Abstract
Oak Ridge National Laboratory's High Flux Isotope Reactor (HFIR) is the highest-flux reactor-based neutron source in the United States. HFIR's intense neutron flux and state-of-the-art facilities result in world-class capabilities, including neutron scattering, radioisotope production, materials irradiation, and neutron activation analysis. HFIR's multimission capabilities are attributed to its versatile high-power-density core design consisting of a series of concentric regions, including a flux trap target region, an inner fuel element, an outer fuel element, a control element region, and a beryllium reflector. The pressurized, light-water-cooled research reactor operates at 85MW and is fueled by 9.4kg 235U.
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