Nuclear Science User Facilities 38 NUCLEAR FUELS and MATERIAL ONLINE LIBRARY The Nuclear Science User Facili- ties (NSUF) Nuclear Fuels and Materials Library went online in 2016 to establish another pathway for research.The library is a collection of specialized information, nuclear fuel and material specimens from past and ongoing irradiation test campaigns, real-world components retrieved from decommissioned power reactors, and donations from other sources. It includes irradiated and unirradiated samples in a wide range of material types, from steel samples irradiated in fast reactors to ceramic materials irradiated in the AdvancedTest Reactor. The Nuclear Fuels and Materials Library is owned by the U.S. Depart- ment of Energy’s Office of Nuclear Energy (DOE-NE) and curated by the NSUF. Many of the samples are from previous U.S. Department of Energy (DOE) funded material and fuel development programs. Researchers can propose to analyze these samples in a post-irradiation examination (PIE) only experiment. Samples from the library may be used for proposals for open calls and rapid turnaround experiments. As the NSUF program continues to grow, so will easily accessible NSUF research tools like the Nuclear Fuels and Materials Library. Expanding the Library’s inventory means reaching back to ensure that information and materials are properly archived.The NSUF has prioritized: • documenting “tribal knowledge” (long stored legacy material infor- mation, locations,pedigrees, etc.), • making materials inventories accessible to researchers, and • including archived materials to validate past and current analyses. The library has grown to approxi- mately 6,000 specimens, up from approximately 3,500 at its inception. Continued collaboration within the nuclear community will expand the inventory by adding materials in line with DOE-NE’s current mission and future NE research needs. DOE-NE periodically issues Requests for Infor- mation to supplement the library’s offering by asking researchers to provide information on: • existing nuclear energy research materials and specimens that can, potentially, be added to the Nuclear Fuels and Materials Library, and • future needs for nuclear energy related material to support ongoing nuclear energy challenges as well as future research advancements in nuclear energy. The library can be accessed via the NSUF’s website at https://nsuf.inl. gov or directly via the Nuclear Energy Infrastructure Database at https://nsuf- Kelly Cunningham Nuclear Fuels and Materials Library Coordinator