[ RadSafe ] Re: Low background Shielding Material

[Dimiter Popoff]

A possible explanation might be one which I stumbled into
about 15 years ago when I was looking for a lead source
for shielding. I was told that the bricks in the industrial
ovens contain some 60Co put there intentionally so the
wall thinkness could be continuously monitored as it wears
out. (I was also told a story which must be several decades
old now how the lead of a village's old mosk turned out to
be handy... well I think they had it replaced not just
taken and got away with it anyway without too much minority
rights screams etc. :-) .

Dimiter

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Dimiter Popoff               Transgalactic Instruments

http://www.tgi-sci.com
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> From: "Vernig, Peter G." <Peter.Vernig at va.gov>
> To: <radsafe at radlab.nl>
> Subject: [ RadSafe ] Low background Shielding Material
> Date: Thu, 8 Jun 2006 09:08:50 -0600
> 
> Group,
> 
> I have heard many times that "Pre World War II battleship steel" is used
> for extremely low background shielding.  I had always wondered about
> that as it seemed that an infinitesimal amount of fallout would find its
> way into steel.  But then I heard another explanation that made more
> sense something to do with the fabrication process that apparently
> changed post WWII and involved a small amount of Co-60 I think.
> 
> Does anybody out there know what the explanation is?
> 
> Any opinions in this e-mail are solely those of the author, and are not
> represented as those of the VA Eastern Colorado HCS, the Dept. of
> Veterans Affairs, or the US Government.
> 
> Peter G. Vernig, Radiation Safety Officer, MS-115, VA Eastern Colorado
> Health Care System, 1055 Clermont St. Denver, CO 80220,
> peter.vernig at va.gov, Phone=3D 303.399.8020 x2447; Fax =3D 303.393.5026,
> alternate fax, 303.393.5248
> 
> "...whatever is true, whatever is noble, whatever is lovely, whatever is
> admirable, if anything is found to be excellent or praiseworthy, let
> your mind dwell on these things."
> 
> Paul of Tarsus
>