Which proven French technology?

Given the outcome of Flamanville 3 and that the proposed subsidies for the EPR2 fleet are ruinously expensive France is unable to build competitive new nuclear.

Not sure why this is downvoted. Look up Olkiluoto 3 in Finland, it was 14 years late and (depending on whose figures you believe) cost nearly 10x more than the original estimate of €3 billion, bankrupting Areva in the process.