Re: FW: Sickening Solar Flares

[John Jacobus <crispy_bird@yahoo.com>]

I agree, and was not excusing their statements.  I was

questioning the basis of the value.  



Of course, this is the same organization that confused

English and metric units during an expedition to Mars

a few years back.



--- farbersa <farbersa@optonline.net> wrote:



> John:

> 

> Nonetheless, if NASA can "confuse" exposure to a

> small volume of tissue  

>  from a dental x-ray and equate it erroneously to

> the potential effect of  

> whole body dose they have a problem-- both from a

> technical and  

> credibility/public communications perspective.

> 

> Stewart Farber

> ===============

> On Fri, 28 Jan 2005 06:56:53 -0800 (PST), John

> Jacobus  

> <crispy_bird@yahoo.com> wrote:

> 

> > Of course, NASA could have confused the entrance

> > exposure rather than the dose equivalent.

> >

> > --- farbersa <farbersa@optonline.net> wrote:

> >

> >> 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]

> -- 

> Stewart Farber

> Consulting Scientist

> 1285 Wood Ave.

> Bridgeport, CT 06604

> [203] 367-0791 [home office]

> 

> 

> -- 

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> Date: 1/25/2005

> 

> 





=====

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

"It doesn't matter whether you're riding an elephant or a donkey if you're going in the wrong direction."

Jesse Jackson





-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com





		

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