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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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Latest News
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|8:00–9:45AM PDT|El Capitan A
Session Chairs:
Kermit A. Bunde (DOE-ID)
Shauntay Coleman (LLNL)
Session Organizer:
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Update of the Nuclear Criticality Slide Rule: Review of the Estimation of the Number of Fissions
Matthieu Duluc (IRSN), Johann Herth (IRSN), Tristan Adatte (IRSN), David P. Heinrichs (LLNL), Soon Kim (LLNL), Doug Bowen (ORNL), Cihangir Celik (ORNL), Mathieu Dupont (ORNL)
Paper
Update of the Nuclear Criticality Slide Rule Calculations: Plutonium Systems – Delayed Fission Gamma
Johann Herth (IRSN), Matthieu Duluc (IRSN), Tristan Adatte (IRSN), Dave Heinrichs (LLNL), Soon Kim (LLNL), Doug Bowen (ORNL), Cihangir Celik (ORNL), Mathieu Dupont (ORNL)
CAAS Replacement in Enduring Facilities
Timothy Jackson (Y-12 National Security Complex), James Yugo (Y-12 National Security Complex), Jeff Goodman (Y-12 National Security Complex), Chris Haught (Y-12 National Security Complex)
Pressurized Gases as Neutron Reflectors
Trevor Stewart (LANL), Ning Zhang (LANL)
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