Clams as Indicators of Strontium-90.


Fresh-water clams concentrate strontium-90 in their shells and may be used as indicators of the Sr(90) contamination of their environment. Analysis of data derived from the specific activity of Sr(90) in shells showed that Sr(90) released to the Tennessee River system remained in solution and that concentrations to a distance of 500 miles from the release site can be predicted on the basis of the dilution of contaminated White Oak Creek water by uncontaminated Clinch-Tennessee River water.


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