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RE: Treatment of Contaminated Personnel

To: radsafe@romulus.ehs.uiuc.edu
Subject: RE: Treatment of Contaminated Personnel
From: "J. J. Rozental" <josrozen@netmedia.net.il>
Date: Tue, 2 Mar 1999 21:43:50 +0200 (IST)
In Goiania we work with very variable temperature, and often rainwater. The
IAEA document STI/PUB/815, 1988 has an annex which describes the  experience
on performance of dose rate and of  contamination monitors. The Health
Physiscs Special Issue - The Goiania Radiation Accident, Vol 60- 1, January
1991 has a Chapter on Instrumentation and Monitoring, page 77/80 " Guidance
for Selecting Nuclear Intrumentation Derived from Experience in the Goiania
Accident"
To cement the remnant source of Cs-137 I used the Teletector Rotem (Israel)
range 1,000 R/h.

J. J. Rozental
<josrozen@netmedia.net.il>
Israel




At 10:18 AM 3/2/99 -0600, you wrote:
>As I recall, and these are my opinions only, the RO-7 has an extended cable,
>while the Teletector has a 13 ft extension probe. Considering the question
>of radiography sources, the extended probe (I assume Ludlum's is an
>equivalent design) would be the wiser choice.
>Jack
>
>	-----Original Message-----
>	From:	James.P.Revels%ucm.com@inet.rfets.gov
>[SMTP:James.P.Revels%ucm.com@inet.rfets.gov]
>	Sent:	Tuesday, March 02, 1999 9:09 AM
>	To:	Multiple recipients of list
>	Subject:	RE: Treatment of Contaminated Personnel
>
>	The Teletectors are limited to 1000 R/hr.  The Ro-7 is one of the
>only
>	portable instruments that will measure dose rates up to 20 kR/hr
>
>	> -----Original Message-----
>	> From:	Laning, Eric [SMTP:ejlaning@bechtel.com]
>	> Sent:	Tuesday, March 02, 1999 9:53 AM
>	> To:	Multiple recipients of list
>	> Subject:	RE: Treatment of Contaminated Personnel
>	> 
>	> Eberline used to also market  an extended probe dose rate
>instrument named
>	> a
>	> teletector which as I recall had ability to see >
>1000R/hr...Ludlum also
>	> makes a similar instrument, Model 77-3 Stretch scope. 
>	>  
>	> These are my comments/opinions and mine alone. 
>	> 
>	> EJ Laning
>	> ejlaning@bechtel.com
>	> > -----Original Message-----
>	> > From:	David.S.Villicana@ucm.com
>[SMTP:David.S.Villicana@ucm.com]
>	> > Sent:	Tuesday, March 02, 1999 9:30 AM
>	> > To:	Multiple recipients of list
>	> > Subject:	RE: Treatment of Contaminated Personnel
>	> > 
>	> > The difficulty is: there is no instrument to measure dose rates
>>1000
>	> R/h.
>	> > Since the value is unknown, you cannot estimate a stay time. In
>an
>	> > official
>	> > procedure, I think the advice should be: if your instrument is
>off
>	> scale,
>	> > back away.
>	> > 
>	> > An RO 7 made by Eberline with its High Range detector could be
>used.
>	> > The range is 19.9krem/hr and the resolution is 10 rem/hr.
>	> > The instrument is normally used for under water work but could
>easily be
>	> > used for this type of work.
>	> > Thanks
>	> > David Villicana
>	> > David.S.Villicana@ucm.com
>	> > 
>	> > > -----Original Message-----
>	> > > From:	Mike McNaughton [SMTP:MCNAUGHT@lanl.gov]
>	> > > Sent:	Sunday, February 28, 1999 4:16 AM
>	> > > To:	Multiple recipients of list
>	> > > Subject:	Re: Treatment of Contaminated Personnel
>	> > > 
>	> > > >d) Now let's take into account  the following  remark: If the
>dose
>	> rate
>	> > > is
>	> > > >>1000 R/h, back off and do not perform a rescue.
>	> > > 
>	> > > Note: the "greater than" symbol is confused with the ">"
>symbol added
>	> by
>	> > > the email program. This should read: >1000 R/h. If the dose
>rate
>	> equals
>	> > > 1000 R/h, I agree with the following analysis.
>	> > > 
>	> > > >This value is a dose rate and should consider the time
>necessary for
>	> > the
>	> > > >rescue. In case of the ICRP and IAEA recommendations, if the
>total
>	> > > effective
>	> > > >dose considered for life saving is 500 mSv (50 R), and
>considering
>	> a
>	> > > >scenario that the dose rate is 1000 R/h,  this means that the
>time
>	> for
>	> > > >rescue should be not more than  3 minutes. It is really a
>very high
>	> > > balance
>	> > > >for decision making.  
>	> > > 
>	> > > The difficulty is: there is no instrument to measure dose
>rates >1000
>	> > R/h.
>	> > > Since the value is unknown, you cannot estimate a stay time.
>In an
>	> > > official
>	> > > procedure, I think the advice should be: if your instrument is
>off
>	> > scale,
>	> > > back away.
>	> > > 
>	> > > In reality, perhaps a volunteer would perform a rescue anyway.
>Which
>	> > leads
>	> > > to the following.
>	> > > 
>	> > > In some existing training (not in Los Alamos) the official
>advice is:
>	> if
>	> > > you measure ANY radiation, wait for the knowledgeable
>authorities.
>	> This
>	> > > official advice is followed during exercises and drills. I am
>told: in
>	> a
>	> > > real situation where life is at risk, we would do it
>differently. How
>	> > > strange!
>	> > > 
>	> > > >"Aspects of
>	> > > >the Initial and Recovery phases of the Radiological Accident
>in
>	> > Goiania,
>	> > > >Brazil",  Proceedings of the International Symposium on
>Recovery
>	> > > Operations
>	> > > >in the Event of a Nuclear Accident or Radiological Emergency
>- IAEA,
>	> > > Vienna,
>	> > > >6-10 November 1989. If you which a copy please give me your
>complete
>	> > > >address and I will send to you.
>	> > > 
>	> > > Yes, I would very much like a copy. Please send to:
>	> > > Dr M. McNaughton
>	> > > J596
>	> > > Los Alamos, NM 87545, USA
>	> > > 
>	> > > Thank you for your helpful comments. mike
>	> > > 
>	> > > "Shlala gashle" (Zulu greeting meaning "stay safe") mike
>	> > >
>	>
>************************************************************************
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>subscription
>	information can be accessed at
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>information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html
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>
jjrozental

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