RE: Is Two Too Many?

[Glen.Vickers@ucm.com]

The phrase, "All the time" with respect to wearing two dosimeters is more
conservative than the current use in commercial nuclear power.  Workers at
power plants typically only use a second dosimeter when they are entering a
"radiologically posted area" or as dictated by their radiation work permit.

This would be such and inconvenience, a business case might say wear two TLD
badges all the time and only use an electronic dosimeter when entering
radiologically posted areas.  Most of the personnel on site don't enter
radiologically posted areas on a daily basis and requiring everyone to
electronically log out an electronic dosimeter at the beginning of the day
and return it at the end of the day to record dose would be a significant
inconvenience.  

Realistically, with the typical minimum recordable dose levels by most
electronic dosimeters, you'd probably want personnel outside of posted areas
to keep the dosimeter turned on all of the time for a monitoring period of
significant length or else you'd be spending a lot of money collecting
zeros.  This type of use would be a bit of a stretch for typical electronic
dosimeters.

Glen Vickers
glen.vickers@ucm.com

> -----Original Message-----
> From:	Goff, Tom [SMTP:gofft@wipp.carlsbad.nm.us]
> Sent:	Monday, June 05, 2000 4:11 PM
> To:	Multiple recipients of list
> Subject:	RE: Is Two Too Many?
> 
> I think the phrase that is most upsetting is "All the time".  In fact the
> true meaning of this is that you should wear 2 dosimeters whenever in an
> area where you could be exposed to radiation.  The second dosimeter is
> usually direct reading and the summary of all the direct readings can be
> used if the primary dosimeter is lost or damaged.  This is true even if
> the
> primary dosimeter is an electronic personnel dosimeter.  I'm surprised
> Sandy
> Perle and/or Mike Lantz are not responding to this.
> 
> Tom Goff
> WIPP Radiological Engineering
> (505) 234-8861
> (fax)  234-6027
> e-mail  GoffT@WIPP.Carlsbad.NM.US
> page (505) 234-8850  (pager 479)
> P.O. Box 2078
> Carlsbad, NM 88221
> Radiological Engineering:  Anticipating Radiological Problems   Developing
> Techniques to Deal with Them
> 
> -----Original Message-----
> From: Dick Granberg [mailto:dgranber@net-link.net]
> Sent: Monday, June 05, 2000 2:38 PM
> To: Multiple recipients of list
> Subject: Re: Is Two Too Many?
> 
> 
> 
> Mike Fuller asked:
> On May 25, 2000, American Nuclear Insurers revised its External
> > Dosimetry Criteria recommending that insureds place
> >
> > TWO DOSIMETERS ON EVERONE LIKELY TO EXCEED 100MREM PER YEAR - ALL THE
> > TIME.
> >
> > One dosimeter is called the Dosimeter of Legal Record (DLR) - a NAVLP
> > Device.  The other is called a backup dosimeter - perhaps an SRPD.
> >
> > Their purpose is to establish and air tight defense in any personal
> > injury case that might arise our of a person's expsoure to radiation.
> >
> >  My question is:  Is anyone out there already doing this?
> 
> Mike;
> 
> I believe that, among other facilities, essentially every nuclear power
> plant in the U.S. already meets this criterion, or at least something very
> close.
> 
> Dick Granberg
> AEP/ D.C. Cook Nuclear Plant
> rdgranberg@aep.com
> 
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