France: https://www.sciencedirect.com/science/article/abs/pii/S03014...
US: https://news.mit.edu/2020/reasons-nuclear-overruns-1118
This is truly remarkable phenomenon that occurs with almost no other technology. And this happening in France rules out the possibility that it's merely increasing regulatory burden that causes increasing costs.
Those who want us to build new nuclear need to grapple with the issue of their cost if they want it to happen, yet I have not found a single nuclear advocate on HN that will acknowledge that these issues even exist, much less bother to propose some solution.
At least for the "safety" issues, we can have a discussion about how designs can mitigate that. But there also needs to be discussion on how design, workforce training, logistical management, or something can improve the construction issues.
Part of the problem is that nobody has built the things in the past 30-40 ish years.