Under which conditions is a 24-hour notification to the Radiological Health Branch required?

• A. All of the above
• B. Total effective dose equivalent exceeding 5 rems
• C. Eye dose equivalent exceeding 15 rems
• D. A shallow dose equivalent to the skin of extremities exceeding 50 rems

Answer: (A)

Key concept: regulatory reporting thresholds require rapid notification when potential exposure crosses set limits. If the total effective dose equivalent for an individual could exceed 5 rem, or the dose to the lens of the eye could exceed 15 rem, or the shallow dose to skin or extremities could exceed 50 rem, a 24-hour report to the Radiological Health Branch is required. Any one of these conditions triggers the notification, so the option that includes all of them is correct. TEDE covers whole-body exposure, eye dose refers to the lens, and shallow dose refers to skin or extremities; these thresholds are in place to ensure timely regulatory oversight and worker safety.