What are the characteristics of the most common and first film badge?

• A. Expensive, hard to handle, difficult to process, accurate
• B. Inexpensive, easy to handle, easy to process, accurate but couldn’t be used more than once
• C. Complex and hard to process, accurate but reusable
• D. Inexpensive, difficult to handle, slow to process, inaccurate

Answer: (B)

Understanding the practical traits of the earliest film badge dosimeter. This device uses exposed photographic film inside a light-tight holder; when exposed to radiation, the film darkens in proportion to the dose, and reading it is done by developing the film and measuring its density. It’s inexpensive to manufacture, easy to handle in the field, and easy to process since it only needs standard film development to obtain a dose reading. It provides accurate results within its calibration range for occupational exposure. The key limitation is that the film is used for a monitoring period and isn’t reusable—the same film isn’t reset for another period, so a new film is required for continued monitoring. This combination—low cost, simplicity, straightforward processing, accuracy, but single-use—fits the described characteristics best.