Most of the recent construction of large nuclear plants is in China, and they're actually doing quite well at building them on time. The ones that are super late and over budget are the exception worldwide; they just make the news more often.
Nuclear plants in SK are on time as well, which is quite impressive since they did not have as much training. I guess just having a good plan is enough.
https://en.wikipedia.org/wiki/List_of_commercial_nuclear_rea...