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Título

Kinetics of hydride front in Zircaloy-2 and H release from a fractional hydrided surface

AutorDíaz Muñoz, Marcos ; González-González, Alejandro ; Moya, J. S. ; Remartínez Zato, Begoña; Pérez, S.; Sacedón Adelantado, José Luis
Fecha de publicación29-jun-2009
EditorAmerican Vacuum Society
CitaciónJournal of Vacuum Science and Technology - Section A 27(4): 913-917 (2009)
ResumenThe authors study the hydriding process on commercial nuclear fuel claddings from their inner surface using an ultrahigh vacuum method. The method allows determining the incubation and failure times of the fuel claddings, as well as the dissipated energy and the partial pressure of the desorbed H2 from the outer surface of fuel claddings during the hydriding process. The correlation between the hydriding dissipated energy and the amount of zirconium hydride (formed at different stages of the hydriding process) leads to a near t1/2 potential law corresponding to the time scaling of the reaction for the majority of the tested samples. The calibrated relation between energy and hydride thickness allows one to calculate the enthalpy of the -ZrH1.5 phase. The measured H2 desorption from the external surface is in agreement with a proposed kinetic desorption model from the hydrides precipitated at the surface.
Descripción5 pages.
Versión del editorhttp://dx.doi.org/10.1116/1.3130147
URIhttp://hdl.handle.net/10261/22315
DOI10.1116/1.3130147
ISSN0734-2101
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