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Atmosphere 2018, 9(3), 111; https://doi.org/10.3390/atmos9030111

Validation Study for an Atmospheric Dispersion Model, Using Effective Source Heights Determined from Wind Tunnel Experiments in Nuclear Safety Analysis

1
Nikkenn Sekkei Ltd., Tokyo 102-8117, Japan
2
Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
3
Faculty of Engineering & Physical Sciences, University of Surrey, Surrey GU2 7XH, UK
*
Author to whom correspondence should be addressed.
Received: 14 February 2018 / Revised: 12 March 2018 / Accepted: 14 March 2018 / Published: 18 March 2018
(This article belongs to the Section Air Quality)
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Abstract

For more than fifty years, atmospheric dispersion predictions based on the joint use of a Gaussian plume model and wind tunnel experiments have been applied in both Japan and the U.K. for the evaluation of public radiation exposure in nuclear safety analysis. The effective source height used in the Gaussian model is determined from ground-level concentration data obtained by a wind tunnel experiment using a scaled terrain and site model. In the present paper, the concentrations calculated by this method are compared with data observed over complex terrain in the field, under a number of meteorological conditions. Good agreement was confirmed in near-neutral and unstable stabilities. However, it was found to be necessary to reduce the effective source height by 50% in order to achieve a conservative estimation of the field observations in a stable atmosphere. View Full-Text
Keywords: Atmospheric Dispersion Modelling; wind tunnel experiment; nuclear safety analysis Atmospheric Dispersion Modelling; wind tunnel experiment; nuclear safety analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Oura, M.; Ohba, R.; Robins, A.; Kato, S. Validation Study for an Atmospheric Dispersion Model, Using Effective Source Heights Determined from Wind Tunnel Experiments in Nuclear Safety Analysis. Atmosphere 2018, 9, 111.

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