NAC459.712. Equipment control: Radiation survey instruments.

     1. The registrant shall maintain sufficient calibrated and operable radiation survey instruments at each location where radioactive producing equipment is used to make the radiation surveys as required by NAC 459.337 and 459.737. Instrumentation required by this section must have a range such that 2 millirems (0.02 millisievert) per hour through 1 rem (0.01 sievert) per hour can be measured.

     2. Each radiation survey instrument must be calibrated:

     (a) Against appropriate energy at intervals not exceeding 6 months and, except for battery changes, after each servicing of the instrument;

     (b) So that accuracy within plus or minus 20 percent can be demonstrated at each point checked; and

     (c) At two or more widely separated points, other than zero, on each scale, as follows:

          (1) For linear scale instruments, at two points located approximately one-third and two-thirds of full scale on each scale;

          (2) For logarithmic scale instruments, at the mid-range of each decade and at two points of at least one decade; and

          (3) For digital instruments, at 3 points between 2 millirems (0.02 millisievert) per hour and 1 rem (0.01 sievert) per hour.

     3. Records of these calibrations must be maintained for at least 3 years after the calibration date for inspection by the Division.

     [Bd. of Health, Radiation Control Reg. §§ 5.4.4-5.4.4.3, eff. 2-28-80]—(NAC A 1-18-94; 1-21-94; A by Dep’t of Human Resources by R137-01, 5-30-2003)