Pre-analysis of the copper neutronics benchmark experiment for nuclear data validation

Flammini, D.; Villari, R.; Angelone, M.; Moro, F.

doi:10.1016/j.fusengdes.2015.05.062

Cited by 4 publications

(1 citation statement)

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“…The objective of the benchmark was the integral testing of the newly released JEFF-3.2 library [7] for copper cross sections. The used copper block (60 × 70 × 60 cm 3 ) was the result of a pre-analysis of the experiment devoted to optimize the Cu block dimensions as well as the positions of the detectors [8]. The relevant neutronics quantities (e.g.…”

Section: Introductionmentioning

confidence: 99%

Copper benchmark experiment for the testing of JEFF-3.2 nuclear data for fusion applications

et al. 2017

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A neutronics benchmark experiment on a pure Copper block (dimensions 60 × 70 × 70 cm 3) aimed at testing and validating the recent nuclear data libraries for fusion applications was performed in the frame of the European Fusion Program at the 14 MeV ENEA Frascati Neutron Generator (FNG). Reaction rates, neutron flux spectra and doses were measured using different experimental techniques (e.g. activation foils techniques, NE213 scintillator and thermoluminescent detectors). This paper first summarizes the analyses of the experiment carried-out using the MCNP5 Monte Carlo code and the European JEFF-3.2 library. Large discrepancies between calculation (C) and experiment (E) were found for the reaction rates both in the high and low neutron energy range. The analysis was complemented by sensitivity/uncertainty analyses (S/U) using the deterministic and Monte Carlo SUSD3D and MCSEN codes, respectively. The S/U analyses enabled to identify the cross sections and energy ranges which are mostly affecting the calculated responses. The largest discrepancy among the C/E values was observed for the thermal (capture) reactions indicating severe deficiencies in the 63,65 Cu capture and elastic cross sections at lower rather than at high energy. Deterministic and MC codes produced similar results. The 14 MeV copper experiment and its analysis thus calls for a revision of the JEFF-3.2 copper cross section and covariance data evaluation. A new analysis of the experiment was performed with the MCNP5 code using the revised JEFF-3.3-T2 library released by NEA and a new, not yet distributed, revised JEFF-3.2 Cu evaluation produced by KIT. A noticeable improvement of the C/E results was obtained with both new libraries.

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Section: Introductionmentioning

confidence: 99%