Final answer:
Nuclear fusion reactors are more desirable than nuclear fission reactors because they are more efficient, utilize abundant light elements, and have better control and safety measures, resulting in less radioactive waste.
Step-by-step explanation:
In addition to energy yield, nuclear fusion reactors are more desirable than nuclear fission reactors for several reasons. Firstly, fusion reactions are more efficient, releasing 3 to 4 times more energy per gram of fuel compared to fission.
Secondly, fusion reactors utilize light elements that are abundant in nature, such as hydrogen isotopes, while fission reactors rely on heavy elements like uranium that are more difficult to obtain. Thirdly, fusion reactors have the advantage of being able to be controlled, reducing concerns about meltdowns and radioactive waste.
Fusion reactions require a large amount of energy to overcome the repulsive Coulomb force and their byproducts are mainly limited to helium nuclei, making them safer and producing less radioactive waste compared to fission reactions.