10 CFR §835.401

1. (a)Monitoring of individuals and areas shall be performed to:
   1. (1)Demonstrate compliance with the regulations in this part;
   2. (2)Document radiological conditions;
   3. (3)Detect changes in radiological conditions;
   4. (4)Detect the gradual buildup of radioactive material;
   5. (5)Verify the effectiveness of engineered and administrative controls in containing radioactive material and reducing radiation exposure; and
   6. (6)Identify and control potential sources of individual exposure to radiation and/or radioactive material.
2. (b)Instruments and equipment used for monitoring shall be:
   1. (1)Periodically maintained and calibrated on an established frequency;
   2. (2)Appropriate for the type(s), levels, and energies of the radiation(s) encountered;
   3. (3)Appropriate for existing environmental conditions; and
   4. (4)Routinely tested for operability.