In regards to nuclear power, it's hinted at that Ytterban could make a breakthrough in that realm. Radioactivity is a known field among the Technomancers, and of course there have been efforts to make some use of the materials. Whether or not those efforts are an actual thing, I'll respect GM's wishes regarding the matter. Regardless, there would not be any kind of weaponization of the technology, even if nuclear power was a thing.