Comprehensive stainless steel neutron transport libraries validation

Schulc, Martin; Košťál, Michal; Czakoj, Tomáš; Šimon, Jan; Novák, Evžen; Matěj, Zdeněk

doi:10.1016/j.anucene.2022.109433

Cited by 3 publications

(1 citation statement)

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“…From the previous experience we needed to validate both the new iron and chromium evaluations, being the nickel evaluation taken from the ENDF/B-VIII.0 library. The most recent experiment using a well-validated neutron spectrometer was performed at Řež, CZ [33]. The experiment measured the neutron leakage spectrum from a 50x50x50cm 3 stainless steel cube with a 252 Cf(sf) source located inside.…”

Section: Performance In Shielding Benchmarksmentioning

confidence: 99%

Progress in the Evaluation and Validation of n+^56,57Fe Cross Sections

et al. 2023

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There has been a continued effort since 2019 within the IAEA INDEN collaboration to improve the evaluation of neutron induced reactions on iron isotopes. The reason for the 30% underestimation of the neutron leakage spectrum from a thick iron sphere was found primarily to be due to the overestimation of the inelastic cross sections in the 56Fe evaluated data file produced within the CIELO project of the OECD/NEA Data Bank. The over-estimation of the neutron flux between the resonances near 300 keV was traced to neglecting the fluctuating nature of the total cross section of 57Fe in the fast neutron energy range, since the evaluated resolved resonance range of 57Fe extended only up to 190 keV. The added 1/v background in the "iron window" below 28 keV is in excellent agreement with the independently evaluated one in the JENDL-5.0 library that included the direct capture component in the evaluation. Performance of the updated 56,57Fe evaluations was tested on a set of criticality benchmarks from the ICSBEP Handbook, including the dependence on reflector thickness and on new deep penetration shielding benchmark using a 252Cf(sf) neutron source undertaken at Rez, Czech Republic. Neutron leakage for 43 MeV incident neutrons was also validated.

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Section: Performance In Shielding Benchmarksmentioning

confidence: 99%