Re: Kosov DU - New Scientist Report

["Elizabeth M. Brackett" <brackett@bright.net>]

I'm not sure why the limit would apply to soluble uranium, but insoluble
uranium is more of a hazard chemically than radiologically under chronic
exposure conditions.  It can do renal damage so the limiting factor is the
amount that is retained in the kidneys.

Liz Brackett

At 09:01 AM 6/7/99 -0500, you wrote:
>American Conference of Government Industrial Hygenists set the MPC for
>insol or soluble U at 200 microgram/ m3 air in 1993.
>
 ---- stuff deleted ------
>
>In fact, the 1mSv/yr limit corresponds to about 0.5 microgram/m3, and the
>20mSv/yr limit to 10 microgram/m3. If you do a similar calc. for DU it
>comes out a bit higher, 0.7 microgram/m3 for 1mSv/yr.
>
>Can anyone explain why the ACGIH set a figure of 200 microgram/m3? Have I
>made an error somewhere? Is there a misprint somewhere along the line?

******************************
  Elizabeth M. Brackett, CHP 
     Sr. Health Physicist     
     MJW Corporation, Inc.       
       (330) 644-3757        
  mailto:brackett@bright.net 
******************************
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