The other way round, actually. France recently had massive problems because they had to switch off multiple nuclear plants for unexpected maintenance issues, and bought lots of power from Germany
Unplanned shutdowns are a increasing occurrence in France because of aging reactors and overheating/freezing rivers
Is this really what German press is reporting? What a gross lie. The "overheating" is neither due to the reactor (simply it getting hot naturally) nor actively threatening to the reactor: they are just stopped to avoid making the situation slightly worse. Temperature difference at the output of a nuclear plant is barely a degree.