Re: calculation of dose to biota

[JMUCKERHEIDE@delphi.com]

Al Tschaeche wrote in response to:

> >       however, these (RBEs)are currently defined only for the
> >           purpose of human radiation protection.  Factors equivalent
> >           to Q for aquatic organisms are required 
> 
> True, and this is the problem.  No one to my knowledge has developed
> generally-accepted RBEs for alphas for anything but humans.

I think this implies that the RBEs are reasonably well established for humans, 
which is not really true. As John Cameron and others have reported, NCRP
established that the quantity can't be determined (was it NCRP 104?) and then
applied/used such a value (as WsubR) in #116 even though it can't be
determined (consider the ranges of such changes reported, with the "central"
values usually 3 to 20). 

Thanks.

Regards, Jim Muckerheide
jmuckerheide@delphi.com