[ RadSafe ] Re: Electronic dosimeter as dose of record

[Flood, John]

Some outfits see a cost savings.  Programs that historically used both
primary and secondary dosimetry (TLD supplemented by a DRD or ED) asked why
pay for 2 systems if one will do.  If the ED measures the same quantities
and does so adequately, the answer seemed obvious.

The issues that they ran into were significant.  First, ANI was none too
happy about dropping the TLD because they didn't see the ED as a viable
replacement.  Second, they REALLY didn't like the idea of giving up
secondary dosimetry - dropping the TLD means the measurement has no backup.
ANI went so far as to tell its customers that they would raise premiums for
anyone dropping TLDs and going to EDs exclusively.  Many internal legal
offices also came to the same conclusions.

There's another issue for programs that use EDs as shared dosimeters - the
wearer issues himself/herself an ED at the RCA entrance and turns it back in
when exiting.  This allows the company to maintain an inventory adequate to
monitor the maximum number of people in the RCA rather than one for every
person in the program.  This leads to an administrative problem.  As an
electronic instrument, it falls under the long-standing practice that says,
if the device fails its as-found calibration, all measurements made with the
device shall be evaluated for validity and appropriate corrections made
where warranted.  For use of an ED during a refueling outage at a power
reactor, that could be tens of thousands of uses by hundreds to thousands of
different individuals.  A monumental problem.  And solving it by acquiring
an inventory to assign one ED permanently to each person defeats the cost
savings they were after to begin with.

Bob Flood
Nevada Test Site


-----Original Message-----
From: Efforrer at aol.com [mailto:Efforrer at aol.com] 
Sent: Tuesday, March 08, 2005 4:09 PM
To: sandyfl at earthlink.net; radsafe at radlab.nl
Subject: RE: [ RadSafe ] Re: Electronic dosimeter as dose of record

I guess my question would be this...Would you want to trust ED's or PICs for
your dose record?
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