RE: Treatment of Contaminated Personnel

[James.P.Revels@ucm.com]

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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information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html