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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.
Technical Session|Methods
Monday, April 22, 2024|1:30–3:15PM PDT|Continental Ballroom 2
Session Chair:
Jaako Leppanen (VTT Technical Research Centre of Finland)
Alternate Chair:
Paolo Vinai (Chalmers Univ. Technology)
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Hobbes: Multigroup Cross Section Generation for Mixed-Architecture Computing Environments
1:30–1:50PM PDT
S.J. Douglass (Naval Nuclear Laboratory)
Paper
Understanding the Macroscopic Cross Section Treatment in Hybrid Continuous Energy and Multigroup Depletion Using the Shift Monte Carlo Code
1:50–2:10PM PDT
Vidor Lujan (Georgia Tech), Bailey Painter (Georgia Tech), Inhyung Kim (Univ. California, Berkeley), Massimiliano Fratoni (Univ. California, Berkeley), Thomas M. Evans (ORNL), Tara M. Pandya (ORNL), Dan Kotlyar (Georgia Tech)
Derivation of the History Variable Calculation for Macro-Depletion in Nodal Simulators
2:10–2:30PM PDT
Thomas Folk (Univ. Michigan), Brendan Kochunas (Univ. Michigan)
Initial Assessment of Online Cross Section Generation Capability of Griffin for Gas-Cooled Pebble-Bed Reactor
2:30–2:50PM PDT
Hansol Park (ANL), Yeon Sang Jung (ANL), Changho Lee (ANL), Yaqi Wang (INL), Javier Ortensi (INL)
Application of Expanded Transfer Functions for Predicting Coarse Mesh, One-Group Macroscopic Cross Sections in a 3D Realistic PWR Core
2:50–3:10PM PDT
Bailey Painter (Georgia Tech), Dan Kotlyar (Georgia Tech)
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