[ RadSafe ] Exposed workers - "Background" radon

[Luke McCormick]

Franz,

Here in the US, OSHA limits occupational workers to 100 pCi/liter total exposure. (sorry for the mixed units. I didn't make them up). There is no background subtraction listed.

Luke McCormick


 
> From: franz.schoenhofer at chello.at
> To: radsafe at radlab.nl; norm-tenorm at yahoogroups.com
> Date: Tue, 23 Jun 2009 22:30:59 +0200
> CC: 
> Subject: [ RadSafe ] Exposed workers - "Background" radon 
> 
> Dear RADSAFErs,
> 
> 
> 
> I am now reviewing an Austrian Standard on „Background Radon – Geogenic
> Radon“ exposure which should according to a recent Austrian ordinance be
> substracted from the actual radon concentration in the air the employees
> work in. First of all I think that for the determination of dose to workers
> the total radon concentration has to be used, whatever its origin is!
> Second: I cannot imagine that it is possible to distinguish at a working
> place the radon coming from the material containing NORM and the radon for
> instance exhaled from the ground, liberated from water (waterworks!) or
> building material or other sources. It is a fact that the worker will
> receive a dose composed from all these components!
> 
> 
> 
> This is my opinion, but I would very much like to know, what the situation
> and the regulations are in other countries. What is the maximum permissible
> radon concentration at workplaces or for the dose from it? Is there any
> provision in any country for subtracting „geogenic“ radon from the radon
> concentrations liberated at the working place from materials processed? 
> 
> 
> 
> I would appreciate answers as soon as possible! Thank you!
> 
> 
> 
> Best regards,
> 
> 
> 
> Franz
> 
> 
> 
> Franz Schoenhofer, PhD
> 
> MinRat i.R.
> 
> Habicherg. 31/7
> 
> A-1160 Wien/Vienna
> 
> AUSTRIA
> 
> 
> 
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