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A US startup wants to drop a full nuclear reactor a mile down a 30-inch hole and let the water above it supply the pressure while billions of tons of rock replace the containment dome. One hole would make 15 megawatts; 100 on one site would add up to 1.5 gigawatts.
The big concrete dome is the part of a nuclear plant almost anyone can draw from memory. It is there for a reason. A pressurized water reactor runs hot water
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