Looked this up, and France is having several nuclear problems at once, including that rivers used for cooling is getting too warm in the summer.

Some of it is indeed security concerns in aging reactors.

https://www.nytimes.com/2022/06/18/business/france-nuclear-p...

Yes, France is shutting down perfectly functional reactors like Fessenheim that could continue working for decades with minimal maitenance. And now electricity prices are projected to dectuple

If only coal and gas were held to the same standard