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Title

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

AuthorsDíaz Muñoz, Marcos ; González-González, Alejandro ; Moya, J. S. ; Remartínez Zato, Begoña; Pérez, S.; Sacedón Adelantado, José Luis
Issue Date29-Jun-2009
PublisherAmerican Vacuum Society
CitationJournal of Vacuum Science and Technology - Section A 27(4): 913-917 (2009)
AbstractThe 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.
Description5 pages.
Publisher version (URL)http://dx.doi.org/10.1116/1.3130147
URIhttp://hdl.handle.net/10261/22315
DOI10.1116/1.3130147
ISSN0734-2101
Appears in Collections:(ICMM) Artículos
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