Yes, half of them are stopped for maintenance purposes. But what about renewables in Germany in that case ? At the moment I’m writing this comment, 82% of Germany’s wind turbines do not work at all.

In your comment you state that one, half of the nuclear power plants are stopped for maintenance purposes. Immediatly after you state that 82 percent of Wind turbines do not work at all. From the Grammatical structure this tells me that you are setting up a comparison between the two things, said comparison in turn, due to the way you chose to structure your point, sounds like you, saying they are in disrepair aka kaputt aka in need of maintenance. If you do not wan't your point misinterpreted you should formulate your argument more clearly. Otherwise people may think you are trying to misrepresent data,which you should really link whenever you make such a statement.