I documented this previously. Here's a new presentation on the subject of: liquid-fluoride thorium reactor
Quote from the full report:
The uranium that makes conventional nuclear power possible has a number of disadvantages. For one thing, uranium reactors generate large quantities of waste – some of which remains dangerous for millenia and a small proportion of which can be used to make nuclear weapons. A second issue is that uranium is a comparatively scarce material, which exists in significant quantities in a small number of countries.
For both of these reasons, a growing number of scientists and energy experts believe that the world should investigate the possibility of switching from uranium to thorium as its main nuclear fuel. Compared to uranium, thorium is far more abundant as well as much more energy-dense – a person’s lifetime energy needs could be held in one hand. In addition, the waste products generated by thorium are virtually impossible to turn into the plutonium needed for nuclear weapons production – and they remain dangerous for hundred of years rather than thousands.
There are a number of different ways to use thorium to produce electricity. In Manchester, Kirk Sorensen made the case for liquid-fluoride reactors. This technology was developed by the US military in the 1950s and 1960s and was shown to have many benefits. For example, reactors of this type can be both small and massively productive. Despite its early promise, research into liquid-fluoride thorium reactors was abandoned – the most likely reason being that the technology offered no potential for producing nuclear weapons.