Hot particle detection using uncertainties in activity measurements of soil

Nageldinger, Guido, Flowers, Alan, Henry, Brian and Postauk, Julie (1998) Hot particle detection using uncertainties in activity measurements of soil. Health Physics, 74(4), pp. 472-477. ISSN (print) 0017-9078

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The uncertainty in gamma spectroscopic activity measurements is investigated for soil containing hot particles. A radioactivity inhomogeneity uncertainty needs to be taken into account, which depends on the density of hot particles in the sample geometry, the distribution of their activities, and the specific source-detector geometry. The maximum activity error due to hot particles in our sampled Chernobyl soil with a 137Cs activity of 100 kBq kg(-1) soil was 6% for our source detector geometry. The methodology presented might have a practical application in nuclear power plants to detect hot particles in a large quantity of dust or dirt. The number of hot particles present can be estimated if the activity of all particles is assumed to be similar. With this assumption 100 g of the investigated soil sample would contain about 500 hot particles with an approximate activity of 20 Bq each.

Item Type: Article
Uncontrolled Keywords: spectroscopy, gamma, hot particles, soil, chernobyl
Research Area: Physics
Faculty, School or Research Centre: Faculty of Science (until 2011) > School of Life Sciences
Depositing User: Automatic Import Agent
Date Deposited: 29 Mar 2010 11:41
Last Modified: 05 Oct 2010 10:53

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