RE: human-human K-40 dose- Reduction due to shielding of

["Heinmiller, Bruce" <heinmillerb@aecl.ca>]

So much for my feeling that the shielding effect would be small.  Although I
think there's some dependency on background level, separation distance and
target size, I don't think it's dependent enough to swing it the other way
(in relative terms).  I think you've put the final nail in the coffin on
this one, Dan.

Bruce Heinmiller CHP
heinmillerb@aecl.ca

> ----------
> From: 	Strom, Daniel J[SMTP:daniel.j.strom@pnl.gov]
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Wednesday, December 08, 1999 7:05 PM
> To: 	Multiple recipients of list
> Subject: 	Re: human-human K-40 dose- Reduction due to shielding of
> 
> RADSAFERs,
> 
> It is easy to measure waterbed shielding using a Reuter-Stokes RSS-111
> high-pressure ion chamber.  I have data (which I've been meaning to
> publish for
> a decade) from a brick house in Pittsburgh:
> 
> 2nd floor on floor: ~10.0 uR/h
> 2nd floor ordinary bed: ~ 10.0 uR/h
> 2nd floor water bed, ca. 25 cm thick: ~ 8. uR/h
> 2nd floor water bed with person lying next to ion chamber: ~ 7.5 uR/h
> 2nd floor water bed with persons lying on either side of ion chamber: ~
> 7.0 uR/h
> 
> K-40 is irrelevant; shielding of terrestrial radiation by lots of water
> is.
> 
> - Dan Strom
> 
> The opinions expressed above, if any, are mine alone and have not been
> reviewed
> or approved by Battelle, the Pacific Northwest National Laboratory, or the
> U.S.
> Department of Energy.
> 
> Daniel J. Strom, Ph.D., CHP
> Risk Analysis & Health Protection Group, Environmental Technology
> Division,
> Pacific Northwest National Laboratory
> Mail Stop K3-56, PO BOX 999, Richland, Washington 99352-0999 USA
> Telephone (509) 375-2626 FAX (509) 375-2019 mailto:daniel.j.strom@pnl.gov
> Brief Resume: http://www.pnl.gov/bayesian/strom/strombio.htm
> Pagemaster for  http://www.pnl.gov/bayesian   http://qecc.pnl.gov
> http://bidug.pnl.gov
> 
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