Yes Jonathan, this indeed an excellent, very easy to use tool, well done - there is an excellent help page as well!

Others, test it out for yourselves - try France as an example and see how much oil,gas and coal they produce themselves - if you were them would you have gone for nuclear in a big way?

It will be interesting to see how France fares with meeting their mandatory 20% targets for reducing CO2 emissions by 2020, since nuclear emits lots of CO2 during initial power station build and decommissioning - guess what they are soon going to have to do in a big way?

Quantify lifetime CO2 emissions of nuclear plant relative to coal plant. Scale by power produced.