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Everyone sings their praises, but what engineering challenges are there and are those engineering challenges large enough to discourage their development/adoption?
The biggest thing I have found is that the salt solution for Thorium reactors is quite corrosive and that is challenging to contain.
It generally sounds really promising - even the Wiki page for thorium MSR sings its praises.
Why wouldn't it work? Why isn't the world throwing shit-loads of money at this? Is China enlightened or is this some kind of meme-ware technology they fell for (or are trying to convince others to waste their money on)?