9.2 Bioassays

Thyroid and/or urine bioassays are performed for personnel for whom internal exposure to radioactive materials is considered most likely.

Bioassays are normally performed for: 

  • Users of unbound radioiodine.
  • Individuals using large quantities of radioactive materials as determined by EHS.
  • Declared pregnant radiation workers working with unsealed radioactive material.
  • Individuals with accidental or suspected intake of radioactive material.
  • Anyone who suspects that they have had an intake of radioactive material through any pathway (for example, ingestion, inhalation or skin absorption) should contact EHS immediately at 335-8501 so that an evaluation can be performed.