Nuclear has always had massive scaling issues because leaving base load power generation means ever lower capacity factors. Running a nuclear power plant with a 40% capacity factor more than doubles the cost per kWh.

You can look at Frances ~70% average Capacity factor in 2 ways either it’s a ~30% cost premium over most of the rest of the world on every power plant. Or more realistically ~40% of generation was at the normal ~92% CF, and every plant after that was at lower capacity factors until the final power plant was costing ~3X as much per kWh.

And that’s with them having largely non nuclear countries to export power to on nights and weekends. The economics look even worse if every country try’s to scale nuclear power.

PS: I respect Frances investment in subsidizing nuclear power, but it’s important to understand the underlying economics if you want to scale nuclear power. The best option for a cheap nuclear grid is massive amounts of cheap storage.