RE: U-235 Weight Percent for Natural Uranium

["Mike Zemyan" <mzemyan@schaferlabs.com>]

29 April 2003



This topic was addressed in the following publication:

"Isotopic fingerprints for natural uranium ore samples",

International Journal of Mass Spectrometry 193 (1999) 9-14, S. Richter et

al.



The authors included the following suggestions for the ranges of natural

variations in uranium atomic percentages:

234U:   0.0054 -  0.0051

235U:   0.7207 -  0.7201

238U:  99.2748 - 99.2739



Michael Zemyan

Schafer Vallecitos Laboratory

Sunol, CA



-----Original Message-----

From: owner-radsafe@list.vanderbilt.edu

[mailto:owner-radsafe@list.vanderbilt.edu]On Behalf Of Redmond, Randy

(RXQ)

Sent: Tuesday, April 29, 2003 10:11 AM

To: 'radsafe@list.vanderbilt.edu'

Subject: U-235 Weight Percent for Natural Uranium





Has anyone seen a document/regulation that states a range for U-235 weight

percent in natural uranium?  Seems like I ran across something years ago,

but cannot locate.



Randy Redmond

Radiological Control Organization

BWXT Y-12 L.L.C.

Oak Ridge, TN

865-574-5640





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