From previous threads on the subject I would believe there are quite few supporters around here. Should you ever start a ping list on it or something closely related make sure to add me.
I have gathered that there are a few of us who are advocates.
I guess there are no influential real-world advocates, since anyone in favor of doing anything with radioactivity is branded by the left as an undesirable worthy of brainwashing/reprogramming/indoctrination.