I'm not, as yet, prepared to do a back-flip on Nuclear power. However the proposals behind reactors powered by Thorium, rather than Uranium, are quite compelling. Here's a summary of the advantages:
- The radioactive waste created by Thorium reactors decays over a much shorter time period - 200 years as opposed to many thousands by "traditional" nuclear reactors.
- Nuclear waste from "traditional" reactors can be inserted into a Thorium reactor and turned into regular Thorium radioactive waste - this means that Thorium reactors can permanently remove the radioactive waste stored around the world from traditional nuclear reactors.
- Thorium can be used to create nuclear bombs (the US tested a Thorium bomb back in the 1950s) but it is much more difficult to achieve and cannot be stored for very long (unlike Plutonium bombs).
- A melt-down is impossible in a Thorium reactor.
- Thorium is more widely available than uranium.
- Thorium does not have to go through many secondary processes to use it in a reactor, making it cheaper to use.
- Any nation with a Thorium reactor has the ability to create weaponized Thorium. While it is not as "good" as plutonium it nevertheless increases the potential for nuclear weapons proliferation. Having Thorium reactors in the US, UK, Europe, Canada and other nations might seem acceptable... but what about Thorium reactors in third world nations? Would we trust Zimbabwe or Saudi Arabia or North Korea with Thorium reactors?
- If a Thorium reactor is destroyed with conventional explosives (by terrorists or by an air force), what will the result be? Will a Chernobyl like radioactive cloud be released?
- if a nation has a Thorium reactor, will they also, by proxy, have the technology to create and weaponize Plutonium?
- Can radioactive waste from a Thorium reactor be used in a "dirty bomb"?