Title: Dynamic dose assessment by Large Eddy Simulation of the near-range atmospheric dispersion
Authors: Vervecken, Lieven ×
Camps, Johan
Meyers, Johan #
Issue Date: Jan-2015
Publisher: IOP
Series Title: Journal of Radiological Protection vol:35 pages:165-178
Abstract: In order to improve the simulation of the near-range atmospheric dispersion of radionuclides, computational fluid dynamics (CFD) is becoming increasingly popular. In the current study, Large-Eddy Simulation (LES) is used to examine the time-evolution of the turbulent dispersion of radioactive gases in the atmospheric boundary layer, and it is coupled to a gamma dose rate model that is based on the point-kernel method with buildup factors. In this way, the variability of radiological dose rate from cloud shine due to instantaneous turbulent mixing processes can be evaluated. The steady release in an open field of Argon-41 and Xenon-133 for 4 different release heights is studied, thus covering radionuclides that decay with a high-energy gamma and a low-energy gamma, respectively. Based on these simulations, the variability of dose rates at ground level for different averaging times in the dose measurements is
analyzed. It is observed that turbulent variability in the wind field can lead to dose estimates that are underestimated by up to a factor of four when conventional long-term measurements are used to estimate the dose from short-term exposures.
ISSN: 0952-4746
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Applied Mechanics and Energy Conversion Section
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
jrp-article_preprint.pdf Accepted 337KbAdobe PDFView/Open
0952-4746_35_1_165.pdf Published 840KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science