Semi-submersible nuclear power plant and multi-purpose platform

A semi-submersible, electrical power generating spar platform, configured with positive buoyancy comprising:

• a vertical column defining a vertical axis of the platform;
• a topside deck about the vertical column together configured with the positive buoyancy to rise above a sea surface;
• a main control deck situated below the topside deck, the main control deck also about the vertical column, the main control deck further housing equipment for command and control of the semi-submersible spar platform;
• a reactor generator deck, also about the vertical column for housing a pressurized water nuclear reactor, a steam generator thermally coupled to the reactor and a steam turbine generator for generating electrical power, the reactor generator deck situated below the main control deck;
• a heat exchanger configured below the reactor generator deck, the heat exchanger further thermally coupled to a body of water, the heat exchanger being configured below the main control deck and the reactor generator deck;
• a cylindrical seawater tank housing said heat exchanger thereby housing the heat exchanger in a wet tank;
• a cool seawater effluent configured to the cylindrical seawater tank;
• and
• a cold seawater inlet configured to the cylindrical seawater tank below the cool seawater effluent, wherein the wet tank provides ballast, buoyancy control and stability to the spar platform, wherein the heat exchanger further provides heat transfer to a steam cycle comprising the steam turbine generator, further wherein the vertical column extends down below the sea surface through the main control deck and through the reactor generator deck.