Nuclear Data Working Group Overview

WANDA 2025 Planning Todd Bredeweg (LANL) chair, NDWG Jo Ressler (LLNL) vice-chair, NDWG Cathy Romano (Aerospace Corp) past-chair, NDWG CSEWG, Nov 15-17, 2024 8/19/2025 8/19/2025 1 1 Managed by Triad National Security, LLC, for the U.S. Department of Energy s NNSA.

The Nuclear Data Working group (NDWG) Mission Statement The goal of the Nuclear Data Working Group (NDWG) is to facilitate communication, collaboration, coordination, and prioritization of nuclear data efforts across multiple program offices, the national laboratories, universities, and industry. Established 2015. Current leadership: Todd Bredeweg (chair) Jo Ressler (vice-chair) NDWG website: https://www.nndc.bnl.gov/ndwg/ 8/19/2025 2

Nuclear Data Interagency Working Group (NDIAWG) Led by: Tim Hallman, DOE OS, Associate Director for Nuclear Physics Keith Jankowski, DOE OS-NP, Program Manager, Nuclear Data Composed of federal program managers from across the US government. Funds nuclear data efforts through an annual collaborative NDIWG Funding Opportunity Announcement (FOA). Meets quarterly for information exchange, identification of mutual nuclear data needs and coordination of nuclear data efforts. Most recent invite list included 60 federal program managers across a variety of federal agencies covering basic science, energy, national security, defense, space applications, and isotope production. Most recent outreach was to the fusion energy science community. 8/19/2025 3

NDIAWG FOA 1/24 WANDA 2024 2/24 NDWG/NDIAWG Timeline NDIAWG FOA Released NP, NE, IP, DNN R&D, DNDO (4/17) Workshop on Nuclear Data for Reactor Antineutrino Measurements (WoNDRAM) (06/21) NDIAWG FOA Released NP, NE, IP, DNN R&D (3/19) Nuclear Data Working Group Formed (11/15) RNDWA (10/22) USNDP USNDP Review Review (7/14) NDIAWG FOA Released NP, IP, DNN R&D (12/20) Uncertainty Quantification for Nuclear Data Workshop (10/22) NDIAWG FOA Released NP, IP, DNN R&D (3/23) NDIAWG FOA Released NP, ASCR, NE, DNN R&D, DP (3/18) Nuclear Data Interagency Working Group (PMs) (6,/16) 2022 2022 2023 2023 2021 2021 2020 2020 2019 2019 2018 2018 We ve run out of room 2016 2016 2017 2017 2014 2014 2015 2015 WANDA 2022 (02/22) WANDA 2020 (03/20) DNN R&D Nuclear Data Roadmapping Workshop (NDREW) (01/18) Nuclear Data Needs and Capabilities for Applications (NDNCA) Workshop (05/15) WANDA 2023 (03/23) WANDA 2021 (01/21) WANDA 2019 (01/19) Nuclear Data Exchange Meeting (04/16) NSAC-ND report on nuclear data (03/22) 8/19/2025 4

NDWG Roster as of September 2024 8/19/2025 5

Organizations Represented at NDWG Workshops Federal Agencies DOE Office of Science, Office of Nuclear Physics Office of Science, Fusion Energy Sciences Office of Science, Office of High Energy Physics Office of Science, Adv. Scientific Computing Research Office of Science, Isotope Program Office of Nuclear Energy ARPA-E NNSA Defense Programs, NA-11 Defense Nuclear Nonproliferation, NA-20 Naval Reactors, NA-30 Infrastructure & Environment, NA-50 Defense Nuclear Security, NA-80 DOD Defense Threat Reduction Agency MDA - Missle Defense Agency AFTAC - Air Force Technical Applications Center Other NRC - Nuclear Regulatory Commission NASA - National Aeronautics and Space Administration NIH - National Institute of Health, National Cancer Inst. DHS - Countering Weapons of Mass Destruction National Laboratories Argonne National Laboratory Brookhaven National Laboratory Idaho National Laboratory Jefferson Laboratory Lawrence Berkeley National Laboratory Lawrence Livermore National Laboratory Los Alamos National Laboratory National Institute of Standards and Technology National Superconducting Cyclotron Laboratory Naval Nuclear Laboratory Oak Ridge National Laboratory Pacific Northwest National Laboratory Sandia National Laboratories Savannah River National Laboratory SLAC National Accelerator Laboratory, Stanford University JPL - Jet Propulsion Laboratory Johns Hopkins Applied Physics Laboratory Thomas Jefferson National Accelerator Facility International Agencies European Commission, Joint Research Centre International Atomic Energy Agency Japan Atomic Energy Agency National Institute for Nuclear Physics (INFN) UK Ministry of Defence European Space Agency CERN Institute of Astronomy and Space Physics (IAFE) Universities Air Force Institute of Technology Boston University Central Michigan University Colorado School of Mines George Washington University Illinois Institute of Technology Johns Hopkins University Michigan State University North Carolina State University Ohio University Oregon State University Rensselaer Polytechnic Institute Texas A&M University Triangle Universities Nuclear Laboratory United States Naval Academy Univerisity of Tennessee Univeristy of Wisconsin University of California, Berkeley University of Massachusetts University of Michigan University of Notre Dame University of Tennessee, Knoxville University of Washington Universities (continued) University of California, Davis Missouri State University Carnegie Mellon University Univeristy of Nevada, Las Vegas Vanderbilt University East Carolina University Kansas State University Western Norway Univ. of Applied Sciences North Carolina Central University Duke University Technical University of Darmstadt Lancaster University Massachusetts Institute of Technology Industry ARA Schlumberger Studsvik, Scandpower Westinghouse X-energy The Aerospace Corporation Mayo Clinic KBR Wyle/ SSAI 8/19/2025 6

