Sure, the abundance of available cooling fluid, seawater, makes sense and that's where the generic word "brine" came from. That needs heat exchangers and piping systems are made of fairly exotic/expensive MOC, mainly copper/nickel alloys, to resist corrosion.
Abundance of cooling fluid is required because of combat service that may rupture the equipment, loose the fluid, etc.
It's quickly fixed and filled with the seawater pump, et voila!
Correction, Geez!
loose ——> lose