A well-functioning dosimetry program is essential for a safe operation and for compliance with applicable federal and state regulations. The University radiation dosimetry program is described in detail in Procedures 3.1/3.1.1.
Classification of Dosimeters: There are four methods of radiation dosimetry at the University as follows:
Classification of Individuals Addressed by the Dosimetry Program: The large majority of employees and students at the University are not exposed to ionizing radiation and thus, are not covered by the dosimetry program. The remainder of individuals is classified into three groups as follows:
Required to wear dosimeters:
May request a dosimeter:
Assessment Process: It is recognized that a great deal of judgment is required to place an individual in a group and to apply a specific method of monitoring. These decisions are made by the Radiation Safety Officer as recommended by the Radiation Safety Committee based on the following criteria:
The placement of an individual is reassessed as needed by the Radiation Safety Committee as recommended by the Radiation Safety Officer.
Pregnant Workers: University policy relies upon the ALARA principle, thus reducing the necessity for a special policy for pregnant women. However, there is a recognition that a pregnant worker may require specific information to make an informed decision. The Fetal Protection Program is described in detail in Procedure 1.4 (in the revision process).
Exposure Reports: The Radiation Safety Officer reviews exposures on a regular basis. Subsequently, high or unusual exposures are reported to the Radiation Safety Committee. All monitored individuals included receive an annual exposure report.
Enforcement of External Dosimetry Program: External dosimeters will be provided to required individuals on an appropriate basis i.e., monthly or quarterly. All individuals in this group are required to promptly return the dosimeters. A delay by more than one month in returning the dosimeter without a written explanation may be considered a violation of University policy and may lead to the revocation of authorization to use radioactive materials or a monetary penalty.
Individuals that are assigned dosimeters due to voluntary request are required to comply with all policies governing monitored individuals. This group is also expected to return the dosimeter promptly. Failure to return a dosimeter by more than one month may be considered a violation of University policy.
Internal Dosimetry Program:
Enforcement of Internal Dosimetry Program: The method and the frequency of bioassay depends upon the nature including the half-life of the radionuclide of concern. Once the frequency of bioassay is established, the enforcement follows the external dosimetry enforcement by replacing the month with the appropriate interval (e.g. 14 days).