ICRP Ra-226 inhalation dose coefficients

["Chris Clement" <clement@vaxxine.com>]

Dear Radsafers:

I was just going through ICRP-72 "Age-dependent Doses to Members of the
Public from Intakes of Radionuclides: Part 5, Compilation of Ingestion and
Inhalation Dose Coefficients".  Paragraph 2 of the Introduction reads:

"Values of dose coefficients for workers are also given in the
International Basic Safety Standards and the Euratom Directive.  With the
exception of inhalation dose coefficients for Ra-226, these values are the
same as those given in ICRP Publication 68 (ICRP, 1994b)."

As it so happens, I am also interested in doses to workers, and in
particular doses due to Ra-226.  I would like to know what change has been
made to the Ra-226 inhalation dose coefficient since ICRP-68 (and why if
possible), but don't have immediate access to the documents noted above. 
Perhaps someone out there could fill me in?

Thanks in advance,

Chris Clement
Scientific Specialist
Low-Level Radioactive Waste Management Office
Atomic Energy of Canada Limited
clement@vaxxine.com