Measurements and Monte-Carlo simulations of the particle self-shielding effect of B4C grains in neutron shielding concrete
| Autor: | Douglas D. DiJulio, Phillip M. Bentley, Isabel Llamas-Jansa, S. Kazi, Carsten P. Cooper-Jensen |
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| Rok vydání: | 2018 |
| Předmět: |
Physics - Instrumentation and Detectors
Radiation Materials science Physics::Instrumentation and Detectors 010308 nuclear & particles physics 020209 energy Monte Carlo method FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) 02 engineering and technology Neutron radiation 01 natural sciences 7. Clean energy Self shielding Computational physics Nuclear physics Beamline 0103 physical sciences Electromagnetic shielding 0202 electrical engineering electronic engineering information engineering Particle Neutron detection Neutron Nuclear Experiment (nucl-ex) Nuclear Experiment |
| Zdroj: | Radiation Physics and Chemistry |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2018.01.023 |
| Popis: | A combined measurement and Monte-Carlo simulation study was carried out in order to characterize the particle self-shielding effect of B4C grains in neutron shielding concrete. Several batches of a specialized neutron shielding concrete, with varying B4C grain sizes, were exposed to a 2 {\AA} neutron beam at the R2D2 test beamline at the Institute for Energy Technology located in Kjeller, Norway. The direct and scattered neutrons were detected with a neutron detector placed behind the concrete blocks and the results were compared to Geant4 simulations. The particle self-shielding effect was included in the Geant4 simulations by calculating effective neutron cross-sections during the Monte-Carlo simulation process. It is shown that this method well reproduces the measured results. Our results show that shielding calculations for low-energy neutrons using such materials would lead to an underestimate of the shielding required for a certain design scenario if the particle self-shielding effect is not included in the calculations. Comment: This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Databáze: | OpenAIRE |
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