NRC provides generic soil criteria (DCGLs) using latest version of DandD

["Abelquist, Eric" <AbelquiE@orau.gov>]

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]