RE: Re[2]: Liquid waste tank decommissioning!

["Neil, David M" <neildm@id.doe.gov>]

This probably wouldn't be feasible for an underground tank.  The grout
gives it a density comparable to soil, but with the urethane foam, the
tank would 'float' up out of the ground over time.  Even the grout is no
guarantee that this won't happen - ask any farmer whose field 'grows'
rocks.  It's a function of the freeze-thaw cycle and the physical
properties of loose mixed aggregates (the same ones which bring the
Brazil nuts to the top of the can in shipping).

Dave Neil
neildm@id.doe.gov

On Wednesday, February 03, 1999 1:23 PM, Jim Dunlap
[SMTP:jim.dunlap@guardian.brooks.af.mil] wrote:
>      Another option is polyurathane foam.  It set up as a light-weight

>      solid.  Great for gloveboxes that need to be retired.
>      
>      jim.dunlap@guardian.brooks.af.mil
>      
> 
> 
> ______________________________ Reply Separator
_________________________________
> Subject: RE: Liquid waste tank decommissioning!
> Author:  radsafe@romulus.ehs.uiuc.edu at guardian
> Date:    2/3/99 1:03 PM
> 
> 
> Another option that was used at ORNL was grouting in place. The tank
was
> just filled with a low-density grout mixture and all aboveground
> penetrations were cut off to below ground, then the tank was filled
over. If
> you don't HAVE to remove the tank, it's another option.
> 
> DJ Richards
> Hazards Assessment & Y2k Emergency Preparedness Lead
> Rocky Flats Environmental Technology Site
> David.Richards@rfets.gov
> djrichards@earthlink.net
> 
> 
> 
> > -----Original Message-----
> > From: Joe Christy [SMTP:jchristy%SLAC.Stanford.EDU@inet.rfets.gov]
> > Sent: Wednesday, February 03, 1999 11:44 AM
> > To: Multiple recipients of list
> > Subject: Re: Liquid waste tank decommissioning!
> > 
> > At 09:10 AM 2/3/99 -0600, you wrote:
> > >Hello!
> > >
> > >What is the procedure for putting liquid radioactive waste tanks
out of
> > >service? What I mean is if we were to replace an old tank with a
new
> > tank,
> > >how do we go about getting rid of the old one ( if we have some
trace
> > >amounts of radioactivity still present)
> > >Any suggestions or comments are appreciated.
> > >
> > >Thank you.
> > >
> > >Latha Vasudevan 
> > -------------------
> > Latha:
> >              
> > Depending upon the size, configuration, and components of the tank
(and
> > the
> > amount of radioactivity remaining in the tank), some of the options
that
> > you may want to explore are:
> > 
> > 1. Decontaminate the tank for free release.
> > 2. Use the tank as a "strong tight" container for the
transport/disposal
> > of
> > LSA and/or SCO radioactive material [see 49 CFR 173.427(b)].
> > 3. Recycle the tank through metal melting at:
> >  GTS Duratek
> >  Bear Creek Operations
> >  P.O. Box 2530
> >  1560 Bear Creek Rd.
> >  Oak Ridge, TN 37831-2530
> >  Customer Service: 800-663-2966
> > 
> > (For more info on GTS, visit their website at:
> > <http://www.gtsduratek.com/>)
> > 
> > Joe Christy
> > E-mail: jchristy@slac.stanford.edu
> >
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