The time to build nuclear reactors is a completely pointless argument because humanity is going to need low CO2 power forever. Without nuclear wind and solar will ALWAYS require gas turbines for backup.
Even with Danish insolation and weather and tilting the study heavily towards nuclear power by assuming that the nuclear costs are 40% lower than Flamanville 3 and 70% lower than Hinkley Point C while modeling solar as 20% more expensive renewables come out to vastly cheaper when doing system analyses.
https://www.sciencedirect.com/science/article/pii/S036054422...
> Without nuclear wind and solar will ALWAYS require gas turbines for backup.
So this myth is what you need to tell yourself we need nuclear?