Simulations of nuclear reactions are computer-based models that help scientists understand how atomic nuclei interact under various conditions. These simulations can predict outcomes of reactions, such as fusion and fission, by using mathematical equations and physical laws. They are essential for research in fields like nuclear physics and energy production. By simulating nuclear reactions, researchers can explore scenarios that are difficult or impossible to recreate in a laboratory. This includes studying the behavior of nuclear reactors, the formation of elements in stars, and the effects of radiation on materials. Such insights contribute to advancements in energy technology and safety protocols.