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Effect of ion irradiation of the metal matrix on the oxidation rate of Zircaloy-4

Marc Tupin 1 Romain Verlet 1 Kimberly Colas 1 Michael Jublot 1 Gérard Baldacchino 2 Krzysztof Wolski 3
2 DICO - Biomolécules Excitées
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
Abstract : The oxidation kinetics acceleration observed in Zircaloy-4 cladding in Pressurized Water Reactor could be partially due to metal irradiation damage occuring in-pile. To check this assumption, several ion irradiation tests of the Zircaloy-4 metal matrix were performed to reproduce the evolution of the metallurgical state in reactor. This study showed that the amorphization process of the intermetallic precipitates (SPPs) does not change significantly the oxidation rate of Zircaloy-4. Implantation of iron in the matrix to simulate iron dissolution from the SPPs has no real impact on the corrosion kinetics. However proton irradiations at 350 °C producing dislocation loops resulted in a significant increase in the oxidation rate.
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Submitted on : Friday, October 12, 2018 - 2:39:31 PM
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Marc Tupin, Romain Verlet, Kimberly Colas, Michael Jublot, Gérard Baldacchino, et al.. Effect of ion irradiation of the metal matrix on the oxidation rate of Zircaloy-4. Corrosion Science, Elsevier, 2018, 136, pp.28 - 37. ⟨10.1016/j.corsci.2018.02.023⟩. ⟨cea-01894462⟩



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