Analysis of the Impact of Cross-sectional Data Discrepancies on the Effectiveness of Radiation Shielding Design Using Monte Carlo Codes
Date
2019
Authors
Kebwaro, Jeremiah Monari
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Physics
Abstract
The effect of cross-sectional data discrepancies on the effectiveness of radiation shielding design has
been investigated in this paper. The MCNP code with cross-sections from ENDF/B-V and ENDF/B-VII has been
used to determine the gamma ray dose equivalent, H*(10), behind a lead glass shield enclosing a slow neutron
source. It is observed that the radiative capture gamma ray dose behind the shield is higher when ENDF/B-V
cross-sections are used compared to that produced by ENDF/B-VII cross-sections. The discrepancy is due to
absence of energetic primary gamma rays when ENDF/B-VII is used. The results show that shielding design using
ENDF/B-VII cross-sections could underestimate the shield by a fair margin and compromise safety. It is therefore
necessary to consider more than one release of ENDF/B when using lead glass for shielding slow neutron capture
gamma rays. The discrepancies need to be addressed in the next releases.
Description
Keywords
lead glass, shielded dose, MCNP, ENDF cross-sections, discrepancies
Citation
International Journal of Physics, 2019, Vol. 7, No. 2, 63-65