In which zones should a TLD badge be worn at all times?

A TLD (Thermoluminescent Dosimeter) badge is a personal dosimeter used to measure exposure to ionizing radiation. It is essential for ensuring the safety of personnel who work in environments where they could be exposed to radiation. Wearing the badge in Zone 2 and Zone 3 is crucial as these zones typically represent areas where radiation levels are monitored and where personnel may be at risk of exposure.

Zone 2 generally indicates a controlled area where radiation levels are higher than typical background radiation but still below actionable thresholds. Zone 3 often signifies areas where the potential for radiation exposure exists, possibly during specific operations or tasks. By wearing the badge continuously in these zones, workers ensure their exposure is documented, which is vital for assessing safety, compliance with health and safety regulations, and taking proactive measures to limit exposure.

In contrast, exclusive zones and unzoned areas usually pertain to areas with no specific radiation monitoring requirements or where hazards are minimal, so wearing the badge there is not as critical. Thus, the requirement to wear the TLD badge at all times in Zone 2 and Zone 3 reflects the necessity of monitoring and protecting against radiation exposure effectively.