Federal officials requested a 20-year extension involving the storage in Idaho of reactor core debris from the partial meltdown at the Three Mile Island nuclear power plant.
The U.S. Department of Energy, in a document made public Friday, asked the Nuclear Regulatory Commission to renew a license allowing storage until 2039 at an 890-square-mile site that includes the Idaho National Laboratory.
The debris from the 1979 nuclear accident was shipped from Pennsylvania to Idaho between 1986 and 1990. Research on the material was performed to improve nuclear fuel design and reactor safety.
The material also includes intact fuel assemblies.
The license to store the...