[ RadSafe ] In Soviet Russia, you enlighten p-versus-T diagram of uranium-oxygen system

[ROY HERREN]

James,
   
     Can you clarify and or elaborate on your sentence in which you state, "It isn't detected because when it condenses, for the portion that does not remain dissolved in air, it decomposes almost entirely to U3O8".  Specifically I don't understand what you trying to communicate when you write about  "the portion that does not remain dissolved in air". Are you referring to the gas that has condensed into U3O8 AKA "solid matter" and being relatively heavy falls out onto the earth; or are you trying to argue that some portion of the Uranium Trioxide gas manages to avoid reaching ambient atmospheric pressure shortly after leaving it's point of combustion and also manages to avoid radiating away enough thermal energy to avoid the condensation process?
   
     Whats wrong with " the military not measuring the gas combustion products"?  Why can't they just simple measure the fallout from the condensed gas and work out from that data the environmental damage? 
   
  Roy Herren

  

James Salsman <james at bovik.org> wrote:
  > > Levinskii, Y.V. (1974) "p-versus-T Phase Diagram of the
> > Uranium-Oxygen System" Atomic Energy 37(4):1075-6 is at:
> >
> > http://bovik.org/du/Levinskii74.pdf
> >
> > Please correct me if I'm wrong, but that looks pretty clearly like
> > uranium trioxide reaches 1 atm of partial pressure at about 1300
> > degrees Celsius.
> >
> > Sincerely,
> > James Salsman
>
> Aug. 8
>
> And your point is . . . . .?
>
> Steven Dapra

It's a substantial combustion product. Dr. Alexander was right.

I think that the actual partial pressure in air (80% N2) is about
7E-7*e^(Kelvins/135) mbar, per data from two different sources
(spanning 50 years) plotted here:

http://www.bovik.org/du/vol_uo3g.png

The temperatures increase as the burning particles get smaller,
with most of the burning surface area consumed between 2500
and 3000 K:

http://www.bovik.org/du/scans/mb-392.jpg

There is now absolutely no question that uranium trioxide gas
is a major, if not the major, combustion product of uranium in air.
It isn't detected because when it condenses, for the portion that
does not remain dissolved in air, it decomposes almost entirely
to U3O8.

And now there is no excuse for the military not measuring the
gas combustion products, which they still haven't.

Sincerely,
James Salsman
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Roy Herren
 		
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