Nuclear Regulatory Commission Finds Restart of Three Mile Island Reactor One Will Not Have Significant Impact

Harrisburg Lancaster Lebanon York, PA, October 1, 2026 — The Nuclear Regulatory Commission (NRC) has concluded that the planned restart of reactor one at the former Three Mile Island nuclear power station, located in Middletown, Pennsylvania, is not anticipated to result in a significant impact.

The determination was made by the regulatory body responsible for overseeing nuclear power in the United States. The specific details of the restart plan, including the timeline or the entity proposing the restart, were not provided in the summary information. Similarly, the nature of the ‘significant impact’ – whether environmental, safety-related, or otherwise – was not specified.

Three Mile Island is historically known for a partial meltdown in its Unit 2 reactor in 1979, which led to significant public concern and regulatory changes within the nuclear industry. The current announcement pertains to reactor one at the same site.

The NRC’s assessment indicates that, based on their review, the operational commencement of reactor one will not lead to consequences deemed substantial. This finding is a key step in any process involving the restart or operation of a nuclear facility, as regulatory approval is contingent on demonstrating minimal adverse effects.

Further information regarding the exact scope of the restart, the operational parameters, and the specific criteria used by the NRC to define ‘significant impact’ was not detailed in the available summary. The contractor or entity responsible for the restart was also not identified.

Story summarized from the original created by Kaylee Lindenmuth,Seth Kaplan on www.abc27.com, see more information here.

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