3h16m38s02f Why Liquid-Fuel Reactors? Because Solid-Fuel Burn-up and Reprocessing Issues - TR2016a
Channel: Thorium Remix
Date: 09/05/2017

http://ThoriumRemix.com/ So if molten salt pebble-bed reactors can be passively safe and less expensive, why is every single organization shown here investigating, if not dedicating themselves entirely, to the pursuit of liquid fuel?
There are supreme advantages of dissolving the fuel and fission products in the fluorides, because you can add and subtract at will. Solid stuff is always going to be expensive fabrication.
And what do you do with spent pebbles?
They have an inner carbon core surrounded by a TRISO matrix, surrounded by an outer layer of graphite. Every time we de-fuel a pebble you can actually assay these pebbles using gamma-ray spectroscopy to discern what the burn up is of this pebble, and whether it should be placed back into the core, or whether it should be putt in storage.
Then will you do with the spent pebbles? There was that much more manufacturing and engineering and thought going into these pebbles, but ultimately, from a macroscopic, or 50,000 foot view, you still have the same waste problem. Except its now in a far more engineered and therefore much more difficult medium in which to go extract that waste and processes it.