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Open AccessArticle

Effect of Additional Structure on Effective Stack Height of Gas Dispersion in Atmosphere

by 1,2,*,†, 3,† and 4,†
1
Environmental Science Research Laboratory, Central Research Industry of Electric Power Industry, 1646 Abiko, Abiko-shi, Chiba-ken 270-1194, Japan
2
Department of Mechanical Engineering, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
3
Nuclear Risk Research Center, Central Research Industry of Electric Power Industry, 1646 Abiko, Abiko-shi, Chiba-ken 270-1194, Japan
4
Fluid Dynamics Research Department, Research & Innovation Center, Technology & Innovation Headquarters, Mitsubishi Heavy Industries, Ltd., 5-717-1 Fukahori-machi, Nagasaki 851-0392, Japan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Robert W. Talbot
Atmosphere 2016, 7(4), 50; https://doi.org/10.3390/atmos7040050
Received: 9 February 2016 / Revised: 14 March 2016 / Accepted: 18 March 2016 / Published: 24 March 2016
Wind-tunnel experiments were conducted to evaluate the effect of additional structure (building, sea wall and banking) on the effective stack height, which is usually used in safety analyses of nuclear power facilities in Japan. The effective stack heights were estimated with and without the additional structure in addition to the reactor building while varying several conditions such as the source height, the height of additional structure and the distance between the source position and the additional structure. When the source height is equivalent to the reactor building height, the additional structure enhances both the vertical and horizontal gas dispersion widths and decreases the ground gas concentration, and it means that the additional structure does not decrease the effective stack height. When the source height is larger than the reactor height, the additional structures might affect the effective stack height. As the distance between the source and the additional structure decreases, or as the height of the additional structure increases, the structure has a larger effect on the effective stack height. View Full-Text
Keywords: wind-tunnel experiment; effective stack height; gas dispersion wind-tunnel experiment; effective stack height; gas dispersion
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MDPI and ACS Style

Michioka, T.; Sada, K.; Okabayashi, K. Effect of Additional Structure on Effective Stack Height of Gas Dispersion in Atmosphere. Atmosphere 2016, 7, 50. https://doi.org/10.3390/atmos7040050

AMA Style

Michioka T, Sada K, Okabayashi K. Effect of Additional Structure on Effective Stack Height of Gas Dispersion in Atmosphere. Atmosphere. 2016; 7(4):50. https://doi.org/10.3390/atmos7040050

Chicago/Turabian Style

Michioka, Takenobu; Sada, Koichi; Okabayashi, Kazuki. 2016. "Effect of Additional Structure on Effective Stack Height of Gas Dispersion in Atmosphere" Atmosphere 7, no. 4: 50. https://doi.org/10.3390/atmos7040050

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