Experimental investigations and thermodynamic modelling of the ternary system Pb-Mo-O
Andries van Hattem (TU Delft - RST/Reactor Physics and Nuclear Materials)
R. Dankelman (TU Delft - RID/TS/Technici Pool)
E. Colineau (European Commission Joint Research Centre)
J. C. Griveau (European Commission Joint Research Centre)
K. Dardenne (Karlsruhe Institut für Technologie)
J. Rothe (Karlsruhe Institut für Technologie)
S.D. Couweleers (TU Delft - RST/Technici Pool)
Rudy J.M. Konings (TU Delft - RST/Reactor Physics and Nuclear Materials)
A. L. Smith (TU Delft - RST/Reactor Physics and Nuclear Materials)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
A combined experimental and modelling study into the Pb-Mo-O system has been conducted in view of the safety analysis for lead-cooled nuclear systems. The thermal expansion and low-temperature heat capacity of the ternary compounds PbMoO4 and Pb2MoO5 have been determined experimentally, as well as the melting enthalpy of PbMoO4. Moreover, XANES measurements have confirmed the hexavalent oxidation state of Mo in PbMoO4 and Pb2MoO5.
A thermodynamic model of the ternary system including the ternary phases PbMoO4, Pb2MoO5 and Pb5MoO8 has also been developed in this work based on the CALPHAD methodology. For the first time, an ionic two-sublattice model is used for the liquid phase, while the compound energy formalism is used for the solid phases.
help_outline