Re: High Contamination -Reply

[David.Richards@rfets.gov (David Richards)]

     I agree with Doug that strip coat is an excellent option. It is also 
     incinerable which provides more disposal options. Personally, I prefer 
     and recommend the original Imperial Coatings ALARA 1146 type (now 
     available through Carboline) rather than the Bartlett TLC simpler 
     because it goes on thicker and is subsequently easier to remove.
     
     One great thing about strip coat that many folks don't take advantage 
     of is that you can apply it and leave it in place to fix the contamination 
     while work is going on. This is assuming of course, that your gamma dose 
     from the contamination doesn't present a problem. In that case you can 
     apply and remove once, then apply a second time and leave until the work is 
     completed. It works great for controlling airborne and the thicker type 
     also provides a pretty good reduction in beta dose rates. (The beta from 
     the indicated fuel problems may not be as easily shielded, though.)
     
     PS: Hey Doug! How goes it?
     
     DJ Richards
     EP Hazards Assessment Team Leader
     Rocky Flats Environmental Technology Site
     Excalibur Associates, Inc.
     David.Richards@rfets.gov
     djrichards@rmac.net
     
     
     
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     Subject: High Contamination -Reply
     Author:  "DOUGLAS W. TURNER" <TURNEDW%GWSMTP.NU.COM@inet.rfets.gov> at inet
     Date:    5/5/98 11:59 AM
     
     
     I would suggest strippable paint.  Hydrolasing will blow the contamination 
     all over the drywell and you will have to protect water sensitive 
     equipment. Strippable paint should also result in the smallest volume of 
     radwaste, is easy to apply and easy to remove.  Some strippable coating 
     have been prequalified for use in reactor vessels and therefore should be 
     OK for recirc piping.