"The power of the atom, now in your hands. And with only a 9% chance of meltdown!"
Nuclear plants are the tier 8 generator for the Land industry, and produce Harbours, the tier 7 generator for the land industry. The base cost of one nuclear plant is 10 T Harbours, 100 CCC Land, and 2 Comrades. Geri Springer Bouvier speeds up and automates this industry, and is unlocked at Rank 51.
The first rank with Nuclear Plant mission is Rank 50.