RE: sealed sources

["Kiellman, Tracy" <KiellmanT@syncor.com>]

The sources are I-125 and Pd-103 seeds.  (Tedious to count for inventory!)
Has anyone else had experience with placing a security seal on a bin in lieu
of counting sources as Dave Derenzo suggested?
Thanks for the help!

Tracy Kiellman
Associate Health Physicist

> What sealed sources have short enough half-lives to be decayed in =
> storage? Only I-125 seeds come to mind at the moment. But, 
> even so, the =
> DIS paradigm is generally held only to be applicable to 
> "waste", that is =
> contaminated gloves, glassware, empty stock vials, etc. The 
> idea is that =
> the activity you start out with is very small so that it will reach =
> background after ten half-lives or so.  If you start out with a 10 =
> millicurie source, say, after ten half-lives you've still got 10 =
> microcuries, which (hopefully) will be far above your background.=20
> 
> Your regulator may have objections to placing sources into 
> DIS. I would.
> 
> **********
> Clayton Bradt, CHP <raldrich@nysnet.net>        phone: 518/457-1202
> Assoc. Radiophysicist                                         
>     fax:   =
>    518/485-7406
> NYS Dept. of Labor
> Radiological Health Unit
> Blg.12, Rm 169
> State Office Campus
> Albany, NY 12240
> **************************************************************

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