Re: <no subject>

[roseb@smtp-gw.gdls.com (Boyd H Rose)]

     Don,
     
     Take a look at 10CFR71.74(a)(3).  The SI (Special or U.S. Customary) 
     units are peppered throughout part 71 as well as the rest of 10CFR to 
     varying degrees.
     
     It seems odd that you would concern yourself with finding explicit 
     definitions for SI to Special or U.S. Customary dimension conversions 
     given the propagation of error as a result of instrument precision, 
     statistical variations in the radiation measured as well as 
     background, calculation roundoffs, etc.  Taking into account a few 
     tenths of a cm given the other possible sources of error in a 
     radiation measurement may result in overstating the precision of the 
     measurement as well as decreasing its accuracy.
     
     It seems that the NRC gives both SI and (Special or U.S. Customary) 
     units as an aid to those of us who may be using one or the other or 
     both units.  It is doubtful that the NRC would cite anyone on the 
     precision of a measurement as long as the measurement is reported with 
     the appropriate precision and accuracy. 
     
     
     Boyd H. Rose, CM, IHIT
     Radiation Protection Officer
     General Dynamics Land Systems Division
     roseb@gdls.com
     
     The opinions expressed above are solely my own and do not under any 
     circumstance reflect those of my employer.




______________________________ Reply Separator _________________________________
Subject: <no subject>
Author:  radsafe@romulus.ehs.uiuc.edu at Internet/Unix
Date:    5/14/98 9:45 AM






Hello fellow radsafers:
     
Can anyone provide a reference where the NRC clearly stated that 12 inches 
is equivalent to 30 cm?  This is in regard to 10CFR20 definitions for 
Radiation and High Radiation Area measurements.  I did see in Q&A #52 where 
30 cm was given with 12 inches in parenthesis,  but I was looking for 
something more clear and concrete. I realize I am concerning myself with two 
tenths of a cm, but you know how important these nuances can be.
     
     
Don Flahardy
Seabrook Station
Flahadt@Naesco.com
603 773-7312