Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Estimation of radioactivity levels associated with a 90Sr dirty bomb event
AbstractThis paper reports the results of using a Gaussian model to estimate the maximum inhalation doses (mSv), the spatial extent (km2) and radioactivity (Bq) of contamination within an urban area after the initial dispersion of 90Sr radiological dispersion device (dirty bomb) in a terrorist event. For modeling purposes, aerosol dispersion of approximately 7g of 90Sr equaling 3.7×1013Bq (1000Ci) with effective release heights of 50 and 100m above street level is estimated under varying local-scale atmospheric conditions. Maximum inhalation doses at the level of 1, 5, 10, 50mSv are used as evaluative criteria to assess probable consequences. The intentional release of a relatively small amount of 90Sr using a conventional explosive has the potential to cause internal exposure to beta-radiation with relatively high maximum inhalation doses achieving hundreds of mSv, but the spatial extent of the area within which high exposures might occur is very small with most of the population receiving maximum inhalation doses between 1 and 10mSv. The extent of radiation contamination (area and activity) is dependent on 90Sr particle size, the height of release, and local weather conditions.
Estimation of radioactivity levels associated with a 90Sr dirty bomb event
AbstractThis paper reports the results of using a Gaussian model to estimate the maximum inhalation doses (mSv), the spatial extent (km2) and radioactivity (Bq) of contamination within an urban area after the initial dispersion of 90Sr radiological dispersion device (dirty bomb) in a terrorist event. For modeling purposes, aerosol dispersion of approximately 7g of 90Sr equaling 3.7×1013Bq (1000Ci) with effective release heights of 50 and 100m above street level is estimated under varying local-scale atmospheric conditions. Maximum inhalation doses at the level of 1, 5, 10, 50mSv are used as evaluative criteria to assess probable consequences. The intentional release of a relatively small amount of 90Sr using a conventional explosive has the potential to cause internal exposure to beta-radiation with relatively high maximum inhalation doses achieving hundreds of mSv, but the spatial extent of the area within which high exposures might occur is very small with most of the population receiving maximum inhalation doses between 1 and 10mSv. The extent of radiation contamination (area and activity) is dependent on 90Sr particle size, the height of release, and local weather conditions.
Estimation of radioactivity levels associated with a 90Sr dirty bomb event
Reshetin, Vladimir P. (Autor:in)
Atmospheric Environment ; 39 ; 4471-4477
10.03.2005
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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