What are the two common legal records of dose in the nuclear industry?

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

Answer: (B)

Occupational dose is tracked using personal dosimeters that form the formal, verifiable dose record required by regulators. The two most common types used for this purpose are Thermoluminescent Dosimeters and Optically Stimulated Luminescent Dosimeters.

Thermoluminescent dosimeters store energy when exposed to radiation in a crystal lattice; when heated, they release that energy as light, and the light amount correlates with the absorbed dose. This readout goes into the formal dose record after processing by a dosimetry service. Optically Stimulated Luminescent dosimeters store energy in doped aluminum oxide crystals and emit light when stimulated by a specific light source; the emitted light is measured to determine the dose. OSLDs offer high sensitivity, a wide dose range, and the ability to re-read, making them a robust and common choice for official dose documentation.

Other options may measure real-time exposure or be older technologies, but they do not serve as the standard, legal dose record in the same way.