Ironically, I hear the ones that were shut down in Germany were some of the best maintained in the world and had very high "capacity factors" even when compared with other nuclear (fraction of time delivering power to the grid). It seems like the solution to poor maintenance is better maintenance? Some of the causes of recent poor French maintenance are analyzed here: https://player.fm/series/decouple/somethings-rotten-with-fre...

I assume you wouldn't seriously argue that rivers are the limiting factor to deployment of nuclear energy.