Print Email Facebook Twitter Investigation of the Cs2(Mo,Te)O4Solid Solution and Implications on the Joint Oxyde-Gaine System in Fast Neutron Reactors Title Investigation of the Cs2(Mo,Te)O4Solid Solution and Implications on the Joint Oxyde-Gaine System in Fast Neutron Reactors Author Epifano, E. (TU Delft RST/Reactor Physics and Nuclear Materials) Volfi, Andrea (Politecnico di Milano) Abbink, Maas (Student TU Delft) Nieuwland, Hendrik (Student TU Delft) van Eijck, L. (TU Delft RST/Neutron and Positron Methods in Materials) Wallez, Gilles (PSL Research University) Banerjee, Dipanjan (Katholieke Universiteit Leuven) Martin, Philippe M. (Université de Montpellier) Smith, A.L. (TU Delft RST/Reactor Physics and Nuclear Materials) Date 2020 Abstract The formation of a thin layer, the so-called Joint Oxyde-Gaine (JOG), between the (U,Pu)O2 fuel pellets and the cladding has been observed in fast neutron reactors, due to the accumulation of volatile fission products. Cs2MoO4 is known to be one of the major components of the JOG, but other elements are also present, in particular tellurium and palladium. In this work, an investigation of the structural and thermodynamic properties of Cs2TeO4 and Cs2Mo1-xTexO4 solid solution is reported. The existence of a complete solubility between Cs2MoO4 and Cs2TeO4 is demonstrated, combining X-ray diffraction (XRD), neutron diffraction (ND), and X-ray absorption spectroscopy (XAS) results. High-temperature XRD measurements were moreover performed on Cs2TeO4, which revealed the existence of a α-β phase transition around 712 K. Thermal expansion coefficients were also obtained from these data. Finally, phase equilibra points in the Cs2MoO4-Cs2TeO4 pseudobinary phase diagram were collected using differential scanning calorimetry and used to develop a thermodynamic model for this system using a regular solution formalism. To reference this document use: http://resolver.tudelft.nl/uuid:126d4cea-7275-44b0-8d51-7e53275fccf5 DOI https://doi.org/10.1021/acs.inorgchem.0c01307 ISSN 0020-1669 Source Inorganic Chemistry, 59 (14), 10172-10184 Part of collection Institutional Repository Document type journal article Rights © 2020 E. Epifano, Andrea Volfi, Maas Abbink, Hendrik Nieuwland, L. van Eijck, Gilles Wallez, Dipanjan Banerjee, Philippe M. Martin, A.L. Smith Files PDF acs.inorgchem.0c01307.pdf 3.12 MB Close viewer /islandora/object/uuid:126d4cea-7275-44b0-8d51-7e53275fccf5/datastream/OBJ/view