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Re: FW: Sickening Solar Flares

On Thu, 27 Jan 2005 13:39:28 -0800, Careway, Harold A. (GE Energy)  

<Harold.Careway@gene.GE.com> wrote:



> How different it is when you don't work in the nuclear industry.

>

> hal

>

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

> From: bounce-snglist-64594@lyris.msfc.nasa.gov

> [mailto:bounce-snglist-64594@lyris.msfc.nasa.gov]On Behalf Of NASA

> Science News

> Sent: Thursday, January 27, 2005 12:12 PM

> To: NASA Science News

> Subject: Sickening Solar Flares

>

>

> NASA Science News for January 27, 2005

>

> The biggest solar proton storm in 15 years erupted last week. Here on

> Earth, we were safe, protected by our planet's thick atmosphere and

> magnetic field.  But what would have happened to an astronaut in space?

> NASA researchers have the answer.

>

> FULL STORY at

>

> http://science.nasa.gov/headlines/y2005/27jan_solarflares.htm?list64594

...............

========

Hello all:



How very odd that NASA would compare 1 rem whole body from solar flares  

which they erroneously equate to 10 dental x-rays at 0.1 Rem each!! One  

would certainly hope NASA could do a better job of explaining radiation  

exposure accurately than this.



According to the HPS Ask the Expert Question #1193 at:



http://hps.org/publicinformation/ate/q1193.html



the dose equivalent of even a panoramic x-ray [highest dose dental x-ray]  

is 26 micro-Sv [2.6 mR NOT 100 mR as NASA states]. So NASA overstates the  

dose from even a dental panoramic x-ray by a factor of about 40, and 1 Rem  

whole body would be equal to about 400 panoramic x-rays. A single  

intra-oral x-ray is about 10 micro-Sv [1 mR] dose equivalent. So compared  

to the typical intraoral x-ray, NASA's estimate of 100 mR from a typical  

dental x-ray is 100 times too high and 1 Rem whole body would be equal in  

dose equivalent to 1000 intraoral x-rays.



Best,



Stewart Farber

[203] 367-0791 [home office]

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