Just like the scene in Ice Station Zebra, when they nearly melted the turbines in reverse as the forward torpedo room flooded.
Every subsimmer needs to read:
The Complete Idiot's Guide to Submarines, by Michael DiMercurio, Michael Benson.
Particularly Part I:
section 3 - Keep water out of the People Tank
section 5 - Emergencies; Part one ("
Submarines, as you've no doubt gathered, are not the world's safest places to be. Here we begin to look at the worst that can happen, and what to do if it does.")