A 1972 Atomic Energy Commission patent for a machine that drills bore holes and tunnels by melting rock. The patent says the heat source can be electrical or nuclear, and for deep drilling is preferably a nuclear reactor.
The heat source can be electrical or nuclear but for deep drilling is preferably a nuclear reactor.
Abstract, PDF p. 1
A 1972 Atomic Energy Commission patent for a machine that drills bore holes and tunnels by melting rock. The patent says the heat source can be electrical or nuclear, and for deep drilling is preferably a nuclear reactor.