Re: Lead shielding installation techniques

[maj_louie_tonry@ddeamc.smtplink.amedd.army.mil]

     Although this may not be the right answer, I wonder what the shielding 
     comparison would be between a 32nd or 16th inch of lead to a 2 inch 
     steel or aluminum screw.
     
     Presumably for a typical shielding installation in a diagnostic room, 
     the lead is part of the sheet rock.  It is mounted using standard 
     techniques - ie. screwing the sheet rock to the studs.  The fastener 
     is a 2" drywall screw made of steel or aluminum.  The hole in the 
     sheet rock lead is filled with the screw.
     
     Does this compromise the shielding??  I think it probably doesn't.
     
     Louie Tonry
     
          
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     + LOUIE TONRY, CHP                                                   + 
     + MAJOR, MS                                                          + 
     + Chief, Radiation Protection Division                               + 
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______________________________ Reply Separator _________________________________
Subject: Lead shielding installation techniques 
Author:  <radsafe@romulus.ehs.uiuc.edu > at Internet-Mail
Date:    3/8/99 11:51 AM


This question may have arisen previously on RADSAFE.
     
I am interested in hearing about current techniques for installing lead 
shielding and/or drywall in diagnostic x-ray facilities. I am particularly 
interested in fastening techniques that may involve the penetration of the 
sheeting material; specifically, how is the possibility of pin hole 
radiation leaks around the fasteners avoided?
     
Thank-you in advance for your assistance!
     
**************************************************************
     
Eric Cowdrey
Radiation Protection Officer
Department of Medical Physics
Manitoba Cancer Treatment and Research Foundation 
100 Olivia Street
Winnipeg, Manitoba    R3E 0V9
CANADA
     
Tel (204) 787-2166
Fax (204) 775-1684
e-mail ericc@mctrf.mb.ca
     
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