Development of Fuel-model Interfaces: Investigations by XPS, TEM, SEM and AFM
The presented work aims to reproducibly prepare UO2¿Pd thin film model systems for spent nuclear fuel
in order to further investigate surface reactions of these films under relevant redox conditions. The sputter
co-deposition of U and Pd (fission product) in the presence of O2 results in the homogenous distribution
of Pd in a crystalline UO2 matrix. Heating the films causes the diffusion of film components. Hereby,
the formation of e-particles has to be clarified. First electrochemical studies show the influence of the
nobel metal Pd on the redox behaviour of UO2. With increasing Pd concentration the matrix dissolution
is decreased. However, we could demonstrate that blocked oxidation processes are of temporary nature.
The passivation of the Pd reactive sites with increasing number of cycles finally induces the approximation
of the mixed system to the redox behaviour of the pure UO2 system.
STUMPF Silvia;
SEIBERT Alice;
GOUDER Thomas;
HUBER Frank;
WISS Thierry;
RÖMER J.;
2009-03-04
ELSEVIER SCIENCE BV
JRC50733
0022-3115,
www.elsevier.com/locate/jnucmat,
https://publications.jrc.ec.europa.eu/repository/handle/JRC50733,
10.1016/j.jnucmat.2008.08.061,
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