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Originally Posted by Irace86.2.0
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while it's a problem, digging a little deeper gives a little more clarity
https://www.world-nuclear-news.org/A...orrosion-issue
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Doroszczuk said that it seemed that EDF’s older 900 MW reactors - there are 32 of them in total - were not as affected by the corrosion problems as the others, where the initial design by Westinghouse had been "Frenchified" with the new "geometry of the lines" now seen as a more likely cause of the issue than the welds themselves. This new "geometry of the lines" promotes a phenomenon of thermal stratification of the fluid at the top and bottom of the pipe, which generates stress in the weld zones, he said.
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so it's really more of a thermal-cycling issue than a corrosion issue. i assume it's a translation difference.
but also interesting is how they 'frenchified the geometry of the lines', which seems to have created unintended thermal loading by re-designing the line orientation from the original design...
so they literally said "hey westinghouse, we're french, we know better, watch this"
and now westinghouse gets to say "lol, how's our design now?"