It takes a huge amount of pressure and temperature to get started and maintain stably. Fusion experiments kept going so far are highly inefficient and take more energy to do than they produce.
The main problem is the radiation that is produced, this requires very secure safety systems and expensive engineering to make it safe. Thus a nuclear power plant is always going to be expensive to...
Nuclear fusion is when two nuclei join together and another different nucleus results. For example deuterium plus tritium (both hydrogen isotopes) fuse to give helium. The D nucleus is one proton and...