effluent concentrations in 10CFR20, App. B

[LIPTONW@detroitedison.com]

I have a question regarding the bases for the "Effluent Concentrations" of 
10CFR20, Appendix B, Table 2.  The first paragraph of the explanatory text
for 
Table 2 states that: 
 
 "...The concentration values given in Columns 1 and 2 of Table 2 are 
equivalent to the radionuclide concentrations which, if inhaled or ingested 
continuously over the course of a year, would produce a total effective dose 
equivalent of 0.05 rem (50 mrem or 0.5 millisieverts)." 
 
This seems to be contradicted, however, in the paragraph which states that: 
 
  "...For those radionuclides for which the stochastic limit is governing,
the 
occupational stochastic inhalation ALI was divided by 2.4 E9 ml, relating
the 
inhalation ALI to the DAC ... and then divided by a factor of 300.  The
factor 
of 300 includes the following components:  a factor of 50 to relate the
5-rem 
annual occupational dose limit to the 0.1 rem limit for members of the
public, 
a factor of 3 to adjust for the difference in exposure time and the
inhalation 
rate for a worker and that for members of the public; and a factor of 2 to 
adjust the occupational values (derived for adults) so that they are 
applicable to other age groups." 
 
This implies that continuous exposure at an Effluent Concentration would 
result in an annual TEDE of 100 mrem. 
 
Which is it? 
 
The opinions expressed are strictly mine. 
It's not about dose, it's about trust. 
 
Bill Lipton 
liptonw@detroitedison.com