KFK iron sphere neutron and gamma benchmark sensitivity/uncertainty analysis to n/γ nuclear data and potential use for cross section improvement

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-01-30 DOI:10.1016/j.anucene.2025.111220

I. Kodeli

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引用次数: 0

Abstract

The SUSD3D computer code has been recently updated with new features including the extension of the nuclear data sensitivity and uncertainty (S/U) analysis to gamma-ray quantities such as gamma flux and heating. Gamma relevant nuclear data (ENDF material files MF16, MF23, MF26) can be processed allowing S/U of coupled neutron/gamma problems. The code is available from the NEA data Bank as part of the new version of the XSUN-2023 computer code package which includes also the latest updates of the cross section and covariance matrix libraries based on the JEFF-3.3, ENDF/B-VIII.0 and FENDL-3.2 evaluations. The code was applied to the S/U analysis of the KFK neutron and γ-ray leakage benchmark to evaluate the sensitivities to iron neutron and gamma cross sections.

Sensitivity of neutron and gamma flux to the iron inelastic, elastic and capture cross sections was found to depend in an interesting way on iron shell thickness, even changing from positive to negative, which suggests that these type of measurements (in particular if repeated using more modern measurement techniques) can be powerful for the validation of iron cross sections in the high energy ranges. The need for the evaluation of gamma-ray covariances is raised.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.