The proposal is for a fission surface power system, and the goal is to have a flight system, lander and reactor ready to launch by 2026.https://www.cnbc.com/2020/11/15/why-nasa-wants-to-put-a-nuclear-power-plant-on-the-moon.html
The goal, apparently, is to generate 10 Kw, or about enough to power “five to eight large households.”
Um. That’s not really enough for an actual lunar base. Try again?