[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: Give Me You Opinion
Scott,
Yesterday I posted a message to this thread, to wit:
> Scott,
> Obviously processing and handling of UF6 requires specialized equipment
> and
> trained personnel. We for instance, use Iconel (high Nickel, high Chrome,
> steel alloy) to line reaction vessels and pipes at our UF6-UF4 reduction
facility in SC. ......
I was corrected by one of my astute colleagues here at Starmet, we use
Monel, an alloy containing
high nickel and high copper to line our reaction vessels to resist the
highly corrosive envrionment.
Please make note of the correction.
thanks
Frank
Frank J. Vumbaco
VP Health & Safety
Starmet Corporation
2229 Main Street
Concord, MA 01742
voice : 978.369.5410 X 296
fax : 978.371.1677
email: Mailto:vumbaco@starmet.com
>
>
>
> ----------
> From: Scott D Kniffin
> Reply To: radsafe@romulus.ehs.uiuc.edu
> Sent: Wednesday, January 27, 1999 12:55 PM
> To: Multiple recipients of list
> Subject: Re: Give Me You Opinion
>
> Mike,
>
> Yes the fluorine aspect is the problem for UF6. I had a professor at U of
> Maryland that inhaled some at Oak Ridge in his youth and his voice sounded
> gravely and hoarse all the time from it. Nasty corrosive stuff. Rumor
> has
> it that Teflon was invented/discovered/figured-out-to-be-excellent for
> dealing with UF6 because it ate at the plumbing of the permeable membrane
> gas separators in the early enrichment work. Anyone out there know the
> answer to this? I've always wondered.
>
> Scott Kniffin
>
> RSO Unisys Federal Systems, Lanham, MD
> CHO Radiation Effects Facility, GSFC, NASA
> mailto:Scott.D.Kniffin.1@gsfc.nasa.gov
>
> The opinions expressed here are my own. They do not necessarily represent
> the views of Unisys or NASA. This material has not been reviewed by my
> manager or NASA.
>
> At 10:19 01/27/99 -0600, you wrote:
> >I agree with your response. I do have a question about the UF6. Are you
> >concerned about the fluorine aspect? The specific activity of U238 is
> >180,000 times less than Pu 239. Assuming its all U235, then were talking
> >28000 time lower SA. The biological half lives are 9-15 DAYS for U and
> 200
> >YEARS for Pu. Inhaled U is not a major threat.
> >
> >Of course my own opinion.
> >
> >Mike Dempsey
> >
>
> ************************************************************************
> The RADSAFE Frequently Asked Questions list, archives and subscription
> information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html
>
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html