2007-06-14 03:29:51 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Because we don't know how to recreate nuclear fusion yet.
2007-06-14 03:33:06 · answer #1 · answered by Anonymous · 0⤊ 2⤋
Nuclear fission is pretty easy to control. You build a pile of fissionable materials, and moderate the reaction to get the temperature you want.
Nuclear fusion is much harder to control.
If a fission reaction gets too hot, the pile melts. Since the reaction depends on getting a large mass in a small space, a cubical pile has a much faster reaction than a flat puddle.
Failure to control a fusion reaction would result in an explosion, not simply a nasty mess to clean up.
2007-06-14 03:36:19 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Work is in progress to develop a working fusion reactor, but the technology isn't quite there yet. Fusion requires maintained high temperature and containment of the hot plasma and gas (gravity does this in stars). Fission is much simpler. All you have to do is bring together enough of a radioactive element and it starts to heat up all by itself because of the nuclear reactions.
2016-05-20 01:30:42 · answer #3 · answered by ? 3 · 0⤊ 0⤋
nuclear fusion requires alot of energy. It requires so much energy that makes it quite difficult to control such an enviroment. Nuclear fusion and fission both occur during the blash of an atomic bonb. The fission provides energy for the fusion. So we scientist are finding a way to make cold fusion to occur. Cold fussion is the process of fusion with very small amount of energy.
2007-06-14 03:49:57 · answer #4 · answered by lilmaninbigpants 3 · 1⤊ 0⤋
Because there are problems with fusion reactors. For now, it takes more energy to raise your hydrogen to high enough temperatures for it to fuse into helium than the energy that would be released from that small amount of fusion.
Even fusion bombs like the H-bomb have a fission bomb in them to create the temperature necessary to start the reaction.
2007-06-14 03:34:59 · answer #5 · answered by ? 5 · 1⤊ 0⤋
What? as opposed to nuclear fusion?
Nuclear fusion is still not practical as a controlled source of nuclear energy, but they're working on it.
.
2007-06-14 03:34:11 · answer #6 · answered by tlbs101 7 · 1⤊ 0⤋
Because we don't, as yet, have the technology to control a sustained fusion reaction that generates enough power to be economically viable.
Doug
2007-06-14 03:36:02 · answer #7 · answered by doug_donaghue 7 · 2⤊ 0⤋