RE: Exposure from flight

["Jim Darrough" <darrough@engr.orst.edu>]

Hi John and fellow RadSafe'rs.



	I made the apparently poor assumption that when I said X-Ray, people knew

that I meant the conveyor and not the portal-style metal detector. The TLD's

that I carried on my person were taken out of my pocket, placed in a basket,

and run through the X-Ray machine via the conveyor. The TLD's in my luggage

were checked baggage, not carried onboard, so I cannot say one way or the

other whether they were X-Rayed.



Regards, Jim Darrough



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

From: john grant [mailto:grantjoh@pacbell.net]

Sent: Tuesday, May 21, 2002 5:30 PM

To: Jim Darrough

Subject: Re: Exposure from flight









Jim Darrough wrote:



> I guess my point is that I got very little (if any) dose. If I had

compiled

> a set of backround TLD's and kept them in our lead "cave", I would have

been

> a little more accurate. But I didn't, so I'm not. My supposition is that

> since the TLD's I carried on my person (and which went through several

X-Ray

> machines) read almost exactly the same as the ones in my luggage, most of

> the dose was due to backround. I do believe however, that I received a few

mR.



I think you have it backwards.  Your luggage went through the X-ray machine,

you

walked through an RF metal detector.



John Grant







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