This is not merely a theoretical topic. A Molten Salt Reactor of the LFTR type was run for 5 years at Oak Ridge National Labs. It worked and has much more tractable contamination than fossil fuels with $1 million times the energy density. We have enough Thorium in the US to run inexpensive & energy independent for 1,000 years. Many countries (China, Russia, France Japan, India) are working from our design and will "own" it before we figure out that our current path is unsafe and unsustainable. Here are some metrics to help compare these sources of energy. As you know China brings a new coal fired power plant on line each week. Thorium provides the Third World a feasible strategy to provide their citizenry a decent productive lifestyle in our lifetime. This is a practical solution for reducing poverty without making the world a toxic waste dump.
To generate electricity for a city of 1 million people for 1 year:
1) Mine 3,200,000 tonnes of coal - emit 8,500,000 tonnes of greenhouse gases and particulates - landfill 900,000 cubic metres of toxic/radioactive fly-ash.
2) Mine 50,000 tonnes of uranium ore - emit no greenhouse gases - produce 24 tonnes of radiotoxic 'waste'.
3) Mine 50 tonnes of equivalent thorium ore - emit no greenhouse gases - produce 0.8 tonnes of short lived radiotoxic 'waste'.
TED
Google
Thorium 2hr
http://www.singularityweblog.com/the-thorium-dream-full-documentary-film/ Dream
I just returned from the Thorium conference in Chicago (TEAC4). Great atttendees, even a baroness from Britain's House of Lords was there to learn and advance the movement.