I have always wondered about these.
I am not one to use FAQ's or walkthroughs, but i have not been able to figure this one out on my own. I know the Uranium bars make you weaker sometimes by carrying them, but is there any purpose to them? Since they are so few and far between in the game, and are also well hidden, i would be surprised if there was nowhere where they could make you some money or finish a quest...
does anyone know?