Re: Estimate DAC

[LIPTONW@detroitedison.com]

What you are talking about, here, is the "resuspension factor", which is 
defined as the ratio of the airborne concentration (uCi/cm3) to surface 
contamination level (uCi/cm2).  This is discussed in "Radiological 
Assessment", by John Till et. al., NUREG/CR-3332.  This should be used with 
caution, however, since they are influenced by factors such as ventilation and 
traffic.   
 
The opinions expressed ares stricly mine. 
Here's to a risk free world, and other fantasies. 
 
Bill Lipton 
liptonw@detroitedison.com

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• To: Multiple,recipients,of,list,radsafe@romulus.ehs.uiuc.edu
• Subject: Estimate DAC
• From: "radsafe@romulus.ehs.uiuc.edu" <radsafe@romulus.ehs.uiuc.edu>
• Date: 11 Jun 97 10:06:57
• Reply-to: radsafe@romulus.ehs.uiuc.edu

I am reasearching different methods that people are using to estimate
DAC based on loose surface contamination levels for input into ALARA
evaluations for respiratory protection, engineering controls, etc. The
method should be more of a "thumb rule" that can be used as a field
evaluation rather than a detailed calculation using particle size and
the like. It is for a nuclear power plant application using Co-60 as the
predominant nuclide. Any ideas would be greatly appreciated.

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