What steps should be taken during an emergency shutdown?

An emergency shutdown (ESD) is a critical procedure to safely halt operations in response to an immediate threat to personnel, equipment, or the environment. The specific steps may vary based on the plant design and emergency situation, but generally include these actions: First, activate the emergency shutdown system. This can be done manually by pressing an ESD button or automatically by the plant's safety system in response to a detected hazard, such as high pressure, fire, or gas leak. Activating the ESD system initiates a pre-programmed sequence of actions to shut down the plant in a controlled manner. Second, isolate the fuel supply to the boiler. This i....