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Measurements and Monte-Carlo simulations of the particle self-shielding effect of B4C grains in neutron shielding concrete

DiJulio, D. D. LU ; Cooper-Jensen, C. P. LU ; Llamas-Jansa, I.; Kazi, S. and Bentley, P. M. LU (2018) In Radiation Physics and Chemistry 147. p.40-44
Abstract

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 Å 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... (More)

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 Å 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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Geant4, Neutron shielding concrete, Particle Self-Shielding effect
in
Radiation Physics and Chemistry
volume
147
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:85041535141
ISSN
0969-806X
DOI
10.1016/j.radphyschem.2018.01.023
language
English
LU publication?
yes
id
92c80a1c-1656-4559-8631-756684e08449
date added to LUP
2018-02-20 08:25:04
date last changed
2018-05-29 11:35:10
@article{92c80a1c-1656-4559-8631-756684e08449,
  abstract     = {<p>A combined measurement and Monte-Carlo simulation study was carried out in order to characterize the particle self-shielding effect of B<sub>4</sub>C grains in neutron shielding concrete. Several batches of a specialized neutron shielding concrete, with varying B<sub>4</sub>C grain sizes, were exposed to a 2 Å 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.</p>},
  author       = {DiJulio, D. D. and Cooper-Jensen, C. P. and Llamas-Jansa, I. and Kazi, S. and Bentley, P. M.},
  issn         = {0969-806X},
  keyword      = {Geant4,Neutron shielding concrete,Particle Self-Shielding effect},
  language     = {eng},
  month        = {06},
  pages        = {40--44},
  publisher    = {Elsevier},
  series       = {Radiation Physics and Chemistry},
  title        = {Measurements and Monte-Carlo simulations of the particle self-shielding effect of B<sub>4</sub>C grains in neutron shielding concrete},
  url          = {http://dx.doi.org/10.1016/j.radphyschem.2018.01.023},
  volume       = {147},
  year         = {2018},
}