[ RadSafe ] Hot particles on automobile air filters

Busby, Chris C.Busby at ulster.ac.uk
Fri Jun 24 14:27:23 CDT 2011

-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu on behalf of Clayton J Bradt
Sent: Fri 24/06/2011 19:26
To: radsafe at agni.phys.iit.edu
Subject: Re: [ RadSafe ] Hot particles on automobile air filters
Chris Busby states:

"But these filters have been across the Pacific and in the mail system for 
a long time. 
The gamma spectrum of the filters shows Cs137 and I131." 

Now I'm curious.  Are these air filters replacement parts manufactured in 
Japan within the past 3 months and shipped to the US? 
If so, and assuming for the sake of argument that there are hot particles 
in the air filters, they would likely have been introduced during 
the manufacturing process - not during use.

Further questions: Have hot particles been found through the environmental 
monitoring in Japan?  Where is the manufacturing plant for the filters in 
relation to Fukushima? Has monitoring been performed at the manufacturing 

Clayton J. Bradt
Principal Radiophysicist
NYS Dept. of Health
Biggs Laboratory, Room D486A
Empire State Plaza
Albany, NY 12201-0509


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I cant see why you are getting so exercised. You know that there are hot particles coming out of Fukushima. There was a autoradiograph of a spinach leaf with hot particles on it. Didnt you see that? It was on the internet. I can probably find it and put it up. I think its on www.llrc.org It was Japanese university as I recall. No we just had the filters sent to us. No one checked the manufacturer but they are from Japanese cars and I have the location of the cars, the mileage after the accident and so forth. What is your point? That the manufacturer added hot particles? Is that credible? My own 5 filters from Fukushimna and from Tokyo have been sent by some reporters whose editor collected the filters. I will let you know the results in due course.

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