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

["Strom, Daniel J" <daniel.j.strom@pnl.gov>]

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

************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html