I don't think that's right. I multiplied by average lifespan in my original calculation. 3 tbsp of Uranium is about 0.85 kg. 900 kg / 0.85 kg = 1060 US consum

I don't think that's right. I multiplied by average lifespan in my original calculation. 3 tbsp of Uranium is about 0.85 kg. 900 kg / 0.85 kg = 1060 US consumer lifetimes worth of energy. Multiply by 79 (average lifespan) and you get 83,740 US consumer years worth of energy.