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Journal articles
Fabrication of (U,Am)O$_2$ pellet with controlled porosity from oxide microspheres
Abstract : U$_{1-x}$Am$_x$O$_{2\pm\sigma}$ mixed-oxides are considered as promising compounds for americium heterogeneous transmutation in Sodium Fast Neutron Reactor. Porous microstructure is envisaged in order to facilitate helium and fission gas release and to reduce pellet swelling during irradiation and under self-irradiation. In this study, the porosity is created by reducing (U,Am)$_3$O$_8$ microspheres into (U,Am)O$_2$ during the sintering. This reduction is accompanied by a decrease of the lattice volume that leads to the creation of open porosity. Finally, an (U0.90Am0.10)O2 porous ceramic pellet (D$\sim$89% of the theoretical density TD) with controlled porosity ($\geq$ to 8% open porosity) was obtained from mixed-oxide microspheres obtained by the Weak Acid Resin (WAR) process.
Cited literature [20 references]
https://hal-cea.archives-ouvertes.fr/cea-02421920
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Submitted on : Thursday, February 20, 2020 - 4:32:53 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:15 AM
Long-term archiving on: : Thursday, May 21, 2020 - 1:29:45 PM
Contributor : Amplexor Amplexor Connect in order to contact the contributor
Submitted on : Thursday, February 20, 2020 - 4:32:53 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:15 AM
Long-term archiving on: : Thursday, May 21, 2020 - 1:29:45 PM
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