17 out of the 56 plants are in shutdown right now. https://jpt.spe.org/france-turns-to-coal-as-nuclear-plant-sh...
It does not matter that plants are in maintenance, that is the normal state of complex systems like nuclear plants and a very desirable one. Sure, we could do better and close the last two coal factories to get 0% of coal modulo imports. That is still very different from 0% of nuclear. :)