Re: NRC provides generic soil criteria (DCGLs) using latest

[steve.rima@DOEGJPO.COM (Steven Rima)]

     Very interesting reading. Does anyone else find at least some of these 
     values to be incredibly low? For example, the EPA has codified (40 CFR 
     192, Subpart B) the soil cleanup level for Ra-226 from uranium 
     processing activities to be 5 pCi/g above background for the top 15 cm 
     of soil, and 15 pCi/g for deeper soil. Using the NRC's calculated 
     concentration of 0.7 pCi/g that would result in 25 mrem/y, the EPA's 
     standardized cleanup level of 5 pCi/g would equal 179 mrem/y!!! Seems 
     to be more than just a little disagreement here.
     
     Wouldn't it be nice if the various regulatory agencies that are 
     attempting to regulate D&D activities could agree? I guess I'll wish 
     I'd win the lottery while I'm at it. Hmmm, I wonder which one will 
     happen first.
     
     My opinion only
     
     Steven D. Rima, CHP, CSP
     Manager, Health Physics and Industrial Hygiene
     MACTEC-ERS, LLC
     steven.rima@doegjpo.com


______________________________ Reply Separator _________________________________
Subject: NRC provides generic soil criteria (DCGLs) using latest vers
Author:  "Abelquist; Eric" <AbelquiE@orau.gov> at Internet
Date:    12/7/99 1:21 PM


Dear Radsafers-
     
Please note the attached Federal Register notice from the NRC related to 
soil concentrations that correspond to the 25 mrem/y release criterion.  The 
NRC has used an updated version of DandD (somewhat less conservative default 
parameter values).  Some of the more common radionulcide DCGLs (in pCi/g) 
are as follows:
     
Co-60.....................................  3.8 E+00 
Sr-90.....................................  1.7 E+00 
Cs-137....................................  1.1 E+01 
Ra-226....................................  7.0 E-01 
Ra-226+C \4\..............................  6.0 E-01 
Th-232....................................  1.1 E+00 
Th-232+C..................................  1.1 E+00 
U-234.....................................  1.3 E+01 
U-235.....................................  8.0 E+00 
U-235+C...................................  2.9 E-01 
U-238.....................................  1.4 E+01 
U-238+C...................................  5.0 E-01
     
Check it out.
     
Regards,
Eric Abelquist
     
     
Eric W. Abelquist
ORISE
P.O. Box 117
Oak Ridge,TN 37831
Tel (423) 576-3740
FAX (423) 241-3497
Email: abelquie@orau.gov 
     
[Federal Register: December 7, 1999 (Volume 64, Number 234)] 
[Notices]               
[Page 68395-68396]
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