The law requires radiation dose measurements for individuals working in areas where they may exposed to radiation; see dosiimetry and radiological environmental protection FAQ. You are required to wear a dosimeter while working in or visiting areas that are defined as:

  • Radiologically Controlled Areas
  • Radioactive Material Storage Areas
  • Radiation, High Radiation, and Very High Radiation Areas
  • Contamination Areas

Although radiation levels are low at most SLAC locations, we measure personnel radiation doses to ensure that dose levels are "As Low As Reasonably Achievable" - ALARA - and keep records that are required by the Department of Energy.

Radiological Worker Training (RWT) and an RWT dosimeter is needed for individuals who will handle radioactive material or who are identified as radiological workers.

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