Cool. Looks like it´s completely theoretical at the moment though, so probably needs some R&D. I am sure it will work though. There are many ways of building nuclear power plants, and most if not all of them are perfectly suited to ocean use (no hindering regulation, lots of water available for cooling).
I am guessing seasteading will induce an explosion (no pun intended) of nuclear power technology, to the benefit of all mankind.
I discussed this project with some of my brother’s in-laws (both are nuclear engineers) and they mentioned a few things:
1. The fuel is really only a very small part of the cost of a nuclear reactor. 2. Since only a small part of the core of this reactor is producing power at any one time, the reactor might not be economically viable. 3. A lot of things get done at a reactor during the refueling outage – not just refueling. Those things (routine maintenance) still will have to be done, so you will still have to shut down the reactor periodically anyway.
Just things to think about with any nuclear design.