Class Y Uranium Chemotoxity?

[Rodney Bauman <RBauman@wssrap.com>]

Tim and fellow Radsafers:

-----Original Message-----
From: Tim Gillespie [mailto:tgillespie@sec-tn.com]
Sent: Wednesday, January 17, 2001 3:52 AM
To: Multiple recipients of list
Subject: RE: Request for Info on DU Munitions: Useful(?) Information

"For class "Y" Uranium, chemotoxicity is the limiting toxicity below 0.82%
enrichment. Therefore, chemotoxicity prevails for DU."
_______

This is an interesting deviation from past guidance (e.g, HP Manual of Good
Practices for Uranium Facilities, Table 2-12, and 10CFR20, App B, Footnote
3).  It has always been the presumption that Class Y uranium's radiotoxicity
always dominated its chemotoxicity, even at the specific activity of
depleted uranium.  What is even more interesting is that 0.82% is greater
than natural/normal abundance.  Is this from DOE-STD-1136-2000?  I don't
have a copy and was unable to locate it on the DOE TIS website.  Do you have
any suggestions on where I can obtain a copy?

Thanks for any insight,

Rodney Bauman, CHP,RRPT
rbauman@wssrap.com


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