[frign]

LFTR's are very safe, but the current technical challenge is actually building containments that can handle heat + flouride salts. The tritium formed during the nuclear reactions is also challenging to handle, as it passes through those walls via diffusion. Until we find materials that can cope with these situations, it will remain a dream. Advances in nanotechnology will bring us further here, I totally agree with you though that LFTR's by far get too little attention, as today's nanotechnology could solve it for us.

The waste coming out of LFTR's has to be stored ~400 years (which is actually a sane timespan and it's easy to find places underground that stay stable for 400 years). Another bonus is the fact that Thorium is much easier to find than Uranium, and that an LFTR can be built more or less failsafe.