Personnel dosimeters (whole body badges and ring badges) are issued to individuals based on the potential amount of radiation exposure, as indicated on the Principal Investigator's approved written protocol.
Personnel dosimeters cannot detect low energy beta particles, such as those emitted from Hydrogen-3, Carbon-14 and Sulfur-35. Personnel using such isotopes do not need dosimeters.
Embryo/Fetus of a Declared Pregnant Worker: 500 millirem for entire pregnancy. For more information on radiation exposure and pregnancy, download "Instructions Concerning Prenatal Radiation Exposure(736 KB)" (pdf)