Abstract
The current generation of weld metals used in BWRs, Alloy 182 and 82, have shown significant susceptibility to SCC in the laboratory and/or the field. With the laboratory data showing less than a factor of two difference in crack growth rate between the ~15% Cr Alloy 182 and the ~20% Cr Alloy 82, it seems clear that Alloy 82 will not be sufficiently resistant for long term SCC resistance. The higher Cr weld metals, Alloy 52i and 52, have dramatically greater (>100X) resistance to SCC than the current generation of weld metals, and indeed exhibit remarkable resistance to high corrosion potential, high water impurity levels, and high stress intensity factor.
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References
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© 2011 TMS (The Minerals, Metals & Materials Society)
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Andresen, P.L. (2011). SCC of High CR Alloys in BWR Environments. In: Busby, J.T., Ilevbare, G., Andresen, P.L. (eds) Proceedings of the 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems — Water Reactors. Springer, Cham. https://doi.org/10.1007/978-3-319-48760-1_16
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DOI: https://doi.org/10.1007/978-3-319-48760-1_16
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