Nuclear is one of the least deadly energy sources (taking all deaths, including by nuclear disaster, into account).
Proponents of nuclear power often don't want you to think about what happens when nuclear power has to be doubled, quadrupled, and so on. Nor are the risks really computable at all, with really small chances of extremely bad things happening. And the potential for bad actors at any time.
https://www.edf.fr/en/the-edf-group/dedicated-sections/journ...
Which wouldn't be newsworthy if it wasn't for how it was handled - the local authorities outright refused to even entertain the idea of even temporarily shutting the plant down to check if everything is okay.
This incident isn't serious, but I'm afraid that should a serious incident happen, we won't know until it gets out of control.