The Nuclear Regulatory Commission has rejected a petition by Three Mile Island Alert (TMIA) challenging Exelon’s request to revise its site emergency plan for the closed Three Mile Island nuclear power plant in Pennsylvania. Exelon submitted a request to the NRC to amend its TMI-1 license to reflect the reduced risks of the defueled reactor, which was permanently shut down in September 2019.

In an order issued on October 8, the NRC commissioners upheld a decision by an NRC Atomic Safety and Licensing Board denying TMIA’s petition to intervene and request a hearing in the license amendment request. That decision, issued on January 23, 2020, found that the antinuclear group had not established standing in the case and that its contentions were inadmissible.