What does a TLD badge measure?

A TLD badge, or Thermoluminescent Dosimeter badge, is specifically designed to measure the accumulated radiation dose received by an individual over a specified period. The badge contains materials that are sensitive to ionizing radiation; when these materials are exposed to radiation, they store energy in a crystalline form. When subsequently heated, this stored energy is released in the form of light, which can then be measured. The intensity of the emitted light is directly proportional to the amount of radiation exposure, allowing for an accurate determination of the accumulated dose.

While environmental radiation levels are relevant to radiation safety, TLD badges specifically track an individual's exposure rather than general environmental radiation. Similarly, emergency response effectiveness and equipment calibration accuracy are not measured by TLD badges; rather, they fall under entirely different assessment tools and methodologies. Thus, focusing on individual exposure, the primary function of the TLD badge is to accurately record the accumulated radiation dose.