Re: What ?
The only large scale reactors that have actually been built that can use thorium that I am aware of are heavy water moderated ones. Reactors of this sort are used around the world as major power producers. The main attraction of these reactors is that they can use natural uranium, and so countries can have a secure fuel supply without needing a uranium enrichment plant. Their very high neutron efficiency theoretically allows them to use thorium as fuel, but all currently use uranium fuel, as uranium is cheap enough that it isn't worth the bother to use thorium.
Canada is the leader in this field, and most of these types of reactors are based on Canadian technology. This has included experimental work on thorium fuel. India however have done the most work on using thorium fuel, as their thorium reserves are much larger than their uranium reserves and so they have the most interest in this.
There are other theoretical reactor designs which might use thorium, but so far as I am aware none have actually been built and demonstrated.
Iran are considering building heavy water reactors. However, these are precisely the type of reactors that the US are the most upset over. So, I don't think that this is the sort of solution you imagine it to be.
Biting the hand that feeds IT
