How should a typical personal radiation monitor be worn with respect to a lead apron?

How should a typical personal radiation monitor be worn with respect to a lead apron?

• A. Outside the lead apron
• B. In a radiation-free area
• C. Under the lead apron
• D. Under the lead apron, at waist level

Answer: (A)

When monitoring occupational exposure, the device should measure the dose that could reach unshielded tissues. The lead apron protects the torso, but areas like the head and neck remain exposed. Placing the dosimeter outside the apron ensures it records the actual exposure from scatter and leakage that the worker’s unprotected tissues would receive. If the monitor were worn under the apron, the lead would attenuate the reading, giving an artificially low measurement that doesn’t reflect true risk. Therefore, the usual practice is to wear the dosimeter outside the lead apron.

When monitoring occupational exposure, the device should measure the dose that could reach unshielded tissues. The lead apron protects the torso, but areas like the head and neck remain exposed. Placing the dosimeter outside the apron ensures it records the actual exposure from scatter and leakage that the worker’s unprotected tissues would receive. If the monitor were worn under the apron, the lead would attenuate the reading, giving an artificially low measurement that doesn’t reflect true risk. Therefore, the usual practice is to wear the dosimeter outside the lead apron.