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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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NEA report calls for more accurate data on SNF heat decay
The OECD Nuclear Energy Agency has issued a report calling for more-detailed information on tracking the decay heat of spent nuclear fuel from light water reactors. According to the NEA, the report highlights the increasing importance of accurate decay heat estimations due to evolving fuel characteristics, including higher initial fuel enrichment, increased burn-up rates, and extended reactor cycle lengths.
The report, Summary of the NEA Assessment on Spent Nuclear Fuel Decay Heat for Light Water Reactors, summarizes the findings of a subgroup of the NEA’s Working Party on Nuclear Criticality Safety (WPNCS), which ran from January 2022 to January 2024.
Nuclear Criticality Safety Division Topical Meeting (NCSD 2022)
Technical Session
Wednesday, June 15, 2022|1:00–2:45PM PDT|Laguna A
Session Chairs:
Mark Neeley (PNNL)
David P. Heinrichs (LLNL)
Session Organizer:
Theresa E. Cutler
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Applicability of ORCEF UF4/CF2 Experiments to Validation of 30-Inch UF6 Cylinders
W.J. Marshall (ORNL), T.M. Greene (ORNL)
Paper
Plutonium Mass Equivalencies for Fissile Isotopes of Am, Cf, and Cm
Analysis of SCALE Criticality and Sensitivity Calculations for Reflected HEU Cylinders
A.M. Shaw (ORNL), W.J. Marshall (ORNL)
Correlation Calculations for the Russian Pu Metal Fast Experiments
Michael Branco-Katcher (LLNL), Daniel Siefman (LLNL), Catherine Percher (LLNL), David Heinrichs (LLNL), Todd S. Palmer (Oregon State)
Sensitivity Coefficients Calculated for the Prompt Neutron Decay Constant at or near Delayed Critical
N. Kleedtke (LANL), J. Hutchinson (LANL), M. Hua (LANL), M. Rising (LANL)
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