Shipyard constructed floating nuclear power stations are a truly excellent idea. You get economies of mass production and scale in the factory to reduce costs and speed up timelines, and you get extra safety from being in coolant, decoupled from earthquakes, and in deep enough water to not have tsunamis. You have more weather to worry about, and piracy, but in the balance shipyard nuclear is one of the most intriguing ways to really decarbonize the planet at scale quickly.

In the US, Offshore Power Systems tried this in the 1970s. They hired 1000 people, formed a joint venture with Newport News, bought and installed the world's largest gantry crane at their construction yard in Jacksonville, FL, and got a license to construct 8 gigawatt scale floating reactors from the Nuclear Regulatory Commission. Wild story [1].

[1] https://whatisnuclear.com/blog/2020-01-26-offshore-power-sys...

That's a damn good idea actually. Though, not so practical in Arctic waters.