Comment by hunterpayne

This type of reactor would probably use super-critical CO2 instead of water to transfer the heat from the reactor to the turbines, so no water. The design is safer that way.

The way water might be used in this design is to make a synthetic fuel instead of electricity. In that case, you are swapping out the turbines for a process that extracts CO2 from seawater, uses electrolysis to crack the water and then a FT process to make a (renewable) hydrocarbon fuel (you might even use some feedstock to make it more efficient).