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RE: Chemical state of Ir-192 sources
I sent this information to Radsafe, and you can find it at
http://www.vanderbilt.edu/radsafe/0202/msg00161.html
In this case the damage was in the immediate area, not member of the public
was involved, only workers.
Jose Julio Rozental
jrozental@hotmail.com
Madrid, until 02-October-2002
>From: Sonter Mark <sonterm@EPA.NSW.GOV.AU>
>Reply-To: Sonter Mark <sonterm@EPA.NSW.GOV.AU>
>To: "'Carol S. Marcus'" <csmarcus@ucla.edu>, radsafe@list.vanderbilt.edu
>Subject: RE: Chemical state of Ir-192 sources
>Date: Mon, 9 Sep 2002 09:00:49 +1000
>
>Carol,
>
>You should go back thru the radsafe archives and look up the details of the
>Ir-192 dispersion that occurred in Louisiana some months back, during
>industrial radiography at an oil refinery, I think it was. The workers
>involved got whole body scans at a local nuclear power plant, from
>memory.... If you talk to the people who were involved I'm sure you will
>get
>some useful info...
>
>Mark Sonter
>Radiation Control Section
>NSW Environmental Protection Authority
>Fax +61 2 9995 6603
>Phone +61 2 9995 5974
>
>
> -----Original Message-----
> From: Carol S. Marcus [SMTP:csmarcus@ucla.edu]
> Sent: Saturday, 7 September 2002 8:14
> To: radsafe@list.vanderbilt.edu
> Subject: Chemical state of Ir-192 sources
>
> Dear Radsafers:
>
> I am interested in knowing the chemical state of Ir-192 in sealed
>sources,
> and any thoughts on what would happen chemically to the Ir-192 if it
>was
> exploded as a radiologic dispersion device. I am trying to estimate
>
> biodistribution and kinetics if such Ir-192 were to be inhaled,
>ingested,
> or introduced traumatically (e.g. contaminated shrapnel). Anyone
>having
> any information on biodistribution and kinetics is requested to
>share it
> with me.
>
> The California Statewide Medical and Health Disaster Exercise on Nov
>14th
> includes an Ir-192 RDD scenario, and I have been asked to critique
>our
> Exercise Guidebook. Ir-192 in an RDD is a reasonable scenario, and
>I need
> to know this anyway.
>
> If, for example, the Ir-192 is chemically just solid metal, and some
>of it
> is converted to insoluble oxide in the explosion, then we would
>worry about
> pulmonary and pulmonary lymph node deposition. Little would ionize
>and get
> into the blood and other organs. Ingested Ir-192 would just pass
> through. If, on the other hand, much of it were to be in a soluble
>form,
> the biodistribution and kinetics would be entirely different.
>
> Many thanks for any help you can give me.
>
> Ciao, Carol
>
> Carol S. Marcus, Ph.D., M.D.
> <csmarcus@ucla.edu>
>
>
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