Re: CO-2 decon

[Doug Turner <turners@earthlink.net>]

San Onofre NGS has used CO2 decon for tools, scaffold poles, etc.  They
purchased their own unit because it was relatively successful at removing
contamination and minimized radwaste generation.  Steve Enright was the
cognizant supervisor. I am unaware on any leaching problem.  At TMI-2 we
used abrasive liquid blasting because we had contamination levels on tools
and equipment on the order of hundreds of mr/hr, and CO2 was not aggressive
enough.

Good Luck,

Doug Turner <turners@earthlink.net>

 At 10:54 AM 10/3/96 -0500, you wrote:
>Has anyone had experience using CO-2 pellet decon systems
>to free release material for disposal or re-use?
>
>In particular I was wondering if you have had success releasing
>lead waste, tools or other items.  (Assume that the material is fairly
>old and been in storage a 10 years or more and highly contaminated.)
>
>Also, I would like to know if you have ever checked for contamination 
>"leaching" back out of the decontaminated items after a period of time, 
>(say a week or month later, whatever seems appropriate.)
>
>Thanks
>
>Rich Hazard
>
>hazardr@wv.doe.gov
>
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