A new test of nuclear propellant fuel under space-like conditions has been hailed as a success by NASA and General Atomics ...

The best, in fact, the only, candidate for this is the Nuclear Thermal Propulsion ... to be two-to-three times more efficient than conventional chemical rocket engines. We are excited to continue ...

and then an enclosure is made for the stove to provide insulation and improve its efficiency. The rocket stove was able to effortlessly heat 80 liters of water to 70°C in a little over an hour ...