Title: Synthesis of (Zr, Y,Am)O2-x transmutation targets
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 433 no. 1-3 p. 314-318
Publication Year: 2013
JRC N°: JRC58518
ISSN: 0022-3115
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC58518
DOI: http://dx.doi.org/10.1016/j.jnucmat.2012.08.037
Type: Articles in periodicals and books
Abstract: An optimised process consisting of sol gel external gelation and infiltration steps has been developed for the fabrication of oxide fuels and targets for the transmutation of minor actinides. Process development for yttria stabilised zirconia based americium targets has included the introduction of carbon into the sol gel produced beads, removal of which leads to higher porosity increasing the maximum amount of americium that can be infiltrated in a single step. Furthermore, the beads are softened enabling better pressing characteristics and most importantly an optimised microstructure devoid of lenticular pores. This microstructure improvement, along with the 2-3% higher density has a strong positive effect on the thermal conductivity, which is increased by 40%. Thus, the margin between operating temperature and melting temperature of the fuel is increased, improving dramatically safety aspects of the fuel in the reactor.
JRC Directorate:Nuclear Safety and Security

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