The Iberian peninsula blackout was caused by poor planning and over-subsidizing solar. When there's a lot of sunlight and not much demand the prices fall drastically so nuclear plants were turned off to stop losing money. The problem is nuclear energy works as a sort of pacemaker for the whole grid. For months there were warnings of wild fluctuations but the Socialist coalition government ignored them. They had appointed a politician with good optics (a rabid "green"/feminist) to manage the grid who just doubled down on policy until the blackout.
https://en.wikipedia.org/wiki/2025_Iberian_Peninsula_blackou...
And France might be good today but it is playing with disaster with very old nuclear plants.
https://www.lemonde.fr/en/france/article/2023/02/03/the-long...
> Amortize France's 56 existing nuclear reactors as much as possible – which are 37 years old on average currently – is part of EDF's strategy. The highly-indebted company, which is in the process of becoming 100% state-owned again, intends to "make the best use" of its "industrial heritage," Lewandowski also told Le Monde.
IMHO the whole EU should do an overhaul and make a reasonable plan to have a decent and stable grid. Some of the best companies and universities for nuclear power are in Europe! The continent should get rid of the rabid "greens". But sadly they always manage to stay in power, even if they get less than 20%! In left-wing coalitions like Spain and France they mark the agenda. And Germany's new "center-right" government needs the "greens" so they have a lot more power than they should. They talk about a plan and nuclear but there's zero funding. It's very sad.