French nuclear supply chain atrophied quite lot in the last 30 years. Don't forget that even in France, president Hollande promised in 2014 to the voters to slash nuclear's contribution of power generation by 2025.

https://spectrum.ieee.org/renewables-up-nuclear-down-in-fren...

It was only when Russia started invasion in 2022, that the politicians in France started to change their opinion.

If you want build a nuclear power plant you go to nuclear supplier with uninterrupted experience in building nuclear power plants, like South Korea, China or Russia.

The South Koreans build Barakah nuclear power plant 5600 MWe for $32bn.

https://en.wikipedia.org/wiki/Barakah_nuclear_power_plant

https://www.powermag.com/uaes-first-reactor-gets-go-ahead/

> French nuclear supply chain atrophied quite lot in the last 30 years.

Because today it makes no economic sense. Supply chain for horse carts is also very atrophied.

>The South Koreans build Barakah nuclear power plant 5600 MWe for $32bn.

Still very expensive. Flamanville is an extreme when things go really bad, but 175 MWe for 1 bn is also very high. 1 bn buys ~1 GW of solar, ~1 GW of onshore wind, or ~3 GW of battery capacity. You should only build new nuclear either to get a better mix in the grid (up to 5% is the nuclear lobby recommendation), or because you have no sun and no wind.