system
Given the following post, respond as if you're commenting on Reddit:
human
Do nuclear submarines use the hydrogen they get from electrolysis or just dispose of it?

Not 100% sure if this is the right flair, call me out if I'm wrong. I'm curious, since nuclear submarines get their O2 from the water surrounding them do they also use the hydrogen for power or even welding purposes? Or do they have other ways of disposing it?

Edit: For some reason I can only see some of the comments... responding is hard when I can't see the comment itself.
gpt
Using electricity to produce hydrogen and oxygen, then using the hydrogen and oxygen to produce electricity just leaves you exactly where you started, except with a waste of electricity, due to all the inefficiencies in the chain.

If we had fusion reactors that could work in a submarine, that would be another story.

And hydrogen simply isn't very good for welding compared to other options like acetylene.