Re: Radon Screening

[Schoenhofer <schoenho@via.at>]

At 10:59 01.10.1996 -0500, you wrote:
>Need some information on instrumentation.  I am looking for a piece(s) of
personnel monitoring equipment 
>that can eliminate or identify contamination contribution from Radon and
daughters.  Our personnel 
>release criteria is:
>500dpm/100cm-2 Alpha and 5000dpm/100cm-2 Beta (Total fixed and Removable).
>
>On certain days we exceed these numbers from radon, but do not have a good
way to let individuals 
>continue without having them stand around for decay.  What is out there for
quick identification at these 
>levels?
>-------------------------------------------------------------------------

David,

Could you please give a little more information about the problem you face
with radon and daughters? Is it the question of persons being contaminated?
(Obviously). Where and what do they work to come in contact with such
tremendous amounts of radioactivity to be so highly contaminated?

Radon is a noble gas and cannot be deposited on normal surfaces to give rise
to contamination. Daughter products can of course plate out. I do not know
the instruments you use, but a reading of 500dpm/100cm2 for alphas and ten
time for betas seems to be rather high - especially for plate out of radon
progeny. What kind of contamination do you want to distinguish the "radon" from?


Franz
Schoenhofer
Habichergasse 31/7
A-1160 WIEN
AUSTRIA/EUROPE
Tel./Fax:	+43-1-4955308
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e-mail:		schoenho@via.at