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Fusion reactors only work for a few seconds because it is extremely difficult to create and sustain the high temperatures and pressures required for fusion to occur. These conditions are necessary for the nuclei of atoms to fuse together, releasing large amounts of energy. However, it is challenging to contain and control this energy for a sustained period of time, resulting in short bursts of fusion reactions.
Scientists are constantly researching and developing new technologies and methods to improve the efficiency and sustainability of fusion reactions. However, it is a complex and challenging process, and it may take many more years of research and experimentation before fusion reactors can be made to work for longer periods of time.
The main challenges in creating a sustained fusion reaction include finding ways to contain and control the extremely high temperatures and pressures, developing materials that can withstand these conditions, and finding ways to extract and utilize the energy produced by fusion reactions.
Fusion reactions produce very little radioactive waste compared to other forms of nuclear energy. However, there are still potential risks and dangers associated with fusion reactors, such as the possibility of accidents or malfunctions, and the need for proper disposal of any radioactive materials produced.
Fusion has the potential to be a much cleaner and more sustainable form of energy production compared to fossil fuels and current nuclear power plants. It produces significantly less waste and does not emit greenhouse gases. However, it is still a complex and expensive process, and it may take many more years of research and development before it can become a viable source of energy on a large scale.