6.5 years.

https://www.sustainabilitybynumbers.com/p/nuclear-constructi...

I am counting delays that are always occuring. There is only two reactor blocks that I know that didn't have delays in recent years.

These are build times for just single Reactor Blocks, in 2020 to 2022. https://www.worldnuclearreport.org/IMG/pdf/wnisr2023-v5.pdf#...

Real examples in the last years: Olkiluoto 3 - 17 Years SHIDAO BAY-1 - 9 Years Flammanvill-3 - 17 Years VOGTLE-4 - 11 Years FANGCHENGGANG-4 - 8 Years RAJASTHAN-7 - 14 Years