Fwd: RE: TLD badge dose

[John Jacobus <crispy_bird@YAHOO.COM>]

--- John Jacobus <crispy_bird@yahoo.com> wrote:

> Date: Fri, 9 Jan 2004 12:16:06 -0800 (PST)

> From: John Jacobus <crispy_bird@yahoo.com>

> Subject: RE: TLD badge dose

> To: "Flanigan, Floyd" <Floyd.Flanigan@nmcco.com>, 

>     Wes Van Pelt <WesVanPelt@att.net>, David Hornsey

> <bssdjh@BATH.AC.UK>, 

>     radsafe@list.vanderbilt.edu

> 

> Were these pocket dosimeters calibrated for the

> x-ray

> spectrum associated with baggage scanning units,

> e.g.,

> 120 keV max photons and low filtration?

> 

> --- "Flanigan, Floyd" <Floyd.Flanigan@nmcco.com>

> wrote:

> > Last week I ran a bunch of direct reading

> "pencils"

> > through the x-ray machine at the security check

> > point and checked them for accrued dose. 2 mRem

> was

> > the average between 60 "pencils".

> >  

> > Hope it helps.

> >  

> > Floyd W. Flanigan B.S.Nuc.H.P.

> > 

> > -----Original Message-----

> > From: Wes Van Pelt [mailto:WesVanPelt@att.net]

> > Sent: Friday, January 09, 2004 10:26 AM

> > To: 'David Hornsey'; radsafe@list.vanderbilt.edu

> > Subject: RE: TLD badge dose

> > 

> > 

> > 

> > David and Radsafers,

> > 

> >  

> > 

> > In my experience, a normal x-ray scan of carry-on

> > baggage would give the luggage a dose of about 0.1

> > mrad (0.001 mSv). So a dose of 0.14 mSv seems MUCH

> > too high for routine luggage scans, even if the

> > luggage were scanned several times.

> > 

> >  

> > 

> > Regards,

> > 

> > Wes

> > 

> > Wesley R. Van Pelt, PhD, CIH, CHP

> > 

> > Wesley R. Van Pelt Associates, Inc.

> > 

> >  

> > 

> >  

> > 

> >    Good morning Radsafe,

> > 

> >  

> > 

> >        An X-ray thickness gauge manufacturing

> > company I work for in the UK

> > 

> > sent three engineers to San Diego for training on

> a

> > particular rig. All took

> > 

> > the TLD badges they were issued with here.

> > Unfortunately the Company they

> > 

> > were working with in San Diego did not issue them

> > with local monitoring.

> > 

> > They all carried out similar work whilst in the

> > States, but one of them came

> > 

> > back with a badge reading of 1.4 mSv. 

> > 

> > .....

> > 

> >        So - is such a dose feasible for suitcase

> > surveillance or could

> > 

> > anything in the baggage compartment of a 'plane

> > result in an actual dose or

> > 

> > an artefact? Obviously not a real problem

> dose-wise

> > unless it continues to

> > 

> > show up on his badges, but any thoughts would be

> > most welcome to satisfy

> > 

> > both his and my curiosity.

> > 

> >  

> > 

> >   David Hornsey

> > 

> >  

> > 

> > Radiation Safety

> > 

> > South Building Annexe

> > 

> > University of Bath

> > 

> > Bath BA2 7AY

> > 

> > 01225 386540

> > 

> > e-mail:bssdjh@bath.ac.uk

> > 

> >  

> > 

> >

>

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> > 

> 

> 

> =====

> +++++++++++++++++++

> "There's no trick to being a humorist when you have

> the whole government working for you."

> Will Rogers

> 

> -- John

> John Jacobus, MS

> Certified Health Physicist

> e-mail:  crispy_bird@yahoo.com

> 

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=====

+++++++++++++++++++

"There's no trick to being a humorist when you have the whole government working for you."

Will Rogers



-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com



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