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Re: Class Y Uranium Chemotoxity?



You can find it on the DOE TIS web page but for some reason it only shows up if you look under the recently approved standards.

The web address is http://tis.eh.doe.gov/techstds/standard/standfrm.html 

Then select the recently approved  section and it will appear.

Dan Burnfield, CHP PE

Defense Nuclear Facilities Safety Board
625 Indiana Ave, NW Ste. 700
Washington, DC  20004

Tel:  202.694.7113
Fax: 202.208.6518
Email danb@dnfsb.gov

>>> Rodney Bauman <RBauman@wssrap.com> 01/18/01 09:04AM >>>

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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