Existing Nuclear Licence Renewals and Why the Operating Fleet Still Anchors Firm Supply

The ADVANCE Act, signed in July after passing the Senate 88 to 2 and the House 393 to 13, was written mostly with new reactors in mind. The bigger near-term question for U.S. firm supply is how long the existing fleet keeps running, and that runs through a less publicized NRC process: subsequent license renewal, which extends a reactor's operating license from 60 to 80 years. By mid-November 2024 the NRC had completed four subsequent renewals, covering eight units at four stations: Turkey Point 3 and 4, Peach Bottom 2 and 3, Surry 1 and 2, and North Anna 1 and 2.

A reactor that runs to 80 years delivers firm, low-carbon output on a schedule of refueling outages. We think the ADVANCE Act's most valuable provisions for the next decade are the ones aimed at NRC efficiency and staffing, because the existing fleet's renewals depend on them. Co-location of data centers at existing nuclear sites raises cost-allocation questions that FERC and PJM have not resolved.