@dyslexia,
Define "organic".
"Organic chemistry" generally means chemistry with hydrocarbons. In that sense, the answer is "no." Nuclear power has nothing to do with hydrocarbons.
If by "organic" you mean "green" or "good for the environment", then the answer is "it depends on your point of view". Do you prefer soot as your pollutant, or do you prefer to store nuclear waste indefinitely?
Nuclear power is dependable and safe, if that is what you are asking.