[ RadSafe ] Pepto-Bismol

John R Johnson idias at interchange.ubc.ca
Wed Dec 13 11:41:24 CST 2006


That's true unless the Po-210 resulted from Ra-226 or Pb-210 that was
separated and concentrated from the U-238/U234.

John R Johnson, Ph.D.
President, IDIAS, Inc
4535 West 9-Th Ave
Vancouver B. C.
V6R 2E2
(604) 222-9840
idias at interchange.ubc.ca

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl]On
Behalf Of Otto Raabe
Sent: December 13, 2006 8:35 AM
To: Flanigan, Floyd; Robert Atkinson; radsafe at radlab.nl
Subject: RE: [ RadSafe ] Pepto-Bismol

At 06:04 AM 12/13/2006, Flanigan, Floyd wrote:
>When Litvinenko came to leave the Soviet Union, radiological monitoring
>was not exactly prolific in airports and ports of entry/egress. So let's
>say he had some items in his possession which were pretty severely
>contaminated with U-238. Being ex-KGB, this is not such a stretch.
"contaminated with U-238"?????  The specific activity of U-238 is too tiny
for this statement to be meaningful!

"Po-210 in-growth"??????? It would take many thousands of years for
significant in-growth of Po-210 in a sample of U-238, and the activity
level would be no higher than that of the puny activity of U-238.


Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754   FAX: (530) 758-6140
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