What do time-in/time-out records provide in re-entry control?

• A. They ensure radiation exposure limits are met
• B. They determine weather conditions
• C. They provide personnel accountability and trace who has entered or exited
• D. They schedule decon times

Answer: (C)

Time-in and time-out records are about keeping track of who goes into and out of the re-entry control area. They create an auditable, real-time roster of every person present, including when they entered and when they exited. This enables quick, accurate accountability—so you know exactly who is inside the controlled zone at any moment and can locate or account for them in an emergency, during decontamination planning, and for exposure management.

These records support safety by making it possible to perform a rapid headcount, coordinate emergency response, and trace who has entered or exited in case of incidents. They do not set or verify radiation exposure limits (that comes from dosimetry data), nor do they determine weather conditions. They also aren’t used to schedule decon times, though the presence records can inform those plans.