Earlier quoted context omitted.
France imports a lot of gas generated power from Germany over the course of the year. Without Germany's readily available gas turbines, France wouldn't be able to stabilize their net. Same the other way around where Germany relies on France's almost always available nuclear power.
Also, we (the French) made a stupid move by closing the Fessenheim power plant although it have passed all the security checks and could have continue to work for one or more decades.
See https://www.n-tv.de/politik/Pannen-AKW-Fessenheim-geht-vom-N...:
> Fessenheim liegt in einem Erdbebengebiet, das Kraftwerk ist gegen einen Flugzeugabsturz oder Anschlag unzureichend geschützt. Zudem kam es immer wieder zu Pannen.
That says: It was in an seismic active zone, unprotected against plane crashes or terror attacks. There also were a bunch of accidents.
Those old reactor designs weren't safe.