Dosimetry

Radiation Worker Monitoring

Certain employees who work in radiation areas or handle radioactive materials must wear dosimeters to monitor exposure. Refer to the Dosimetry Issuance Guidelines to determine need. 

Submit the Dosimetry Service Request to establish service.

Submit the Dosimetry Service Change Request to cancel service.

Send both forms to radtraining@cuanschutz.edu

When using dosimetry

• Dosimeters may only be used by worker to whom they are issued
• Wear monitor closest to and facing the source. See Care and Use of Radiation Dosimetry Badge LINKED.
• Report lost or damaged dosimeters to EHS, noting summary of use before loss

Dosimeters are exchanged monthly or quarterly. Labs may be charged for non-returned dosimeters.

Pregnancy

• Radiation workers may voluntarily inform EHS of a pregnancy as soon as it become known to them by submitting a Declaration of Pregnancy  A fetal monitor may be issued.
• By regulation, a worker is considered pregnant only after she has declared the pregnancy to her employer in writing.

More information

• Health Physics Society's "Pregnancy and Radiation Exposure"
• U.S. Nuclear Regulatory Commission's "Instruction Concerning Prenatal Radiation Exposure."
  

Bioassay

• EHS can provide routine types of bioassay measurements required by license, including urine bioassays and measurements of gamma and x-rays emitted by radioiodine in the thyroid.
• Bioassay is required depending on type of isotope, monthly usage limit, volatility, and use.
• See Bioassay Requirements for further information. The scheduling of bioassay measurements will be determined individually on a case-by-case basis.

Important

Those performing iodination, or handling unbound forms in other ways, must notify EHS, 303-724-0345, so that a thyroid bioassay can be scheduled 48 - 72 hours after each labeling or other use.