I find stuff like this intresting
https://thebarentsobserver.com..../en/nuclear-safety/2

Expedition finds reactors 56 years after dumping | The Independent Barents Observer
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Expedition finds reactors 56 years after dumping | The Independent Barents Observer

A Russian research expedition has rediscovered the location of the container with two damaged reactors from the Soviet navy submarine K-19, dumped in Ambrosimova Bay in 1965.