Scientific article

Preparation of simulated inert matrix fuel with different powders by dry milling method

Published inJournal of nuclear materials, vol. 274, no. 1-2, p. 7-14
Publication date1999-08

Simulated zirconium oxide-based inert matrix fuel (IMF) has been prepared using cerium oxide replacing plutonium oxide, following the conventional pelletising route, in which an improved two-stage attrition mill was employed. Different methods have been applied for the powder preparation. In addition to powder mixing, nitrate solutions have been co-precipitated to bulk gel and to microspheres by the internal gelation process. The calcined porous microspheres were crushed in the attrition mill with a few passes. This co-precipitated powder was compared with three different mixtures of the four commercially available powders (ZrO2, Y2O3, Er2O3 and CeO2). Pellets of a standard size with relative densities higher than 90% TD and comparable grain and pore structures have been obtained. Based on these simulation tests both processes are found suitable for fabricating IMF pellets, which fulfil requirements of a commercial plutonium and uranium mixed oxide (MOX), where applicable. No intensive milling is required to form a solid solution in the sintering step for a (Zr,Y,Er,Ce)O2−x pellet. For the fabrication of plutonium-containing IMF, a similar behaviour can be expected.

Affiliation Not a UNIGE publication
Citation (ISO format)
LEE, Y.-W. et al. Preparation of simulated inert matrix fuel with different powders by dry milling method. In: Journal of nuclear materials, 1999, vol. 274, n° 1-2, p. 7–14. doi: 10.1016/S0022-3115(99)00094-X
Main files (1)
Article (Published version)
ISSN of the journal0022-3115

Technical informations

Creation02/20/2024 9:42:05 AM
First validation02/20/2024 11:59:26 AM
Update time02/20/2024 11:59:26 AM
Status update02/20/2024 11:59:26 AM
Last indexation02/20/2024 11:59:47 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack