6 Colo. Code Regs. § 1007-1-24.12

Current through Register Vol. 47, No. 11, June 10, 2024
Section 6 CCR 1007-1-24.12 - Calibration of Survey Instruments
24.12.1 The registrant shall ensure that the survey instruments used to show compliance with this part have been calibrated before first use, at intervals not to exceed twenty-four (24) months, and following repair.
24.12.2 To satisfy the requirements of 24.12.1, the registrant shall:
24.12.2.1 Calibrate all required scale readings up to 10 mSv (1000 mrem) per hour with an appropriate radiation source that is traceable to the National Institute of Standards and Technology (NIST); and
24.12.2.2 Calibrate at least two (2) points, at approximately 1/3 and 2/3 of full-scale, on each scale to be calibrated; and
24.12.3 To satisfy the requirements of 24.12.2, the registrant shall:
24.12.3.1 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than ten (10) percent; or
24.12.3.2 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than twenty (20) percent if a correction factor or graph is conspicuously attached to the instrument.
24.12.4 The registrant may obtain the services of individuals licensed by the Department, NRC, an Agreement State, or a Licensing State to perform calibrations of survey instruments.
24.12.5 The registrant shall retain a record of each calibration required in 24.12.1 for three (3) years. The record shall include:
24.12.5.1 A description of the calibration procedure;
24.12.5.2 A description of the source used;
24.12.5.3 The certified dose rates from the source;
24.12.5.4 The rates indicated by the instrument being calibrated;
24.12.5.5 The correction factors deduced from the calibration data;
24.12.5.6 The signature of the individual who performed the calibration; and
24.12.5.7 The date of calibration.

6 CCR 1007-1-24.12

Colorado Register, Vol 37, No. 14. July 25, 2014, effective 8/14/2014
38 CR 02, January 25, 2015, effective 2/14/2015
38 CR 05, March 10, 2015, effective 3/30/2015
38 CR 12, June 25, 2015, effective 7/15/2015
38 CR 14, July 25, 2015, effective 8/14/2015
39 CR 02, January 25, 2016, effective 2/14/2016
39 CR 16, August 25, 2016, effective 9/14/2016
39 CR 22, November 25, 2016, effective 12/15/2016
40 CR 11, June 10, 2017, effective 6/30/2017
40 CR 20, October 25, 2017, effective 11/14/2017
42 CR 24, December 25, 2019, effective 1/14/2020
43 CR 14, July 25, 2020, effective 8/14/2020
43 CR 18, September 25, 2020, effective 10/15/2020
44 CR 11, June 10, 2021, effective 7/15/2021
44 CR 14, July 25, 2021, effective 8/14/2021
45 CR 22, November 25, 2022, effective 12/15/2022