Disadvantages of Nuclear Energy One of the reasons that nuclear energy falls under fire so frequently is due to the many disadvantages it brings. Uranium, water pollution, waste, leaks, and reaction failures. Raw Material Uranium is used in the process of fission because it's a naturally unstable element. Nuclear power does not produce CO2 emissions. Nuclear power plants produce minimal carbon output. This is a big pro over alternative causes of power like fossil gases, which generate enormous amounts of carbon into the air, resulting in global warming. As a result, the healthier, the less a kind of power is fossil and carbon production. 5) Nuclear energy saves lives. This thermal energy heats water into steam. First disadvantage is nuclear waste. The hindrance in the growth of nuclear energy is due to many complex reasons, and a major component is the nuclear waste These are the advantages and disadvantages of nuclear energy to review when evaluating this subject. Advocates. The main advantage to nuclear energy is that is it relatively low-cost and consistently runs on its full potential, making it the ideal source to power national grids. [2,4] Disadvantages of Nuclear Power The hindrance in the growth of nuclear energy is due to many complex reasons, and a major component is the nuclear waste.