So I have been doing some research on The Engineer about the proposed design aspects (including designs for safety) regarding France's underwater nuclear reactors. It looks like the mini-reactors will be designed like nuclear submarines and will produce 50-250 megawatts. Power cables would transport electricity from the plant to the coast. And like many have discussed in the comments...yes the sea water will be used as a natural coolant. Just like nuclear submarines their will be extreme measures taken to prevent the materials from ever coming in contact with the water. It seems that three "barriers" will be implemented to prevent the reactor from leaking: a fuel cladding, a reactor vessel and a hull. As for those concerned with costs, I have yet to find any data on the budget...I'll keep looking and hopefully update you soon.
Interesting. Thanks for the update!
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