Where do you wear the dosimeter?

• A. On the ankle
• B. On the head
• C. Front of body, between neck and waist, no more than hand width apart, with SRD & DLR facing from body
• D. In a pocket

Answer: (C)

The dosimeter is worn on the front of the body, between the neck and waist, no more than a hand-width apart, with the sensing surface oriented away from the body. This placement keeps the measurement representative of the worker’s whole-body external exposure, since the torso is the central region most exposed during work. Keeping the two dosimeters close together ensures they are both sampling the same radiation field and not biased by being in different locations. Facing outward from the body prevents the body itself from shielding the sensor, so the reading accurately reflects the external dose being received.

Wearing it on the ankle, on the head, or in a pocket would not provide a reliable measure of overall body dose: these sites can be shaded or exposed differently by clothing or body parts and can misrepresent the true exposure.