Re: A real solution

["John R Johnson" <idias@interchange.ubc.ca>]

I have not see that graph, but the fraction of ingested (Class F) Pu and U
that gets to blood is 0.005 and 0.04 respectively. Also, U will be more
mobile in ground water than Pu.

John R Johnson
4535 West 9-th Ave
Vancouver BC
(604) 222-9840
e:mail idias@interchange.ubc.ca

----- Original Message -----
From: Michael McNaughton <mcnaught@lanl.gov>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Sent: Friday, August 18, 2000 2:34 PM
Subject: Re: A real solution


> At 02:54 PM 8/18/00 -0500, you wrote:
> >Some years ago I was told by someone whose opinions I respect that the
> >oft-used 10,000 year worry period is way off and that spent fuel will
decay
> >to being no more radioactive than the original unirradiated fuel in about
> >300 years.
>
> I have seen this presented as a graph, but with essentially no
> justification, no references, and no technical details. The graph is
> "ingestion toxicity" versus time; Pu is assigned a low ingestion toxicity
> because it is insoluble. After almost 1000 years, the total ingestion
> toxicity of the high-level waste from a LWR is shown as less than the
total
> ingestion toxicity of the original uranium ore used to make that fuel.
Many
> years ago I tried and failed to find the origin of the graph so I could
> check the details.
>
> mike
>
> Mike McNaughton
> email: mcnaught@LANL.gov or mcnaughton@LANL.gov
> phone: (505)667-6130
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