[ RadSafe ] Lost Check Source

Geo>K0FF GEOelectronics at netscape.com
Tue Dec 11 13:37:32 CST 2007

The exempt quantity of Tc-99 is 10 uCi in USA, NRC 30.71 Schedule B.

Anything less than that is a landfill disposal item.

Being a low energy beta emitter, you would have to be right on top of it to 
detect it with a sensor. 84.6 keV average beta would have a range in air of 
1 foot.

George Dowell
New London Nucleonics Lab

----- Original Message ----- 
From: <Cehn at aol.com>
To: <radsafe at radlab.nl>
Sent: Tuesday, December 11, 2007 1:09 PM
Subject: [ RadSafe ] Lost Check Source

>A client of mine has mis-placed a 27 pCi Tc-99 check source.  The  search 
> on for it. Does anyone have experience (post 9/11) with the  regulators on
> this situation?
> Joel I. Cehn, CHP
> _joelc at alum.wpi.edu_ (mailto:joelc at alum.wpi.edu)
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