It is clear that we can no longer depend on fossil fuels for our energy needs. It is doubtful whether renewable sources can fill the gap. Nuclear power is apparently the only way to avoid reverting to the middle ages. But conventional nuclear power has problems with safety, with long term waste storage, and with the dangers of proliferation. Even if technical solutions are found, the public is negative and sceptical. Accelerator Driven Thorium reactors provide an alternative to the conventional Uranium/Plutonium system in which Thorium is converted to Uranium with the help of spallation neutrons from an accelerator. This is manifestly safe, as the reactor is always subcritical and if the accelerator is switched off the reaction stops. There is no long term waste problem as the long-lived minor actinides are not produced - indeed this system can be used to consume waste from conventional nuclear power plants by transmutation. And the
manufacture of weapons is certainly very difficult and perhaps impossible. The talk will discuss these points in detail, and present the current state of Thorium ADSR developments in the UK and worldwide.