Current through Register Vol. 47, No. 11, June 10, 2024
Section 6 CCR 1007-1-24.12 - Calibration of Survey Instruments24.12.1 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); and24.12.2.2 Calibrate at least two (2) points, at approximately 1/3 and 2/3 of full-scale, on each scale to be calibrated; and24.12.3 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; or24.12.3.2 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; and24.12.5.7 The date of calibration.Colorado Register, Vol 37, No. 14. July 25, 2014, effective 8/14/201438 CR 02, January 25, 2015, effective 2/14/201538 CR 05, March 10, 2015, effective 3/30/201538 CR 12, June 25, 2015, effective 7/15/201538 CR 14, July 25, 2015, effective 8/14/201539 CR 02, January 25, 2016, effective 2/14/201639 CR 16, August 25, 2016, effective 9/14/201639 CR 22, November 25, 2016, effective 12/15/201640 CR 11, June 10, 2017, effective 6/30/201740 CR 20, October 25, 2017, effective 11/14/201742 CR 24, December 25, 2019, effective 1/14/202043 CR 14, July 25, 2020, effective 8/14/202043 CR 18, September 25, 2020, effective 10/15/202044 CR 11, June 10, 2021, effective 7/15/202144 CR 14, July 25, 2021, effective 8/14/202145 CR 22, November 25, 2022, effective 12/15/2022