It's not typical though it is the case at the moment [1] (in French)

The argument is a little disingenuous in any case because temporarily stopping reactors for maintenance, especially planned maintenance (in this case delayed because of Covid), is not at all the same as the inherent uncertainty that sources dependent on the weather (e.g. wind) suffer from.

As said, with nuclear/gas/coal/etc you know what you'll get pretty much day in day out. With wind it's never guaranteed.

[1] https://www.radiofrance.fr/franceculture/podcasts/la-questio...