[ RadSafe ] Fwd: Which welding rods are hot?

[Chris Alston]

Hi Stewart

Thing is, thoron (radon-220) has a 55-second half-life.  So, probably
only the tiniest quantities can escape the rod, from its very surface.

Cheers
cja


---------- Forwarded message ----------
From: Stewart Farber <safarber at optonline.net>
Date: Mon, Nov 5, 2012 at 4:27 PM
Subject: Re: [ RadSafe ] Which welding rods are hot?
To: "The International Radiation Protection (Health Physics)
Mailing	List" <radsafe at health.phys.iit.edu>


TIG welding rods. Labeled 3% thoria by weight. Quite a source. I've
been to some welding supply houses to get LN2 which have thousands of
lbs of these TIG rods on shelves behind the counter.  Think of the
employees Rn-220 inhalation !


Stewart Farber, MS Public Health
Farber Medical Solutions, LLC

[203] 441-8433 [o]
[203] 522-2817 [m]
[203] 367-0791 [fax]


-----Original Message----- From: Ted de Castro
Sent: Monday, November 05, 2012 3:05 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [ RadSafe ] Which welding rods are hot?

I know I've encountered some considerably hot welding rods - but didn't
notice the type designation.

I just checked my own supply - so 60's, 70's and 78's - I was SURE at
least my 6010 would be hot --- but NO - they none were.

So - asked of anyone who has some hot ones --- what type?

thanks
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