Fusion has no waste (well, radioactive waste) other than helium by-product. hardly dangerous. It's done by combining two heavy hydrogen nuclei together to form helium. It's extreamly difficult to do, and hence we have no fully working, controllable reactors yet. As I said, the French are investing so much money in this and are well ahead than any other country.
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i watched a show about that
the problem was they couldn't make a control rode that could stand the head
They don't use control rods, it's a completely different type of reactor alltogether. They have a number of problems, as follows -
* It's awful difficult to inject fuel (the heavy hydrogen) into the reactor without it cooling the reaction and stalling it. Pretty difficult considering that you need to have a fuel source. The last time I studied it (Im a at uni, and I used this as my specialist topic, such a geek
) they were working on using lithium pelets (the lithium was a extra source of neutrons and protons and a light element) laden with heavy hydrogen and firing them into the reaction chamber. The chamber is like a rather large hollow doughnut.
* The heat, because it's a plasma, and at temperatures far greater than fission - the same as the sun, tends to destroy the reactor chambers lining. With fusion, unlike Fission, because it's an ionised gas you don't actually need to boil water to turn turbines to generate the electricity, it's produces an electromagnetic field and hence can be used as part of a huge transformer, like a primery coil. This means the linining of the chamber must be kept safe and must be able to cope with the extream temperature. In reality, it is difficult choosing the right materials, especially when trying to allow the magnetic field to flow through the reactor walls. so, they've tried developing techniques to control the direction of the Plasma and keep it from touching the vessel walls.
* Trying to kickstart the reaction uses immense amounts of energy in creating the initial kickstarting, reacting plasma. This has led to recent, "successful" reactions actually consuming more energy that what ends up being produced.
Anyway, lets just hope that the French, with their 36hour working week manage to pull it off in time for oil running out. They've 20 odd years left. fingers crossed!
