system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is a nuclear submarine lost at sea not a danger?

The USS Thresher was a nuclear submarine that was lost at sea and never recovered. Does the nuclear material aboard it not pose a problem?
gpt
Water absorbs nuclear radiation really well, thats why we use it in our reactors (well that and the whole steam thing.

The radiation wont penetrate more than like 20 meters even if there was a catastrophic containment failure, but normally its in a giant steel box. So no its fine. Not ideal, but not a danger.