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E. Maximum Permissible Radiation Dose Limits for Individuals

1. External/Internal Exposure Limits for Occupationally Exposed Individuals

*Effective dose equivalent

For the purpose of external exposure, whole body includes the head and trunk area (i.e., arms above the elbows, legs above the knee, and the gonads). Extremities include the hand, elbow, arm below the elbow, foot, knee, or leg below the knee.
The whole body limit requires that internal and external exposures be summed. External exposure is determined by the use of personnel monitoring. Internal exposure may be determined by calculation and/or by the performance of bioassays (see PERSONNEL MONITORING - Bioassays). Compliance with NRC regulations is determined by comparing the amount of radioactivity in the body to the appropriate Annual Limit on Intake (ALI) in 10 CFR20, Appendix B. The limits for individuals under 18 years of age are 10% of the adult limits.

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