Actually there seem to be some thorium reactors already in...

Actually there seem to be some thorium reactors already in existance - just check on wiki -

extract:

Existing thorium energy projectsIndia's Kakrapar-1 reactor is the world's first reactor which uses thorium rather than depleted uranium to achieve power flattening across the reactor core.[34] India, which has about 25% of the world's thorium reserves, is developing a 300 MW prototype of a thorium-based Advanced Heavy Water Reactor (AHWR). The prototype is expected to be fully operational by 2011, following which five more reactors will be constructed.[35] Considered to be a global leader in thorium-based fuel, India's new thorium reactor is a fast-breeder reactor and uses a plutonium core rather than an accelerator to produce neutrons. As accelerator-based systems can operate at sub-criticality they could be developed too, but that would require more research.[36] India currently envisages meeting 30% of its electricity demand through thorium-based reactors by 2050.[37]

At the 2011 annual conference of the Chinese Academy of Sciences it was announced that "China has initiated a research and development project in thorium molten-salt reactor technology." [42]

full link here -- http://en.wikipedia.org/wiki/Thorium