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AW: AW: request for help with Wikipedia article
Franz Schoenhofer
PhD, MR iR
Habicherg. 31/7
A-1160 Vienna
AUSTRIA
phone -43-0699-1168-1319
-----Ursprüngliche Nachricht-----
Von: Nathan Russell [mailto:windrunner@gmail.com]
Gesendet: Freitag, 27. August 2004 15:57
An: Michael McNaughton
Cc: Stewart Farber; John Sebastian; radsafe@list.vanderbilt.edu;
franz.schoenhofer@chello.at
Betreff: Re: AW: request for help with Wikipedia article
On Fri, 27 Aug 2004 07:28:34 -0600, Michael McNaughton
<mcnaught@lanl.gov> wrote:
> At 04:34 PM 08/26/2004, Stewart Farber wrote:
> >Anyone have good numbers on total Sr-90 vs. Cs-137 releases?
>
> I have several reports at hand, including UNSCEAR-2000. All agree
(within
> about 10%) on the following numbers.
> stronium-90 release = 8 PBq;
> cesium-137 release = 80 PBq.
>
Sounds great, thanks.
Would anyone object, then, if I were to make the article list the
present-day activity as 55-65 - to include all others that may have
survived in quantity, dispersed Pu, etc? 18/30 (years) is .6, and
[(1/2)^.6]*88 is just a tad over 58.
------------------------------------------------------
Nathan,
>From the radiation protection point of view the amounts of various
radionuclides cannot simply be added, as well as radionuclides which
have now decayed cannot be neglected - for instance I-131, which decayed
very quickly with a half-life of appr. 8 days, was of very great
importance in the first weeks after the accident. Sr-90 behaves totally
different from Cs-137 in the environment and so does plutonium. (We have
a saying in German, "One cannot sum up apples and pears.") Therefore the
only scientifically justified approach is to give numbers at the time of
the release, how much of it is left is because of the wide spread
dependent on the local concentrations and not related to the initial
emission.
Franz
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