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Measurements and Monte-Carlo simulations of the particle self-shielding effect of B4C grains in neutron shielding concrete
European Spollat Source ERIC, POB 176, SE-22100 Lund, Sweden;Lund Univ, Div Nucl Phys, SE-22100 Lund, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics. European Spollat Source ERIC, POB 176, SE-22100 Lund, Sweden.
European Spollat Source ERIC, POB 176, SE-22100 Lund, Sweden;Inst Energy Technol, POB 40, N-2027 Kjeller, Norway.
Inst Energy Technol, POB 40, N-2027 Kjeller, Norway.
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2018 (English)In: Radiation Physics and Chemistry, ISSN 0969-806X, E-ISSN 1879-0895, Vol. 147, p. 40-44Article in journal (Refereed) Published
Abstract [en]

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 angstrom 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.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2018. Vol. 147, p. 40-44
Keywords [en]
Neutron shielding concrete, Particle Self-Shielding effect, Geant4
National Category
Accelerator Physics and Instrumentation
Identifiers
URN: urn:nbn:se:uu:diva-352561DOI: 10.1016/j.radphyschem.2018.01.023ISI: 000429394100007OAI: oai:DiVA.org:uu-352561DiVA, id: diva2:1237414
Funder
EU, Horizon 2020, 654000Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-08-08Bibliographically approved

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