Dosimetry Regulations

Regulations require that visitors entering certain areas of Crocker Nuclear Laboratory wear a dosimeter, a small device that measures radiation exposure. If your itinerary requires a dosimeter, the receptionist will issue one. Like a name badge, it can be clipped to a collar, pocket or belt. Upon leaving, you will be asked to return the dosimeter to the receptionist. Dosimeters are not required for proton therapy patients and accompanying family members.