variations in background

["Michael G. Stabin" <michael.g.stabin@vanderbilt.edu>]

I quite often cite levels of natural background radiation, for comparisons

to other exposures. Sometimes, we say that very low exposures are "within

the variability" of natural background. Can anyone tell me, for the US, what

a reasonable value is for this variability? For Tennessee, we cite an

average value of 3 mSv/y, but what would a reasonable estimate be for the

variability of this number, for ex, one standard deviation? Thanks.



Mike



Michael G. Stabin, PhD, CHP

Assistant Professor of Radiology and Radiological Sciences

Department of Radiology and Radiological Sciences

Vanderbilt University

1161 21st Avenue South

Nashville, TN 37232-2675

Phone (615) 343-0068

Fax   (615) 322-3764

e-mail     michael.g.stabin@vanderbilt.edu

internet   www.doseinfo-radar.com







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