Who should be assigned responsibility for emergency shutdown in a disaster plan?

Assigning responsibility for emergency shutdown in a disaster plan is critical to ensure a swift and effective response in the event of an emergency. The correct answer emphasizes the role of the plant engineering service. This choice is appropriate because the engineering team typically has the expertise and technical knowledge required to manage the operational aspects of the plant. They understand the systems in place, the sequence of shutdown procedures, and the potential risks associated with various equipment.

The plant engineering service is trained to handle the technical specifics and can assess the condition of machinery, systems, and safety protocols in order to execute the shutdown safely. They are also familiar with the engineering controls and environmental systems that may need to be managed during an emergency, making them well-suited for this responsibility.

In contrast to this answer, the plant manager might oversee operations but may not possess the in-depth technical know-how needed for emergency shutdowns. The plant security chief focuses on safety, security, and access control rather than on technical operations, while the chairman of the board is generally not involved in day-to-day operational decisions and lacks the necessary technical expertise. Thus, the responsibility is best placed with the plant engineering service, ensuring that shutdown procedures are conducted efficiently and safely during a disaster.