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Re: some details on St. Lucie
"I do not understand how individuals working in an
environment of radioactivity are expected to receive zero dose."
This is not correct, by the simple reason that every individual working in
an environment of radioactivity needs to be trained accordingly and to
receive information on the health risks due to their occupational exposure,
whether normal exposure or potential exposure and also to receive adequate
information on the significance for protection and safety of his/her
actions.
Individuals can discuss many silly subjects on radiation safety, however
never to admit (not your case, as I understood) that are individuals working
in an environment of radioactivity expecting to receive zero dose.
Jose Julio Rozental
joseroze@netvision.net.il
Israel
----- Original Message -----
From: Mitchell Davis <radiation@cox.net>
To: Michael G. Stabin <michael.g.stabin@vanderbilt.edu>; radsafe
<radsafe@list.vanderbilt.edu>
Sent: Thursday, October 17, 2002 1:26 AM
Subject: Re: some details on St. Lucie
I do not understand how individuals working in an
environment of radioactivity are expected to receive zero dose. It is going
to happen!!! That is part of the "risk" in employment in this industry. To
not have exposure would be like saying a welder should not be exposed to the
brightness of the weld field as he/she completes a weld field. When are we
as professionals going to stop this madness by simply admitting that there
are risks associated with this profession? Anybody want to be a fisherman
in Alaska?
Mitchell W. Davis, RRPT
Health Physicist
915-697-3523
915-349-4824 Cell
radiation@cox.net
----- Original Message -----
From: Michael G. Stabin <michael.g.stabin@vanderbilt.edu>
To: radsafe <radsafe@list.vanderbilt.edu>
Sent: Wednesday, October 16, 2002 8:18 AM
Subject: some details on St. Lucie
>
> I have some details about the St. Lucie exposures, from a colleague who
> works there (Pete Bailey). He describes the exercise of the dose followup
as
> "MegaCalcs of FemtoDose", which I think describes a lot of HP work,
> reminiscent of "Atom Man", pictured in an HP newsletter some years ago as
a
> little guy with a butterfly net chasing an individual radioactive atom.
>
> (all comments with the ">" are from Mr. Bailey)
>
> > There was no "release" of activity in the emergency planning sense.
> > It all stayed in the containment . . .
> >
> > Within the containment, there was a task to clean the reactor head
> > in preparation for visual inspection.
> >
> > The cleaning occurred 'down ' in the refueling cavity,
> > about 40 feet below the operating deck.
> >
> > We knew the cleaning area could become 'airborne' ; that is,
> > the cleaning process could move some of the radiactive material into the
> > air.
> >
> > The people 'down there' doing the cleaning were wearing respirators, in
> addition to
> > the anit-contamination clothing, plastic 'rainsuits', boots, etc.
> >
> > People in other locations of the containment building were wearing
> > the standard anti-contamination clothing. Their jobs did not require
> > respirators. Most of the jobs were on the operating deck.
> >
> > The cleaning process generated more 'airborne' than was anticipated.
> >
> > The 'airborne' activity was moved by fans ( for cooling equipment &
> people )
> > to many locations within the containment.
> >
> > Some , not all, of the 'other' ( non-cleaning crew ) people inhaled
some
> of this
> > cloud as the left the containment.
> >
> > I've been very ( very very ) involved with the dose assessment of the
> > event.
> >
> > For all those people that had a measureable intake, the highest whole
body
> dose
> > is about 21 millirem. This is about 0.4% (four-tenths of one percent)
of
> the
> > annual limit for radiation workers.
>
> (Stabin's note) - applying the BERT concept, this highest value is
> equivalent to the dose that these workers would have received in about 25
> days of exposure to natural background radiation.
>
>
> Michael G. Stabin, PhD, CHP
> Assistant Professor of Radiology and Radiological Sciences
> Department of Radiology and Radiological Sciences
> Vanderbilt University
> 1161 21st Avenue South
> Nashville, TN 37232-2675
> Phone (615) 343-0068
> Fax (615) 322-3764
> e-mail michael.g.stabin@vanderbilt.edu
> internet www.doseinfo-radar.com
>
>
>
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