[ RadSafe ] Low Dose Radiation Benefits

[Otto G. Raabe]

At 10:55 AM 7/22/2011, you wrote:
>At what level should there be some concern?   6 pCi/L? 8? 10? 100?
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According to Richard Thompson ("Epidemiological Evidence for Possible 
Radiation Hormesis from Radon Exposure: A Case-Control Study 
Conducted in Worcester, MA, Dose-Response 9:59-75,2011): "...this 
model predicts an AOR that is numerically less than 1.0 for radon 
exposures up to 545 Bq m-3 versus the above baseline, reference exposure."

 From this 545/37= 14.7 pCi/L. Of course the dose to the bronchial 
epithelium various considerably depending on local conditions. A 
reasonable safety limit would be 10 pCi/L. This is the same value I 
estimated from dose calculations.

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Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754   FAX: (530) 758-6140
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