Which pair of devices are commonly used as legal records of dose in the nuclear industry?

• A. Geiger counter readings and alarm logs.
• B. Film badge and pocket dosimeter.
• C. Thermoluminescent Dosimeter (TLD) and Optically Stimulated Luminescent Dosimeter (OSLD).
• D. Self-Reading Dosimeter (SRD) and Electronic Alarming Dosimeter (EAD).

Answer: (C)

Recording dose for regulatory purposes relies on personal dosimeters that preserve an auditable history of exposure. Thermoluminescent dosimeters and optically stimulated luminescent dosimeters are designed as passive, worn devices that accumulate dose information over a monitoring period and yield an integrated dose when read by approved facilities. Their readings are stable, can be archived, and are widely accepted by authorities as the official dose record for a worker. In contrast, devices that provide immediate dose readings or monitor ambient radiation—such as Geiger counters with alarm logs, film badges, pocket dosimeters, or real-time electronic dosimeters—either measure current radiation levels rather than a cumulative personal dose, or their data aren’t as easily stored and verified as a legal dose record. Among the options, the combination of TLD and OSLD best fits the role of commonly used legal dose records, combining precise dose measurement with durable, auditable archival capability.