Section 157.38. Radiation survey instruments.

 

(1)   Requirement. A licensee shall keep sufficient calibrated and operable radiation survey instruments at each location where sources of radiation are present to make the radiation surveys required by this subchapter and subch. III . Instrumentation required by this subchapter shall be capable of measuring a range from 0.02 millisieverts (2 mrem) per hour through 0.01 sievert (1 rem) per hour.

(2)   Calibration.

(a) A licensee shall have each radiation survey instrument calibrated for all the following:

1. At energies appropriate for use and at intervals not to exceed 6 months or after instrument servicing, except for battery changes.

2. For linear scale instruments, at 2 points located approximately one-third and two-thirds of full scale on each scale; for logarithmic scale instruments, at mid-range of each decade and at 2 points of at least one decade; and for digital instruments at 3 points between 0.02 and 10 millisieverts (2 and 1000 mrem) per hour.

(b) Accuracy within plus or minus 20% of the true radiation dose rate shall be demonstrated at each point checked.

CR 01-108 : cr. Register July 2002 No. 559 , eff. 8-1-02.