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Re: Natural Radioactive Isotopes in Diesel Exhaust
Private:
Franz Schoenhofer
Habicherg. 31/7
A-1160 Vienna, AUSTRIA
Phone: -43 699 11681319
e-mail: franz.schoenhofer@chello.at
Office:
MR Dr. Franz Schoenhofer
Federal Ministry for Agriculture, Forestry, Environment and Water Management
Dep. I/8U, Radiation Protection
Radetzkystr. 2
A-1031 Vienna, AUSTRIA
phone: +43-1-71100-4458
fax: +43-1-7122331
e-mail: franz.schoenhofer@bmu.gv.at
-----Ursprüngliche Nachricht-----
Von: Harold Kroninger <hkroninger@awod.com>
An: radsafe@list.vanderbilt.edu <radsafe@list.vanderbilt.edu>
Datum: Freitag, 04. Jänner 2002 20:29
Betreff: Natural Radioactive Isotopes in Diesel Exhaust
Does anyone have knowledge or lead me to information on any natural
occurring radioactive isotopes in diesel exhaust gas? I know coal and
natural gas has some but did not find any literature specifically on diesel
fuel.
Thank you. Harold.
Please feel free to email me at hkroninger@awod.com
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Coal contains traces of uranium, thorium and the daughter products and
together wish aerosols containing ash particles some of these can be
liberated and distributed in the vicinity of a coal fired power plant,
especially Pb-210 and Po-210. Natural gas contains some radon-222 and this
will be liberated during burning, but also radon progeny may plate out
during the handling of natural gas and give rise to enhanced external doses
from machinery like pumps or valves. When radon is stored underground in
caverns it usually picks up radon which is then delivered to the customers.
None of the above mentioned ways seem to me to be able to contribute to a
content of natural radioactive isotopes to Diesel fuel. Diesel fuel is
produced by distillation of crude oil and thus any NORM must be removed -
Rn-222 because it is volatile, radon daughters because they would remain in
the residue. C-14 and T have decayed a long time ago, so they will not be
present any more.
I do not know, which additives are used in Diesel, but it sure is not lead,
which might have been the origin of small traces of Pb-210.
>From the above said I would draw the conclusion, that in Diesel Exhaust no
NORM is to be expected.
Best regards,
Franz
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