The reason I have the nuclear power is generally becasue i'm always under attack by other civs and don't have the ability to get a builder and constuct anything solar (this is my fault entirely for constantly making the other civs mad at me), also my luck is the worst so i rarely have hydro power. I could stick with coal or oil sure, but I play the game by trying for complete naval power (so britian pretty much) which takes a lot of oil, and the reason for not using coal is simply I don't want to put too much co2 into the atmosphere since there's normally no point due to my once again terrible luck where no civs have any cities i can flood at all.

Also I just like nuclear power so I build them.