Most power grids are on-demand, pulling from a variety of resources including nuclear. However, lots of electricity is still produced by fossil fuels in the US. Chances are high that you are not getting pure nuclear from a power adapter. Besides, that would still be charging a lithium-ion battery, which is a completely different way to produce electricity through a chemical mean, and comes with a litany of issues(degradation, flammability, toxicity, scarcity, etc.). A truly nuclear powered arduboy would probably have to use some sort of photo-electrics, phosphors, nuclear material, and a static power-saving device like very sensitive high precision capacitors, as opposed to the degrading chemical storage of most traditional and popular batteries.
But again, wall power is definitely not 100% nuclear and are powered by lots of dirty generators. For example, Texas (where I currently reside) produces and consumes more electricity than any other state. The power grid is comprised of 47% natural gas, 20% coal, 20% wind, 10% nuclear, and 1% solar. Source here.
zoom out to the entire United States and the nuclear source actually decreases by a little, at 9% of all energy produced. Petroleum being the primary source at 35%, followed by natural gas at 34%, “renewable energy” at 12%, coal at 10%. Source.
So if you’re in Texas like me, charging any device to 100% from your wall wart will result in 10% charged by nuclear at best. Of course this isnt how grids work in practice, but it’s a good way to think about it from a consumerist perspective.
Nuclear power grids are a big part of the future. But Chances are they’re not the main producer of electricity where you live.
I hope I’ve been able to educate you a little bit on energy consumption! There’s a big big misconception right now that we’re mostly nuclear, and unfortunately that is very rarely the case for any area. It would be awesome if we could do that today, but in practice, very very few people actually can. So what’s wrong about it is that chances are your wall actually isn’t powered much by nuclear, if at all.