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Production of U/sub 3/O/sub 8/ by uranyl formate precipitation and calcination in a full-scale pilot facility

Technical Report ·
OSTI ID:6512161
; ;
The uranyl formate process for the production of U/sub 3/O/sub 8/ with a controlled particle size has been extensively studied on a laboratory scale. Based on this study, a pilot-scale facility (the Uranyl Formate Facility) was built to investigate the key steps of the process on a larger scale. These steps were the precipitation of a uranyl formate monohydrate salt and the calcination of this salt to U/sub 3/O/sub 8/. Tests of the facility and process were conducted at conditions recommended by the laboratory-scale studies for a full-scale production facility. These tests demonstrated that U/sub 3/O/sub 8/ of the required particle size for the PM process can be produced on a plant scale by the calcination of uranyl formate crystals. The performance of the U/sub 3/O/sub 8/ produced by the uranyl formate process in fuel tube fabrication was also investigated. Small-scale extrusion tests of U/sub 3/O/sub 8/-Al cores which used the U/sub 3/O/sub 8/ produced in the Uranyl Formate Facility were conducted. These tests demonstrated that the U/sub 3/O/sub 8/ quality was satisfactory for the PM process.
Research Organization:
Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
DOE Contract Number:
AC09-76SR00001
OSTI ID:
6512161
Report Number(s):
DP-1688; ON: DE85001772
Country of Publication:
United States
Language:
English

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THERMOCHEMICAL PROCESSES
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URANIUM OXIDES
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URANYL COMPOUNDS