The extended long-term storage of used nuclear fuel in the United States will require increased reliance on dry cask storage systems. As part of the U.S. Department of Energy's Used Fuel Disposition Campaign Research and Development Program, Argonne National Laboratory prepared Revision 1 of the report Managing Aging Effects on Dry Cask Storage Systems for Extended Long-Term Storage and Transportation of Used Fuel. This report examines issues related to managing the effects of aging on the structures, systems, and components that are important to safety in dry cask storage systems and independent spent fuel storage installations for the extended long-term storage of used fuel, by following an approach similar to that of the U.S. Nuclear Regulatory Agency's NUREG-1801 report, Generic Aging Lessons Learned, for the aging management and license renewal of nuclear power plants. This paper briefly summarizes the license renewal process for dry cask storage systems and ISFSIs and describes a set of time-limited aging analyses and aging management programs that have been developed in a holistic manner emphasizing prevention, mitigation, inspection and monitoring to enable license renewal. The application of these analyses and programs to the aging management review process is then illustrated for selected components in commercial dry cask storage systems.
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