared an important regulatory milestone in its plan to restart a dormant nuclear unit at Three Mile Island. The Federal Energy Regulatory Commission granted the company a waiver to transfer capacity interconnection rights, a decision that streamlines the path toward bringing the facility back online, according to reporting from Utility Dive.
The waiver is significant because it allows Constellation to consolidate and optimize its grid connection capacity for the restarted unit. This flexibility means the reactor could potentially deliver its full generating capacity when operations resume, rather than facing limitations on power output tied to the original interconnection agreement. The company has indicated it could achieve restart before the end of 2027.
For the broader Mid-Atlantic power market, including the Carolinas region, the restart of additional nuclear capacity addresses growing electricity demand driven by data centers, manufacturing operations, and electrification efforts. Nuclear energy provides reliable, carbon-free baseload power that helps utilities meet both supply needs and emissions reduction goals increasingly important to corporate customers and state policy.
The FERC approval represents one of several regulatory steps remaining before full operations resume. Constellation continues working with state and federal authorities on remaining permits and operational clearances. As the energy sector navigates the balance between retiring coal capacity and meeting future demand, projects like this Three Mile Island restart play an important role in the region's power infrastructure planning.