Re: Concrete Demolition

[Doug Turner <turners@earthlink.net>]

Kurt,

Check with TMI (Joe Kuehn).  We were vacuuming concrete dust measuring
greater than 50 R/h from concrete removal directly into 55 gal 17H drums
remotely.  The lid of the drums was modified to drop the dust into the drum
and the vacuum source was a HEPA filtered fan unit ( I seem to remember
about 5000 cfm).  The unit worked very well and was reliable.  The design is
similar to a wood shop dust collection system.
Good Luck, Doug Turner  Email turners@earthlink.net

At 09:56 AM 7/17/96 -0500, you wrote:
>Does anybody in radsafe have experience controlling airborne contamination
>generated by an electric jack hammer?  We're planning to use a "Bosch
>electric breaker hammer" to decontaminate about 15 sq. ft. of Cs-137 and
>Sr-90 contaminated concrete inside a building.  Based on core sample results
>we're going to remove the top  1" from a 12" thick slab.  Of course we'll be
>using respitory protection, but we don't want spread contamination to the
>adjacent lesser contaminated areas so we want some engineered control for
>the dust. I really don't have time to experiment on clean concrete with
>various size HEPA vacs.  Any practical advice is appreciated.  Thanks in
>advance.
>
>
>**********************************************
>	Kurt R. Geber
>	Lockheed Martin Energy Research Corp.
>	Oak Ridge National Laboratory
>	P.O. Box 2008
>	Oak Ridge, TN  37831-6160
>
>	Internet:	kg1@ornl.gov
>	Phone:		423-574-0929
>	Fax:		423-241-2779
>	
>
>
>