http://hyperphysics.phy-astr.gsu.edu/hbase/nucene/fasbre.htmlUnder appropriate operating conditions, the neutrons given off by fission reactions can "breed" more fuel from otherwise non-fissionable isotopes. The most common breeding reaction is that of plutonium-239 from non-fissionable uranium-238. The term "fast breeder" refers to the types of configurations which can actually produce more fissionable fuel than they use, such as the LMFBR. This scenario is possible because the non-fissionable uranium-238 is 140 times more abundant than the fissionable U-235 and can be efficiently converted into Pu-239 by the neutrons from a fission chain reaction.
France has made the largest implementation of breeder reactors with its large Super-Phenix reactor and an intermediate scale reactor (BN-600) on the Caspian Sea for electric power and desalinization.
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Nuclear Waste and Breeder Reactors - Myth and PromiseIn my earlier articles on nuclear power, I reviewed how fissile Uranium-235 drives a nuclear reactor, and how Uranium-238 participates in the process by transforming into Plutonium-239, which is fissile like Uranium-235. This phenomenon of nuclear physics lies at the heart of a conceptual blueprint by which the United States once and for all can end its energy dependence on fossil fuels and the unstable Third World nations who export petroleum.
Two significant obstacles stand in the way of an energy-independent United States: (1) Finding a solution to the immense amounts of dangerous and highly-radioactive spent reactor fuel already on hand, and (2) Implementing reactor designs that generate electricity while creating more useful nuclear fuel.
In order to see how this can be done, it's first necessary to review some basic physics: Plutonium-239 produces significantly more energy than Uranium-235. And the process continues to produce the additional isotopes Plutonium-240 and 241 and 242. This raises an interesting question.
Can we take these fuel rods that contain all this Plutonium, separate out the Plutonium and whatever Uranium was not used, and make more fuel rods? You bet. In fact, we actually end up with more fuel after the process than what we started with. Why is this not being done?
Plutonium is used in atomic bombs - the fact that it's pure Plutonium-239 that makes an atomic bomb work, and not the other three isotopes, apparently didn't matter, because in 1977 President Jimmy Carter signed an executive order that banned the reprocessing of nuclear fuel in the United States. The rationale was that the Plutonium could possibly be stolen, and terrorists might be able to use it to make atomic bombs.
Never mind that in the real world, it is essentially impossible to separate out the Plutonium-239 from the other isotopes in sufficient purity to use it for bomb making. The British tried it, the Russians tried it, the French tried it, and we tried it, but nobody did it very well, even though we had the best scientists and all the money in the world to throw at it.
If you try to make a bomb with such a mixture of Plutonium isotopes, forget about it - it won't work, ever. We're talking about the laws of physics, Greenpeace notwithstanding. Unless you have pure Plutonium-239, your bomb will fizzle. So throwing away all that valuable nuclear fuel to prevent terrorists from making a bomb that won't work anyway is just plain dumb.
http://www.argee.net/DefenseWatch/Nuclear%20Waste%20and%20Breeder%20Reactors.htm* * * * * * * * * *
There is more B.S. about the evils of nuclear power than generated by the bu$h administration about why the rich not paying taxes are a good thing.