These are great. Check out Tesla valves. Imagine large concrete tubular versions on the ocean floor aimed at a singular point. Then imagine they power Tesla turbine with this to spin very, very heavy large magnets that are hovering via magnetic force. The spinning magnets then generate a stable, reliable and incredibly efficient power source. Once ramped up, a very small Tesla turbine could keep an incredibly heavy magnet spinning at a high rpm. I think that's what Tesla envisioned... to some extent. Massive underground salt water battery banks can be used to store for peak hour demand and keep a stable grid. It's a good system that can be made with very few moving parts. Nothing scientifically exotic, at all. Very cheap, too, as well as long lasting. Can work at nearly any scale. Energy is the last frontier of corruption. They always throw the politicians to the dogs and come out smelling like a rose. It is possible uranium is kept out of everyone's hands because individuals could easily make Sterling engines on any property without a risk or problem. Uranium pellets can be coated with a layer of ceramics and a layer of grapheme to make meltdowns impossible, but still be able to boil water and spin a turbine... also easily scalable and also easy to clean.