As of June 4, 2026, federal regulators gave a significant boost to Constellation Energy’s effort to restart the former Three Mile Island Unit 1 reactor, now renamed the Crane Clean Energy Center. [1] The Federal Energy Regulatory Commission (FERC) approved a waiver allowing Constellation to transfer grid interconnection rights from its retiring Eddystone fossil-fuel plant to the nuclear facility. Without the waiver, delayed transmission upgrades in the PJM region could have prevented the plant from fully delivering power until 2030–2031, jeopardizing Constellation’s target to restart the reactor in the second half of 2027. FERC concluded that the waiver addressed a concrete reliability problem and met the agency’s standards for granting relief. Under the decision, Constellation will be able to transfer 760 MW of Capacity Interconnection Rights (CIRs) from the Eddystone plant to Crane, increasing the amount of electricity the nuclear unit can deliver to the grid. Constellation has a 20-year deal to sell all the energy, capacity, and clean energy attributes from the nuclear unit to Microsoft for data centers across PJM’s Mid-Atlantic and Midwest footprint.
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