Nuclear fusion reactors are facilities designed to replicate the process that powers the sun, where hydrogen atoms combine to form helium, releasing vast amounts of energy. This process has the potential to provide a nearly limitless source of clean energy, as it produces minimal radioactive waste compared to traditional nuclear fission reactors. In a fusion reactor, extreme temperatures and pressures are required to overcome the repulsive forces between atomic nuclei. Scientists are exploring various methods, such as magnetic confinement in devices like tokamaks and inertial confinement using lasers, to achieve the necessary conditions for sustained fusion reactions.