Re: Ag-110m Production

[Lew Helgeson <lewhelgeson@helge.com>]

Don't forget thermocouples. The total amount is small compared to the
O-rings, of course, but if you have a small reactor with no O-rings with
silver content, then you will probably find silver from the thermocouples.

Lew Helgeson

At 03:52 PM 12/20/1999 -0600, you wrote:
>     Jim,
>     
>     In a former life as an HP at several power reactors, we had to deal 
>     with this. The "O-Ring" (really big one!) that is between the reactor 
>     vessel and reactor head is made of a metal alloy, one constituent of 
>     which is silver. (Silver is used because it's soft.) As the o-ring 
>     erodes/corrodes, silver is released into the coolant system. It's 
>     activated into Ag-110m as it passes through the reactor at power.
>     
>     I'm not aware of any other sources, but I've been out of that part of 
>     the industry for about 10 years now.
>     
>     Steven D. Rima, CHP, CSP
>     Manager, Health Physics and Industrial Hygiene
>     MACTEC-ERS, LLC
>     steven.rima@doegjpo.com
>     
>
>
>______________________________ Reply Separator 
>_________________________________
>Subject: Ag-110m Production
>Author:  PATTERSON.JG.Mr.-PICKERING@romulus.ehs.uiuc.edu at Internet
>Date:    12/20/99 3:17 PM
>
>
>RADSAFER's - can anyone enlighten me as to how Ag-110m is produced in 
>nuclear reactors?
>     
>Thanks -
>     
>     
>Jim Patterson
>Ontario Power Generation (formerly Ontario Hydro) 
>Radiation Protection Department - Pickering Nuclear 
>Health Physics Section
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