Which of the following controls is not typically used for non-ionizing radiation safety?

• A. Shielding
• B. Administrative controls
• C. Exposure limits
• D. Dosimetry

Answer: (D)

In non-ionizing radiation safety, the controls you act on to reduce risk are engineering measures like shielding, administrative controls that govern how work is performed, and exposure limits that set clear thresholds for safe exposure. Shielding physically blocks or attenuates the radiation reaching workers, administrative controls manage work practices and time spent near the source, and exposure limits provide a benchmark that tells you when protective action is needed.

Dosimetry, on the other hand, is about measuring the amount of exposure that has occurred. It’s a monitoring or assessment tool, not a preventive measure that directly reduces exposure. While it’s useful for verifying whether exposure stays within allowed limits, it does not by itself decrease the actual exposure like shielding does or change how tasks are performed like administrative controls. Therefore, dosimetry is not typically used as a primary control for non-ionizing radiation safety.