RE: Panasonic UD-716 badge reader

["Goff, Tom" <gofft@wipp.carlsbad.nm.us>]

Mike,

Caught your e-mail.  Haven't seen you out there before.  Have you been
on rad safe long.

Stay in touch.


Tom Goff
WIPP Radiological Controls
gofft@WIPP.carlsbad.nm.us
(505) 234-8561
(fax) 234-8298


>----------
>From: 	Lantz, Michael W(Z59078)[SMTP:MLANTZ@apsc.com]
>Sent: 	Friday, May 09, 1997 10:45 AM
>To: 	Multiple recipients of list
>Subject: 	RE: Panasonic UD-716 badge reader
>
>I would agree with the previous responses to you about anomalous TLD 
>readings.  Mr. Volschenk noted a number of issues to evaluate.  I 
>would add that a microscopic review of the teflon bubble of the TLD 
>elements at 30 to 60 power is important.  The LiBO elements are 
>especially susceptible to damage from many chemicals, with water or 
>sweat being leading candidates.  Check the teflon bubble carefully for 
>clouding related to "washed" phosphor.  Occasionally, we find red and 
>blue threads on the anomalous elements and these can provide TL.
>
>As Mr. Volschenk alluded to, check the post anneal value against the 
>main peak in the glow curve.  The ratio is often very different than 
>radiation-induced TL ratios.
>
>
>-
>From: 	David Arnold[SMTP:cotteril@sghms.ac.uk]
>Sent: 	Friday, May 09, 1997 1:30 AM
>To: 	Multiple recipients of list
>Subject: 	Panasonic UD-716 badge reader
>
>Recently we have had a couple of false high dose readings. Readout of 
>the backup elements fails to confirm the doses and the wearers'
>of the badges confirm that they have done nothing out of the ordinary, 
>work wise.
>
>Has anyone out there had similar experiences of spurious dose
>readings?  Any comments/explanations welcome.
>
>Regards,
>
>Dave Arnold
>The Radiological Protection Centre
>St. George's Hospital
>London
>
>
>
>
>