They plan on operating and controlling the reactor remotely from the surface.
Company founder Muller says if an earthquake ever disrupted the site, "you seal it off at the bottom of the borehole, plug up the borehole, and you have your waste in safe disposal."
For waste management, the company "is eyeing deep geological disposal in the very borehole systems they deploy for their reactors."
"The company claims it can cut overall costs by 70 to 80 percent compared with full-scale nuclear plants."
Long-time Slashdot reader jenningsthecat shared this article from IEEE Spectrum In short "The same oil and gas drilling techniques that reliably reach kilometer-deep wells can be adapted to host nuclear reactors..." the article points out. Their design would also streamline construction, since "Locating the reactors under a deep water column subjects them to roughly 160 atmospheres of pressure — the same conditions maintained inside a conventional nuclear reactor — which forms a natural seal to keep any radioactive coolant or steam contained at depth, preventing leaks from reaching the surface."Other interesting points from the article:
"Among its competition are projects like TerraPower's Natrium, notes the tech news site Hackaday, saying TerraPower's fast neutron reactors "are already under construction and offer much more power per reactor, along with Natrium in particular also providing built-in grid-level storage.
"One thing is definitely for certain..." they add. "The commercial power sector in the US has stopped being mind-numbingly boring."