Actions for Reducing emissions from uranium dissolving [electronic resource].

Email RIS file
Bookmark
Report an Issue

Reducing emissions from uranium dissolving [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
43 pages : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
This study was designed to assess the feasibility of decreasing NOₓ emissions from the current uranium alloy scrap tray dissolving facility. In the current process, uranium scrap is dissolved in boiling nitric acid in shallow stainless-steel trays. As scrap dissolves, more metal and more nitric acid are added to the tray by operating personnel. Safe geometry is assured by keeping liquid level at or below 5 cm, the depth of a safe infinite slab. The accountability batch control system provides additional protection against criticality. Both uranium and uranium alloys are dissolved. Nitric acid is recovered from the vapors for reuse. Metal nitrates are sent to uranium recovery. Brown NOₓ fumes evolved during dissolving have occasionally resulted in a visible plume from the trays. The fuming is most noticeable during startup and after addition of fresh acid to a tray. Present environmental regulations are expected to require control of brown NOₓ emissions. A detailed review of the literature, indicated the feasibility of slightly altering process chemistry to favor the production of NO₂ which can be scrubbed and recycled as nitric acid. Methods for controlling the process to manage offgas product distribution and to minimize chemical reaction hazards were also considered.
Report Numbers
E 1.99:ornl/tm--12211
ornl/tm--12211
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
10/01/1992.
"ornl/tm--12211"
"DE93005262"
Griffith, W.L.; Googin, J.M.; Compere, A.L.; Huxtable, W.P.
Type of Report and Period Covered Note
Topical; 10/01/1992 - 10/01/1992
Funding Information
AC05-84OR21400
View MARC record | catkey: 14146819