RE: tritium removable contamination

["Edwards, Richard W" <Richard.Edwards@PSS.Boeing.com>]

I recall an application note from Packard that summarized a number of studies. Packard's conclusion was glass fiber was preferable because of a high overall efficiency due, in part, to it's very high collection efficiency when wetted. I believe the note was released in '93.

Note: I have found that there are a wide variety of peanuts that still dissolve, albeit slowly in modern cocktails. It just isn't as universal as it used to be. Which peanuts will dissolve seem to depend on which cocktail formulation you use. Particularly troublesome have been the new biodegradeable peanuts that are made out of starch. I haven't been able to get them to dissolve in anything Washington State will allow me to use.

Rick Edwards, Analyst
The Boeing Company
richard.w.edwards@boeing.com

> ----------
> From: 	Bob Wilson[SMTP:bmwils2@pop.uky.edu]
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Monday, March 06, 2000 6:06 AM
> To: 	Multiple recipients of list
> Subject: 	Re: tritium removable contamination
> 
> Bill,
> 
> After many years of effort, I have to accept that a standard wipe (as used
> for anything else) is about as good as we can get.  We use dry filter paper
> wipes.  Multiply the LSC CPM by 4 or 5 or 10 or whatever makes one feel
> comfortable to get activity.
> 
> I sure do miss those peanuts, though!
> 
> Bob 
> 
> At 07:44 AM 3/6/00 -0600, you wrote:
> >I'm looking for a methodology for determining removable tritium
> >contamination on surfaces.  I used to use packing peanuts, which
> >dissolved in liquid scintillation cocktail, but the new, nonhazardous
> >cocktails won't dissolve this.
> >
> >I'd be interested in learning how others do this.
> >
> >The opinions expressed are strictly mine.
> >It's not about dose, it's about trust.
> >
> >Bill Lipton
> >liptonw@dteenergy.com
> >
> >
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> Bob Wilson, Director
> Radiation Safety Office
> University of Kentucky
> 102 Animal Pathology
> Lexington, KY  40546-0076
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> bmwils2@pop.uky.edu
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