[ RadSafe ] Hot particles on automobile air filters

[Busby, Chris]

-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu on behalf of ZIC Joe -PICKERING
Sent: Thu 23/06/2011 01:14
To: 'The International Radiation Protection (Health Physics) Mailing	List'
Subject: Re: [ RadSafe ] Hot particles on automobile air filters
 
Mike,

I guess it all depends on your definition of a "hot particle".  This could just mean that something above background was detected.  We define a hot particle as a radioactive particle with a contact dose rate of >100 mrem/h.  I can't imagine any hot particles, NORM, or TENORM in the public domain of Washington having dose rates of that magnitude?

Josip Zic   M.Sc, CHP
Health Physicist, Pickering A 
Ontario Power Generation


-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu [mailto:radsafe-bounces at agni.phys.iit.edu] On Behalf Of Brennan, Mike (DOH)
Sent: Wednesday, June 22, 2011 7:57 PM
To: The International Radiation Protection (Health Physics) MailingList
Subject: [ RadSafe ] Hot particles on automobile air filters

I have received several calls and emails from people in Washington who
are alarmed about "hot particles" being found on automobile air filters.
The only source I found for this is a vague statement from Arnold
Gundersen in an article he gave to Aljazeera.  I admit that I do not
give to this source the same credence I would give to an article in a
peer reviewed journal.  

Has anyone seen anything else about this?  
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I have seen the autoradiographs
Chris


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