Study of corrosion of nuclear fuel cladding by photoelectrochemical response

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Abstract

The photoelectrochemical response of Zr oxide, produced by high-temperature hydrothermal oxidation, was studied. The aim was to characterise the kinetics of oxidation and to propose a simple method for the determination of oxide thickness. Photocurrents, measured with the oxide biased anodically in neutral Na sulphite solutions, under illumination with visible light, showed a more than two orders of magnitude variation with oxidation time. Sulphite ions react with the photoinjected holes easily. The observations could be described in terms of recombination of photoproduced charge carriers in the course of their diffusion across the oxide layer. The proportionality between oxide thickness, Lox, and the cube root of oxidation time, toxLoxαtox1/3, was demonstrated, and a way for the estimation of oxide thickness was given.

Original languageEnglish
Pages (from-to)321-323
Number of pages3
JournalRadiation Physics and Chemistry
Volume67
Issue number3-4
DOIs
Publication statusPublished - Jun 1 2003

Keywords

  • Oxidation kinetics
  • Oxide layer
  • Primary circuit
  • Zr-1%Nb

ASJC Scopus subject areas

  • Radiation

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