The U.S. Nuclear Regulatory Commission (NRC) is revising its generic determination regarding the environmental impacts of the continued storage of spent nuclear fuel beyond a reactor's licensed life for operation and prior to ultimate disposal. The NRC prepared a final generic environmental impact statement that provides a regulatory basis for this final rule. The Commission concludes that the generic environmental impact statement generically determines the environmental impacts of continued storage of spent nuclear fuel beyond the licensed life for operation of a reactor. The final rule also clarifies that the generic determination applies to license renewal for an independent spent fuel storage installation (ISFSI), reactor construction permits, and early site permits. The final rule clarifies how the generic determination will be used in future NRC environmental reviews, and makes changes to improve readability. Finally, the final rule makes conforming amendments to the determinations on the environmental effects of renewing the operating license of a nuclear power plant to address issues related to the onsite storage of spent nuclear fuel and offsite radiological impacts of spent nuclear fuel and high-level waste disposal.