When entering and exiting the Protected Area, what is the first step employees must undergo?

The correct answer is that employees must undergo processing through metal and explosive detectors when entering and exiting the Protected Area. This step is crucial for maintaining security in sensitive facilities. These detectors serve as a frontline defense against unauthorized items or individuals, helping to ensure that no dangerous materials are brought into the area that could pose a risk to safety and security.

By using metal and explosive detectors, facilities can quickly screen individuals for potentially harmful objects. This process is an essential part of the security protocol designed to protect employees, sensitive information, and vital equipment from any threats. The emphasis on detection over other access procedures illustrates the priority placed on physical security measures in nuclear environments, where safety is paramount.

While personal identification verification is also important, it typically follows the screening for physical threats, as the immediate concern is ensuring that no harmful items are introduced into the facility. Safety training courses and written requests are important administrative processes but do not directly relate to the immediate security screening that guards the facility's entrance.