This is an official US government illustration from back in the day, the 40s and 50s, for a reactor on the moon to power a military moon base.
There is some evidence, much of it discovered by the late, great Ron Schmidt, a.k.a. zorgon, that there may actually be one or more of these on the moon as I type this. No, really, there is. It would be buried, though, in reality, for protection from meteorites, both micro and not. For me, a lot of little loose ends would finally get tied.