It's good to know that there are other people who are great promoters of nuclear power (I am a huge fan), but you're not reading your sources very well (the last article you linked to put the cost of uranium as nuclear fuel at 0.5c/kWh at a spot price of $53/kg), your math is full or errors and you clearly haven't researched exactly what goes into taking uranium from the ground and using it to produce power, or the related fields, such as energy production and consumption in general, mineral exploration and mining, or waste management. You fail to take into account production levels (which are currently only about 65% of consumption), an increase in uranium demand (based on new and proposed build will double by 2020), increased costs of actual mining and transportation of the resource just to name a few, or the effect of mining and extracting ever bit of uranium from the planet. There are limits to fuel efficiencies increases and as well to the economic viability of nuclear power. This is why it's a good idea to invest in new technologies now, such as fusion (the whole reason this discussion began). Sure we can take every last particle of uranium out of the Earth's crust and ocean's but I think we can spend our time, energy and effort doing something more productive. Uranium and thorium are finite resources and no amount of water extraction will make them not so. We once believed oil would last us forever and we have come to realize that this is not so. Let's not make the same mistake by promoting unsubstantiated and irrational ideas that nuclear (fission) will last us for half a trillion years when very educated and informed people who are actual experts put the number at 1000 years. As a nuclear enthusiast, I'm fine with the 1000 years because I hope that by then we have something better that nuclear (fission) to get our power from.