AW: [ RadSafe ] Gamma measurements in planes

[Rainer.Facius at dlr.de]

Charles:

	Between Boston (42.35 degree N ) and Florida (Orlando? 29 degree N ) the present (quiet sun) effective dose rate at 35 kft would vary between 7.4 and 5.1 microSv/h. Unless you took care to take your readings at the same geographical latitude (aside from the altitude), the variation could easily be accounted for. Furthermore, depending on the distance of your seat from the fuel tanks and their fuel content you can observe substantial variations due to the high energy 'albedo' radiation from the fuel. So probably you need neither DU nor Tritium or any other radioactive material to explain your observed variation.

Regards, Rainer

Dr. Rainer Facius
German Aerospace Center
Institute of Aerospace Medicine
Linder Hoehe
51147 Koeln
GERMANY
Voice: +49 2203 601 3147 or 3150
FAX:   +49 2203 61970

-----Ursprüngliche Nachricht-----
Von: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] Im Auftrag von Ellars, Charles
Gesendet: Montag, 18. Dezember 2006 16:24
An: Olsson Mattias :MSO; radsafe at radlab.nl
Betreff: RE: [ RadSafe ] Gamma measurements in planes

On a recent trip to FL from Boston, my RadEyeG measured 0.01 mr/hr on the ground and 0.40 mr/hr at 35Kft during the day.  On the return flight the next night it measured 0.01 on the ground and 0.30 mr/hr.  These are completely unscientific since I probably changed locations relative to DU ballast if any.  Also, I don't know what energies were involved and therefore can't correlate the response of the RadEyeG.  Still it was interesting.

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf Of Olsson Mattias :MSO
Sent: Saturday, December 16, 2006 1:14 PM
To: radsafe at radlab.nl
Subject: [ RadSafe ] Gamma measurements in planes

There has been some writing about dose rate measurements in planes. I seem to recall that DU can be used as ballast in planes. Even though not exceptionally active, I suppose that could affect measurements somewhat inside a plane!

Mattias Olsson
PhD, Nuclear chemistry
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