Animals clogging up nuclear power plants is a common occurance[1][2][3].

[1]: https://www.bloomberg.com/news/articles/2021-01-21/french-nu...

[2]: https://www.theguardian.com/world/2013/oct/01/jellyfish-clog...

[3]: https://www.independent.co.uk/news/uk/home-news/hinkley-poin...