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Turbulent transfer characteristics of radioiodine effluents from air to grass

Conference:

Abstract

A total of 20 controlled field releases of radioiodine have been performed at the National Reactor Testing Station in Idaho as a portion of a program to study the transmission of gaseous radioiodine through the air-vegetation-cow-milk-human chain. Most of the releases were conducted over typical pasture grasses during different wind and stability conditions. Radioiodine adherence to grass and carbon plates was measured during most of the tests. Vertical air concentration profiles and turbulence parameters were measured to determine flux characteristics. Analysis of the data reveals the complex interdisciplinary nature of transfer of radioiodine from air to a natural surface. The data are in reasonable agreement with the deposition models of Sheppard and Chamberlain when corrections for the physical and biological receptiveness of the grass and grass density are made. The average ratios of momentum to mass flux were found to be 0.9 in stable conditions and 1.4 in unstable conditions. These ratios demonstrate the effect on mass flux in the lowest 4m by a surface that acts as a partial sink for gaseous effluents. This series of releases indicates the need for further research on the biological receptiveness of grass and turbulent transfer within a grass canopy. (author)
Authors:
Markee, E. H. [1] 
  1. ARFRO, Environmental Science Services Administration, Idaho Falls, Idaho (United States)
Publication Date:
Jul 01, 1967
Product Type:
Conference
Report Number:
AECL-2787
Resource Relation:
Conference: USAEC Meteorological Information Meeting, Chalk River, Ontario (Canada), 11-14 Sep 1967; Other Information: 4 refs., 1 tab., 7 figs.; Related Information: In: Proceedings of the USAEC Meteorological Information Meeting| by Mawson, C.A. (ed.)| 630 p.
Subject:
54 ENVIRONMENTAL SCIENCES; AIR; GASEOUS WASTES; GRAMINEAE; GROUND RELEASE; IODINE; RADIOISOTOPES; TURBULENCE
OSTI ID:
22141933
Research Organizations:
Atomic Energy of Canada Limited, Chalk River, Ontario (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
TRN: CA1300270096534
Availability:
Available from INIS in electronic form
Submitting Site:
CANN
Size:
page(s) 589-601
Announcement Date:
Oct 24, 2013

Conference:

Citation Formats

Markee, E. H. Turbulent transfer characteristics of radioiodine effluents from air to grass. Canada: N. p., 1967. Web.
Markee, E. H. Turbulent transfer characteristics of radioiodine effluents from air to grass. Canada.
Markee, E. H. 1967. "Turbulent transfer characteristics of radioiodine effluents from air to grass." Canada.
@misc{etde_22141933,
title = {Turbulent transfer characteristics of radioiodine effluents from air to grass}
author = {Markee, E. H.}
abstractNote = {A total of 20 controlled field releases of radioiodine have been performed at the National Reactor Testing Station in Idaho as a portion of a program to study the transmission of gaseous radioiodine through the air-vegetation-cow-milk-human chain. Most of the releases were conducted over typical pasture grasses during different wind and stability conditions. Radioiodine adherence to grass and carbon plates was measured during most of the tests. Vertical air concentration profiles and turbulence parameters were measured to determine flux characteristics. Analysis of the data reveals the complex interdisciplinary nature of transfer of radioiodine from air to a natural surface. The data are in reasonable agreement with the deposition models of Sheppard and Chamberlain when corrections for the physical and biological receptiveness of the grass and grass density are made. The average ratios of momentum to mass flux were found to be 0.9 in stable conditions and 1.4 in unstable conditions. These ratios demonstrate the effect on mass flux in the lowest 4m by a surface that acts as a partial sink for gaseous effluents. This series of releases indicates the need for further research on the biological receptiveness of grass and turbulent transfer within a grass canopy. (author)}
place = {Canada}
year = {1967}
month = {Jul}
}