Communication Dans Un Congrès Année : 2026

Intercomparison of nuclear data processing

Résumé

This research presents a systematic intercomparison study examining how different nuclear data processing codes like NJOY, FUDGE and GAIA affect criticality safety calculations. Nuclear data in ENDF format must be processed into ACE files for Monte Carlo simulations, but these processing codes use different algorithms across five critical steps: resonance reconstruction, Doppler broadening, probability tables, angular distributions, and energy grid generation. The study used a two-level analysis approach: first, directly comparing cross sections from different processing codes across 33 strategically selected isotopes (12 actinides, 15 fission products, and 6 structural materials), and second, evaluating the impact on k-effective using ICSBEP benchmarks selected through the ASNR tool CALINS. Preliminary results show that while processing codes generally agree within 1%, local differences appear in resonance regions and the unresolved resonance range, stemming from algorithmic choices rather than errors. This kick-off study demonstrates the feasibility of the methodology, its importance, and establishes a foundation for a comprehensive future campaign involving international collaboration with ORNL, LLNL, LANL, and NNL to systematically quantify how processing methodology choices propagate through criticality safety studies.

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Dates et versions

hal-05455008 , version 1 (13-01-2026)

Identifiants

  • HAL Id : hal-05455008 , version 1

Citer

Vaibhav Jaiswal, Abdoul-Aziz Zakari. Intercomparison of nuclear data processing. Nuclear Data Week 2025 (6–9 January 2026) – Analytical Methods Working Group (AMWG), Brookhaven National Laboratory (BNL); NCSP (US DOE), Jan 2026, Brookhaven, United States. ⟨hal-05455008⟩
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