[ RadSafe ] Background in dosimetry

Michael LaFontaine, P. Phys. physics at execulink.com
Wed May 9 17:46:57 CDT 2012

Hello Franz,

In Canada, background dose is not subtracted. The 
regulating guideline is, "Advisory Committees on 
Radiological Protection and on Nuclear Safety (ACRP/ACNS) 1990.
Recommended De Minimis Radiation Dose Rates for 
Canada. AECB INFO-355." I believe I have a PDF 
verion of the guide - I can forward it to you if you wish.

Best regards,


At 06:01 PM 09/05/2012, you wrote:
>Dear Radsafers, I have  been working quite a lot 
>with ISO, but even much more with the Austrian 
>Standardisation Institute (for more than 20 
>years. Recently we have decided to rework the 
>standards on dosimetry. We had recently a 
>meeting and we had very fierce discussions about 
>the question of "backgrounds" which should or 
>should not be substracted. This was  both for 
>external radiation and radon exposue. May I ask 
>you to comment on this topic? What is the 
>legislation and the practice in your country, 
>explicitely inviting all non-US -scientists to 
>comment. It might be that different states in 
>the USA have different legislation, so this 
>information would be very welcome as well. 
>Please observe the fundamental difference on 
>external radiation and radon!!! The European 
>Union Legislation does according to our 
>conclusion not provide any solution for this 
>problem. Since doses are recorded all over the 
>world, there simply must be legislation, 
>regulation and practice!!! Please provide me 
>with information, but refrain from "information" 
>like "I think", "I believe", " I suggest", "I 
>propose", "I ´recommend" . I need hard facts. 
>Please be aware that I intend to forward your 
>messages to our working group - if you do not 
>want to have your name in that, please tell 
>me.  I hope for a comprehensive number of 
>informations. Thanks to anybody in advance. Best 
>wishes, Franz -- Franz Schoenhofer, PhD, MinRat 
>Habicherg. 31/7 A-1160 Vienna Austria mobile: 
>++43 699 1706 ´gilsa 
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Michael LaFontaine, P. Phys.  

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