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Nuclear Data and Uncertainties

The need to for improved nuclear data and their associated uncertainties continue to emerge as a key factor for advanced nuclear energy applications. Many types of differential nuclear data, including neutron cross-section data, fission product yields, radioactive decay data, and associated uncertainties are distributed world-wide through the Evaluated Nuclear Data Files (ENDF) hosted at the National Nuclear Data Center (NNDC) at Brookhaven National Laboratory. These data are applied in countless applications in nearly all nuclear systems modeling and simulation tools in areas such as current and advanced reactor design, operation, and licensing; spent fuel analysis; non-proliferation; safeguards; radiation protection; etc. The NEAMS IPL is investigating nuclear data needs for advanced reactors and advanced fuels, especially for priority needs established by the Nuclear Energy Institute (NEI) Advanced Reactors Technical Working Groups, the Cross Section Evaluation Working Group (CSWEG) as well as the Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency’s (NEA) Working Party on International Nuclear Data Evaluation Co-operation (WPEC).

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Uncertainty in 238U inelastic scattering cross section, a leading source of uncertainty in fast reactor systems.