FW: Radium dial watches

["Michael Stabin" <michael.g.stabin@vanderbilt.edu>]

Date: Tue, 13 Nov 2001 17:09:20 -0800

From: "Feldman, Gerald" <gfeldman@MSX.NDC.MC.UCI.EDU>

Subject: FW: Radium dial watches



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Unless they made a special correction for you, the number reported by

Landauer may likely be an over-estimation of the actual dose.



Landauer's dosimeter films are calibrated to be used "IN THE HOLDER".  When

the film is used outside the holder (and exposed without the filters inside

the holder), the dose is adjusted inappropriately because it is given a

different energy correction factor (no filter pattern >>>must be high

energy).



Gerald Feldman

gfeldman@uci.edu





- -----Original Message-----

From: Johansen.Kjell [mailto:Kjell.Johansen@wepco.com]

Sent: Monday, November 12, 2001 9:35 AM

To: Radsafe (E-mail)

Subject: Radium dial watches







Many years ago, 1960 to be exact, I received an Omega watch for HS

graduation.  I wore it all the time except for showers, swimming, etc.

While at grad school at Michigan in the late 60s, I found it convient to use

the watch to check the NaI xtal for our gamma spectrometer.  I got curious

as to the dose to my left wrist and decided to run a test.  I visited the RP

office and told them what I would like to do and they supplied a film packet

for a film badge to measure the exposure. I wrapped the film is Al foil and

Saran wrap to protect it from light and moisture.  After one month the film

was sent in for processing.  The Landauer evaluation was contaminated, 1000

mrem.



Kjell Johansen

Environmental Specialist

Point Beach Nuclear Plant

kjell.johansen@wepco.com