Reactor dynamics refers to the study of how nuclear reactors respond to changes in conditions, such as temperature, pressure, and neutron flux. It involves understanding the behavior of the reactor core and the interactions between various components, including the fuel, coolant, and control systems. This knowledge is essential for ensuring safe and efficient operation of reactors, such as those used in nuclear power plants. Key concepts in reactor dynamics include neutron kinetics, which examines how neutrons are produced and absorbed, and thermal-hydraulics, which focuses on the heat transfer and fluid flow within the reactor. By analyzing these dynamics, engineers can predict reactor behavior during normal operation and potential accidents, enhancing safety measures and operational efficiency.