We hear a lot about the depletion of supplies of fossil fuels, however it is not mentioned that there is also a potential problem with the supply of uranium: "There is currently a gap in the amount of uranium being mined and the amount of uranium being consumed," states Nuclear Energy Corporation of South Africa (Necsa) CEO Rob Adam1.  This would potentially be ok if it did not look like we are approaching a uranium peak. The peak in supplies of uranium seems likely to arrive sometime between 2030 and 2040 with uranium being almost totally gone by 2070 or 2120 at the latest. It is the peak that matters, as after this point supply will not be able to keep up with demand. If you take into account that nuclear energy produces 16% of world electricity, and less than 5% primary energy supply, it seems impossible to me for nuclear energy with current technology to ever satisfy a big part of the world's energy demand2. It means that nuclear power is not a sustainable base which we should be looking to be dependent on.  1 Matthew Hill, 'Global uranium production will need to double by 2015 to catch up with demand', Mining Weekly, 25th June 2007, 2 Uranium resources and nuclear energy, Energy watch group, December 2006, p.5.,