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Which type of radiation monitoring device does NOT measure personnel cumulative radiation exposure?

  1. Film badge

  2. Thermoluminescent dosimeter badge

  3. Optically stimulated luminescence badge

  4. Pocket ion chamber

The correct answer is: Pocket ion chamber

The pocket ion chamber is the correct choice because it is designed for immediate readings of radiation exposure rather than providing a cumulative total over time. This device is often used for real-time monitoring, allowing personnel to gauge their exposure at any given moment, but it does not retain data for long-term tracking. In contrast, film badges, thermoluminescent dosimeter badges, and optically stimulated luminescence badges all serve to assess cumulative exposure over time. These devices store information that can be analyzed later to determine the total amount of radiation a person has been exposed to, often over a defined monitoring period. Film badges use photographic film that darkens in response to radiation, while thermoluminescent dosimeters record emitted light when heated, and optically stimulated luminescence badges use blue LEDs to stimulate luminescence. Each of these methods provides a cumulative measurement that reflects the individual’s accumulated radiation dose.