Which of the following systems is designed to prevent operational hazards?

Safety shutdown systems are specifically designed to prevent operational hazards in various processes. These systems function by detecting unsafe conditions and triggering actions to mitigate those risks, effectively ensuring that the operations do not lead to accidents or unsafe situations.

They are crucial in industries where potentially dangerous processes occur, such as chemical manufacturing, oil and gas, and power generation. The role of these systems is to provide an additional layer of protection beyond normal operational controls, shutting down processes or isolating sections of a system when predetermined critical parameters are exceeded.

Control loop systems, feedback control systems, and regulatory control systems primarily focus on maintaining the desired performance and stability of a process rather than addressing safety hazards. These types of systems manage variables like temperature, pressure, or flow rates within safe operational limits, but they do not inherently provide safety functionalities like the safety shutdown systems do. Thus, the focus of the safety shutdown systems on hazard prevention makes them the correct choice in this context.