[ RadSafe ] 10 rem from lightning?? (UNCLASSIFIED)

[Perle, Sandy]

John,

I'd expect some optical density since film dosimetry can accurately detect and report dose at 10 mrem (0.10 mSv). If a film, dosimetry or otherwise, is exposed to doses in the rem range, you can definitely expect an issue! If you let your camera film go through a carry-on x-ray unit, the exposure is in the tenths of mrem. Checked baggage could be irradiated to between 150 and 300 mrem each time it goes through a unit. This will damage the film, no doubt. As stated, I don't buy the premise of lightning causing this level of ionizing radiation, period.

Regards,

Sandy

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Sander C. Perle
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On Mar 30, 2010, at 3:12 PM, <JOHN.RICH at sargentlundy.com> wrote:

>
> Just a quick thought.  Would a few rem fog camera film?  (used to carry a film camera and usually had fairly sensitive color film.)  Has anybody had experience with film fogging after a lightning strike on an airplane?  Not as good as a badge, but it would support, or challenge the notion of significant x-rays.  Otherwise, has anybody had an environmental dosimeter register a surprise high dose rate (assuming a lightning strike nearby).
>
> just looking for something that would register the xrays, or support the fact that they aren't significant.
>
>  - -jmr
>
> John Rich
> 312-269-3768


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