Concrete Demolition

["TED S. BOHN" <BST@inel.gov>]

      Radiological Engineering (bst@inel.gov)
      6-1279  MS 4138  FAX 6-8959  Pager 5841
Kurt, you might want to checkout the Dustless Decon System (DDS) manufactured
by Pentek, Inc. of Coraopolis, PA.  The system costs about $36,000. The unit
was evaluated by Michael Simmons of Rocky Flats 4/8/93.  The system
is comprised of three components: a manually controlled piston device known as
a scrabbler, a manually controlled needle gun, and a vacuum system.  The
scrabbler is used in large-scale decontamination operations that involve
pulverization of coated floor and concrete substrates. Please notify me if
if you want further information.

*** Reply to note of 07/17/96 09:03

From: Kurt Geber
To: RADSAFE --INELMAIL RADSAFE

Subject: Concrete Demolition
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