Cherry on top - after producing electricity for about a week, it had to shut down for another 3 months. Then, after ramping up to about 30% of the capacity, it encountered another problem, delaying it for another 5 months. Here we are in June 2022, 17 years later, Olkiluoto 3 provides exactly 0 MW to the Finnish grid
It is true that the 34 CPY reactors, and the 20 P4 reactors, were produced in large enough numbers to create a skilled class of workers and engineers who were deeply experienced with building these reactors, but right now all of those workers are retired.
And honestly, from observation, it appears that rebuilding competence like this is a lot harder than building it in the first place: when you are building the first time everyone- the general public, the regulators, the workers themselves- are more forgiving. When you've lost that capacity and are trying to rebuild it you have expectations set for a mature industry, but the skills aren't there to deliver it.
Consulting the current list of nuclear power plants under construction around the world by a pro-nuclear power group here: https://world-nuclear.org/information-library/current-and-fu...
I see the following as the only ones still under construction in all of Europe (not counting Belarus and Russia): 1) Mochovce 3 in Slovakia. Construction started November 2008, originally scheduled to complete in 2012, now hopefully complete later this year, so 15 years total, 10 years late. 2) Flamenville 3 in France. Construction started in 2007, originally scheduled to complete in 2012. Hopefully complete in 2023, so 16 years later, 11 years late. 3) Mochovce 4 in Slovakia. Construction started November 2008, original scheduled to complete in 2013, now hopefully complete in 2023, so 16 years total, 10 years late. 4,5) Hinkley Point C1 and C2 in the UK. Construction started in roughly 2008, originally expected to be online 2022 or so ("early 2020s" is the best I can find with Google now, and that's for both C1 and C2 to be online). Now C1 is expected to be complete in 2027, and C2 in 2028. So 19-20 years total, 6 years late.
(The US has two reactors on the list, Vogtle 3 and 4, started in 2009, originally expected to finish in 2016 and 2017, now expected to finish in 2023.)
I suspect that Europe's success in building rapid transit, compared to America, is due to the fact that they were continuously building such systems, whereas the US largely hasn't, so there is no cohort of engineers and workers who learned-by-doing and get better over time. But in nuclear, those workers seem to have gone in Europe as well- you can see from this 2020 chart (https://en.wikipedia.org/wiki/Nuclear_power_in_France#/media...) that France built almost all of their reactors in a giant lump between 1970 and 1983, built a few reactors later in the 1980s (presumably late career work from the people who had built so many earlier), and has found building a new reactor to be really hard, e.g. Flamenville 3 is just as big a disaster as Vogtle.