Wanda Topics that have Been Funded NDNCA (2015) Cross-cutting recommendations WANDA2019 Topics WANDA2022 Topics Dosimetry Standards Fission Decay Data and g-Branching Ratios Neutron Transport Covariance Reduction Expanded Integral Validation Antineutrinos from Reactors NDEM (2016) Cross-cutting recommendataions Nuclear Data for Isotope Production x Safeguards x Materials Damage Nuclear Data for Nuclear Energy (n,x) Reactions x Atomic Data, NRF Data x Reactions on Unstable Nuclei x High Energy Ion Interactions and Secondary Particles Neutrons as Secondary Particles and Interactions x Photon Reactions and Transport x Stopping Powers, Energy Depostion and Dose Nuclear Data Adjustments and Impact on Applications x WANDA2020 Topics WANDA2023 Topics Improving the Pipeline infrastructure Improved Covariance Data Inelastic Scattering on actinides Capture gamma spectra Improved Fission yields Target Production to Support Nuclear Data Experiments NDREW (2018) Topics Uncertainty, Sensitivity, and Covariance Neutron Capture and Associated Spectra Fission I, Independent and Cumulative Yields Gamma-Induced Reactions Inelastic Neutron Scattering and Associated Spectra Fission II, Prompt Gammas and Neutrons ( ,n) Reactions Targets, Facilities and Detector Systems Fission III, Decay Data Development of Benchmark Exercises Data Processing & Transport Code Needs Actinide Cross Sections x Covariance/Uncertainty/Sensitivity/Validation Nuclear Data for Isotope Production and Targetry Needs x Machine Learning/AI x Detector Models, Atomic Data and Stopping Powers x Scattering, Transport and Shielding x Neutron induced gammas and gamma decay WANDA2021 Topics Advanced Computing for Nuclear Data x Predictive Codes for Isotope Production x Expanded Benchmarks and Validation for Nuclear Data x Nuclear Data for Space Applications x Nuclear Data for Advanced Reactors and Security x The Human Pipeline for Nuclear Data x WoNDRAM Topics x Reactor Antineutrino Source Term x Antinneutrino Spectrum Calculations Detector Response Fission Yields/Theory, Evaluation, Experiments, Validation x Isotope Programs Gamma-Ray Strength Functions and Level Densities Nuclear Data Processing & Preservation x x x x x x 8/19/2025 7

$50 Million NDIAWG FOA Funded Projects Since 2018 FY start FY18 FY18 FY19 FY19 FY19 FY19 FY19 FY19 FY19 FY20 FY20 FY20 FY20 FY20 FY21 FY19 FY22 FY22 FY22 FY22 FY22 FY22 FY22 Title Lead ANL ANL LANL LLNL LANL ORNL LANL LANL LBNL ORNL ORNL ANL BNL LBNL USNA BNL BNL LANL LANL ORNL Duke Univ LANL LANL PI Novel Approach for Improving Antineutrino Spectra Predictions for Nonproliferation Applications Improving the Nuclear Data on Fission Product Decays at CARIBU Independent Fission Product Yields from 0.5 to 20 MeV Energy Dependent Fission Product Yields Measurements of Independent Fission Product Yields Beta-strength function, reactor decay heat, and anti-neutrino properties from total absorption spectroscopy of fission fragments Integral Measurements of Independent and Cumulative Fission Product Yields Supporting Nuclear Forensics and Other Applications Evaluation of Energy Dependent Fission Product Yields Improving the double-differential 238U(n,n g) cross section using neutron-gamma coincidences Scoping Study of the Impact of (alpha,n) Reactions and Yields of Nonproliferation Applications Assessment of Nuclear Data Needs for Neutron Active Interrogation Fission product yield measurements using 252Cf spontaneous fission and neutron-induced fission on actinide targets at CARIBU Modernization and Optimization of the Evaluated Nuclear Structure Data File 238U(p,xn) and 235U(d,xn) 235-237Np Nuclear Reaction Cross Sections Relevant to the Production of 236gNp Neutron Scattering Cross Sections: (n,n'), (n,n'g), and (n,g) Measurements State-of-the-art Gamma-ray Spectroscopy to Enhance the ENSDF Gamma Rays Induced by Neutrons White-source neutron-gamma coincidence measurements of gamma production cross sections at LANSCE Evaluation of Gamma-ray Production -energy spectral shapes in fission products affecting reactor decay heat and anti-neutrino flux Two and Three-body Photodisintegration of the Triton at Energies Below 30 MeV Designing Nuclear-data Measurements that Resolve Discrepancies in Existing Data Modern Structure-based Nuclear Data Evaluations for Basic Science, Nuclear Safety & Security Kondev, Filip Savard, Guy Winkelbauer, Jack Tonchev, Anton Duke, Dana Rykaczewski, Krzysztof Bredeweg, Todd Kawano, Toshihiko Bernstein, Lee Romano, Catherine McConchie, Seth Savard, Guy McCutchan, Elizabeth Bernstein, Lee Vanhoy, Jeff McCutchan, Elizabeth Brown, Dave Kelly, Keegan Kawano, Toshihiko Charlie Rasco Calvin Howell Denise Neudecker Mark Paris 8/19/2025 8

WANDA 2025 Where: Hilton Arlington National Landing, Crystal City, VA Near Ronald Reagan Washington National Airport (DCA) When: February 10 13, 2024 (Mon-Thu) Program Chairs Jesse Brown (ORNL) Ellen O Brien (LANL) 8/19/2025 8/19/2025 9 9

The Future WANDA 2026 Stay Tuned 8/19/2025 8/19/2025 10 10