What are used to measure background radiation accumulated during transit or storage of dosimeters?

• A. Film Badges
• B. Area Control Dosimeters
• C. Personal Dosimeters
• D. Pocket Dosimeters

Answer: (B)

The main idea is to separate ambient background radiation from the dose a worker actually receives. When dosimeters are in transit or stored, they can pick up background radiation from the surroundings. To keep the readings accurate, devices that stay with the dosimeters and record only the environmental background are used. These are area control dosimeters. Their job is to measure the ambient background in the storage or shipping environment, and that background value is subtracted from or used to calibrate the dosimeter’s reading, ensuring the final dose reflects only the worker’s exposure.

Film badges and pocket dosimeters are meant to measure the wearer’s actual exposure—film badges over a monitoring period and pocket dosimeters for real-time personal readings—so they aren’t suited for quantifying background during transit or storage.