WordNet
thermal reactor
n. a nuclear reactor in which nuclear fissions are caused by neutrons that are slowed down by a moderator [ant: fast reactor]
Usage examples of "thermal reactor".
We were only involved in the design and construction of the photovoltaic array and thermal reactor.
That means it uses a nuclear thermal reactor to heat an indigenous propellant gas as a reaction mass.
That means it uses a nuclear thermal reactor to heat an indi.
I felt like reminding them that without the help of my venerable race by now they would not have developed much more than a ridiculous thermal reactor for their space propulsion.