Re: Kr-85

["JERRY ROSEN" <rosen@rso.radsafe.pitt.edu>]

Kr-85 has a 10.7 yr half life
I've worker with people in the past that wanted to used krypton as a 
counting gas.  The Kr-85 was a problem, creating a "high" 
background..
>      Joe,
>      
>      When I add up all the natural abundances of all the grey boxes on the 
>      Kr part of the chart of nuclides, I get 100%.  Kr-85 has a short half 
>      life to stay around for any period of time (~4 1/2 hrs).  I could not 
>      imagine Kr-85 being a rad problem, unless it was being produced by 
>      nuclear methods and not cryogenic-from the atmosphere methods.  
>      
>      Robert A. Jones
> 
> 
> ______________________________ Reply Separator _________________________________
> Subject: Kr-85
> Author:  Joe Bianconi <umtrahp@concentric.net> at -MailLink
> Date:    12/4/96 9:42 AM
> 
> 
> Radsafers:
> Reading a report from a company that produces specialty gases (e.g., Kr from 
> the atmosphere via a cryogenic method), they are convinced that they have a 
> rad problem with Kr-85.  I do not know the basis for their concern. Has 
> anyone ever heard of a similar situation.
> I would appreciate any information you have.
>                 Joe Bianconi
>          Rust Federal Services, Inc.
> Uranium Mill Tailings Remedial Action Project
>      2309 Renard Place SE, Suite 300
>           Albuquerque, NM 87106
>  505/246-2537 voice        505/766-1813 fax
>      
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> Subject: Kr-85
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Jerry Rosen

University of Pittsburgh
Phone:  412-624-2728
Fax:    412-624-3562
Email:  Rosen@radsafe.pitt.edu