Inhalation class default for ICRP 30

["Thatcher, Drew" <dht0303@hub.doh.wa.gov>]

Radsafers:

I've been doing some pathway analysis for a project and need to use ICRP 
26/30 methodology.  I  am unsure of the appropriate inhalation class to 
use as a default when no specific information is available regarding 
absorption type.  ICRP 72 provides recommended default absorption types 
for F,M, and S (they generally recommend type M when all three absorption 
types are possible).  It is appropriate to use these recommendations on 
defaults and apply them to the D,W and Y inhalation classes in ICRP 30, 
i.e. - can I use the absorption type M recommendation from ICRP 72 and 
apply that to ICRP 30 using a class W compound?

Is there a source or reference for default absorption types that would 
apply to ICRP 30?  My primary interest is for U and Pu isotopes where the 
differences in DCFs between absorption types has an impact on my results. 
 Any/all assistance would be appreciated.

Sincerely,
Andrew H. Thatcher, MSHP, CHP
Washington Department of Health
360-236-3255 voice
360-236-2255 fax
dht0303@doh.wa.gov
-standard disclaimers apply-