AW: [ RadSafe ] Radioactive Material, Commerce, and DOT Regulations

Doug Aitken jdaitken at
Mon May 14 18:20:44 CDT 2007

At 03:37 PM 5/14/2007, Franz Schönhofer wrote:
>Doug et al.,
>Where do you find a "public exposure limit in EU regs" of 2.5 microSv/hr???
>This corresponds to 21.9 mSv/y. Either your or my calculator is wrong!
>Please do not distribute such wrong information on RADSAFE, we are molested
>enough by mass media and the relevant groups.

The last thing I want is to enter into a protracted and/or vituperative 
discussion over this. And I sure don't want to be accused of misinformation....

I do realize that the general Dose Limit for public exposure is 1 mSv per 
year. And I should not have abused the group by mis-stating exposure limit, 
rather than dose rate.

However, whether it is "cast in stone" as a regulation, or just a practice 
recommended by a number of organizations, guided by national regulators, I 
was under the impression that the acceptable maximum "dose rate" in a 
public place (i.e. uncontrolled area) is 2.5 microsieverts/hr (given that 
it is apparent that only under VERY exceptional circumstances would an 
individual member of the public be exposed to any source 24 hrs/day, 365 
days per year.....).

This certainly is the accepted interpretation used in my industry for the 
definition/design of storage and operations involving sources of ionizing 

Perhaps you can correct me if I am totally incorrect in this?


Doug Aitken                     Office Phone Use Cell phone!
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