False alarms on DMC model 90 electronic dosimeters

["Leamon, John A." <jaleamon@tva.gov>]

Does anyone out there, especially those of you working at a plant site, have
practical experience dealing with false alarms on Merlin Gerin Model 90
electronic dosimeters.  We are using these dosimeters with the Merlin Gerin
LDM101 reader with 549C firmware and Windows 95 based HIS20 Access Control
software.  

Several times each day, a small percentage of workers are exiting the RCA
where known and confirmed radiation levels are less than 5 mrem/hour but the
ED indicates a much, much higher value (sometimes in the hundreds or
thousands of mrem/hour).  Needless to say, this is quite disturbing to the
Rad workers, the Radcon staff, and other interested parties.  

We have been struggling with this issue for a month without success.  Any
good ideas are appreciated to help get this behind opportunity behind us and
move on to more worthwhile efforts.

Contact me, John A. Leamon, at 423-751-7038 or email at jaleamon@tva.gov

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