Stress Corrosion Cracking of Zircaloy-4 Cladding Tubes. II.--Cs/Cd Mixtures and Fractography

Cf. preceding abstract. The stress corrosion cracking (SCC) susceptibility has been measured for two batches of Zircaloy-4 cladding tubes manufactured to the same specifications. The burst pressures in the presence of Cs/Cd were in some cases lower than those in the presence of iodine, indicating th...

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Bibliographic Details
Published in:Journal of nuclear materials 1984-10, Vol.126 (2), p.103-110
Main Authors: Dannhauser, G, Atrens, A, Baro, G
Format: Article
Language:English
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Summary:Cf. preceding abstract. The stress corrosion cracking (SCC) susceptibility has been measured for two batches of Zircaloy-4 cladding tubes manufactured to the same specifications. The burst pressures in the presence of Cs/Cd were in some cases lower than those in the presence of iodine, indicating that this environment is of potential importance for fuel rod failure. The effect of the Cs/Cd mixtures was similar in both tube types, but was much weaker at slower pressurizing speeds and at 400 deg C, possibly due to a loss of Cs. The fractures produced in the presence of I appear essentially the same as those published previously and very similar to those produced in the presence of Cs/Cd. This probably indicates that a similar mechanism operates in both cases. 8 ref.--AA
ISSN:0022-3115