NRC Offers Adjudicatory Hearing on Constellation’s Three Mile Island‑1 Restart Amendments

The U.S. Nuclear Regulatory Commission has posted a Federal Register notice and opened an adjudicatory hearing opportunity on three license amendment requests filed by Constellation Energy Generation, LLC to restart Three Mile Island Unit 1 (TMI-1), and the notice makes clear the public may comment, request a hearing, or petition for leave to intervene. The Federal Register metadata attached to the notice shows a VerDate header of Feb 12, 2026 and file name 13FEN1 with a printed page artifact of 60137, and the public-inspection version lists Carrie Safford as Secretary of the Commission.

Attachment 1 in the public-inspection Federal Register sets a General Target Schedule that makes Day 0 the publication of the Federal Register notice and Day 10 the deadline for submitting requests for access to Sensitive Unclassified Non-Safeguards Information (SUNSI). The SUNSI access requests must include a description of the licensing action with a citation to the Federal Register notice, the name and address of the potential party and a particularized interest, the identity of the requester and basis for need, and an explanation why publicly available versions of the information are insufficient.

Constellation’s amendment requests come against the plant’s recent history: TMI-1 was shut down in 2019 for economic reasons, and Constellation announced a 20-year power purchase agreement with Microsoft in 2024 tied to a restart plan, context cited in American Nuclear Society reporting. ANS also reports the NRC has determined the proposed amendments involve no significant hazards consideration; the public-inspection Federal Register warns that if the Commission issues a final no significant hazards consideration determination, any hearing will take place after issuance.

Filing and participation in the adjudicatory proceeding must comply with NRC rules in 10 CFR Part 2, including E‑Filing under 10 CFR 2.302. Participants are instructed to obtain an NRC digital identification certificate at least 10 days before a filing deadline by contacting the Office of the Secretary at Hearing.Docket@nrc.gov or 301-415-1677, after which the Secretary will establish an electronic docket. Guidance for electronic submissions is available in ADAMS accession ML13031A056 and the public materials referenced in the notice; filings must be submitted in PDF and are timely if received by 11:59 p.m. ET on the due date.

There are conflicting publication-date signals in source materials: Govinfo metadata suggests mid-February processing while ANS cites a February 24 Federal Register publication and lists a comment deadline of March 26 and a hearing/intervention filing deadline of April 27. Calculations for Day 10 SUNSI deadlines and intervention timeliness depend on the official Federal Register publication date. ADAMS accession ML20340A053 and the NRC’s adjudicatory participation webpages are cited in the notice for parties seeking to pursue petitions or non-party participation under 10 CFR 2.315(c).

Written comments may be mailed to Secretary, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, Attention: Rulemaking and Adjudications Staff, and documents placed in the adjudicatory docket will appear in the NRC’s electronic hearing docket unless excluded by order of a presiding officer. The next concrete milestones for the TMI-1 restart amendments are confirmation of the Federal Register citation and the consequent calculation of Day 10 SUNSI deadlines, public comment closing, and any intervention filing dates tied to that publication.