Hydride precipitation kinetics in Zircaloy-4 studied using synchrotron X-ray diffraction

15Citations
Citations of this article
42Readers
Mendeley users who have this article in their library.

Abstract

As a result of in-reactor corrosion during operation in nuclear reactors, hydrogen can enter the zirconium fuel cladding and precipitate as brittle hydride particles, which may reduce cladding ductility. Dissolved hydrogen responds to temperature gradients, resulting in transport and precipitation into cold spots so that the distribution of hydrides in the cladding is inhomogeneous. The hydrogen precipitation kinetics plays a strong role in the spatial distribution of the hydrides in the cladding. The precipitation rate is normally described as proportional to the supersaturation of hydrogen in solid solution. The proportionality constant, α2, for hydride precipitation in Zircaloy-4 is measured directly using in situ synchrotron X-Ray diffraction, at different temperatures and with three different initial hydrogen concentrations. The results validate the linear approximation of the phenomenological model and a near constant value of α2 = 4.5 × 10-4 s-1 was determined for the temperature range studied.

Cite

CITATION STYLE

APA

Courty, O. F., Motta, A. T., Piotrowski, C. J., & Almer, J. D. (2015). Hydride precipitation kinetics in Zircaloy-4 studied using synchrotron X-ray diffraction. Journal of Nuclear Materials, 461, 180–185. https://doi.org/10.1016/j.jnucmat.2015.02.035

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free