Los Alamos Women in Science

Northern Chapter of the New Mexico Network for
Women in Science and Engineering


Thursday, August 5, 1999

LAWIS lunchtime Talk and get-together
11:30 am - 1:30 pm, Otowi cafeteria side room C, LANL

Talk at 12:00:
Angelique Neuman, NMT-9, LANL
"The effects of thermal treatment on uranium oxide properties"


When processing mixed oxide (MOX) fuel (95 wt% UO2 and 5 wt% PuO2) it is desirable for the oxides to have an oxygen-to-metal ratio of about 2.00 in order to obtain densities to specifications. The uranium oxide (UO2) selected was produced via the Ammonium Uranyl Carbonate (AUC) method. Oxygen-to-metal ratio analysis showed that the uranium oxide was hyperstoichiometric indicating the possibility that some U3O8 was present. The powder was thermally treated at 600 fC for 4 hours in flowing argon - 6% hydrogen bubbled through 1.6fC water in order to reduce the oxygen-to-metal ratio. Pellets were pressed and sintered with as-received UO2 as well as with batches made with 25%, 33%, 50%, 75%, and 100% thermally treated UO2 in order to see the effects of thermal treatment. Thermal treatment not only reduced the oxygen-to-metal ratio, but also increased the density of sintered pellets.

--> Nonmembers Welcome! <-- 

Sideroom C is reserved from 11:30 to 1:30 for people who like to eat earlier or later, and informal discussion. You are welcome to come for just the talk at noon, and questions are encouraged!

For driving directions to Otowi Cafeteria (TA-3, building 261) at LANL, see: http://www.lanl.gov/tools/maps
(direct link to map showing the Otowi Building: http://nis-www.lanl.gov/cgi-bin/wthi?ta=3&bldg=261).




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LAWIS Lunch-Time Talk Organizer: Huyen Dinh, dinh@lanl.gov, 665-0737
LAWIS home page: http://home.lanl.gov/lawis
NMNWSE home page: http://www.nmnwse.org