The type of energy most associated with nuclear power plants is ________.

• A. X-rays
• B. Alpha particles
• C. Gamma rays
• D. Beta particles

Answer: (C)

Radiation from nuclear processes in a power plant is dominated by high-energy photons released when unstable fission fragments decay, i.e., gamma rays. These gamma photons are highly penetrating, so they travel through shielding and through space around the plant, making them the primary energy form workers and the environment must be protected against. X-rays are also photons but are typically produced by different devices or contexts, not the reactor itself. Alpha particles have very short range and are easily stopped by skin or a sheet of material, and beta particles, while more penetrating than alpha, still aren’t the main energy hazard in the plant. So gamma rays best match the type of energy most associated with nuclear power plants.