one of the principle claims of msr reactors is that they will produce electricity at a fraction of the cost of lowest cost coal. because the resource is cheap and because they don’t require all they layers of protection that a light water reactor requires.
Can you link that claim?
Molten Salt Reactors
http://www.world-nuclear.org/info/Current-and-Future-Generation/Molten-Salt-Reactors/
Updated 22 August 2015
The total levelized cost of electricity from the largest is projected to be competitive with natural gas.