Reactor feedback mechanisms are processes that help maintain the stability and safety of a nuclear reactor. These mechanisms involve the interaction between the reactor's power output and its physical conditions, such as temperature and neutron population. When the reactor's temperature increases, it can lead to a decrease in neutron absorption, which may reduce the reactor's power output, helping to prevent overheating. Another important aspect of feedback mechanisms is the role of control rods, which are made of materials that absorb neutrons. By adjusting the position of these control rods, operators can influence the reactor's reactivity. This allows for precise control over the reactor's power levels, ensuring safe and efficient operation.