RE: Help-stack monitoring for emergency

[Karin Gordon <KGordon@exchange.hsc.mb.ca>]

Check Out AWARE electronics - they sell small GM detectors, dirt-cheap, that
run off your computer (multiple detectors from one computer are possible)
via telephone wire connection, will collect data over preset time intervals,
and the included software gives a histogram readout of radiation dose level
over time for each detector.  

Aware's website: http://WWW.AW-EL.COM

You might want to ask them to recommend a GM probe sufficiently sensitive to
the 55 keV photon - they do have energy-compensated GM probes, but I'm not
sure of the bottom end of their photon energy detection range.  I think they
photon-energy response curves available for all their probes.

We've been pleased with the performance of these inexpensive little
detectors and appreciate the automated collection and readout of
fluctuations in radiation dose rate.

Karin Gordon
Radiation Safety Officer
Health Sciences Centre
GC-214, 820 Sherbrook Street
Winnipeg, 
Manitoba
Canada R3A 1R9

phone: (204) 787-2903
fax:      (204) 787-1313
e-mail:  KGordon@hsc.mb.ca


> ----------
> From: 	Chan-Hyeong Kim[SMTP:chkim@trinity.tamu.edu]
> Sent: 	Monday, November 29, 1999 11:58 AM
> To: 	Multiple recipients of list
> Subject: 	Help-stack monitoring for emergency
> 
> Dear Colleagues:
> 
> I always appreciate your help and valuable comments!  The Texas A&M
> University Nuclear Science Center is preparing to produce ~1000 Ci of
> Xe-125.  For this, it is necessary to monitor the dose rate at the stack
> for
> emergency.  It is found that ion chamber or GM tube is the best option for
> the dose rate at the stack (~5-200 mR/h range).  The problem is that we
> need
> to read the dose rate at a "distant" place (~20 feet from the detector).
> Do
> any of you have a good idea on this?  The other problem is that we can
> spend
> not so much, less than $3,000, on this.  I would appreciate your help.
> 
> Chan
> 
> ______________________
> Chan Hyeong Kim, Ph.D.
> Assistant Director
> Nuclear Science Center
> Texas A&M University System
> 1095 Nuclear Science Road
> College Station, TX 77843-3575
> Phone: 409-845-7551
> Fax: 409-862-2667
> 
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