France has 56 nuclear facilities and plans to add more.
They have achieved cost improvements by using cookie-cutter standardized designs. This has not been approved in the USA in the interest of design progress and advancement --- which has been ground to a halt as a result.
Thank you, but you answered a question that wasn't asked.
According to a translation of his remarks published by Reuters, Macron said the French nuclear industry would “remain the cornerstone of our strategic autonomy.”
It's for national security, not because they are built cheaply.