Statutes, codes, and regulations
Colorado Administrative Code
Department 1000 - Department of AgricultureDivision 1007 - Plant Industry DivisionRule 6 CCR 1007-1 - RULES AND REGULATIONS PERTAINING TO THE ADMINISTRATION AND ENFORCEMENT OF THE PESTICIDE APPLICATORS' ACTPart 19 - RADIATION CONTROL - LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS
OPERATION OF IRRADIATORS
Section 6 CCR 1007-1-19.21 - Radiation surveys

6 Colo. Code Regs. § 1007-1-19.21

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Current through Register Vol. 47, No. 11, June 10, 2024
Section 6 CCR 1007-1-19.21 - Radiation surveys
19.21.1 A radiation survey of the area outside the shielding of the radiation room of a panoramic irradiator must be conducted with the sources in the exposed position before the facility starts to operate.
19.21.1.1 A radiation survey of the area above the pool of pool irradiators must be conducted after the sources are loaded but before the facility starts to operate.
19.21.1.2 Additional radiation surveys of the shielding must be performed at intervals not to exceed 3 years and before resuming operation after addition of new sources or any modification to the radiation room shielding or structure that might increase dose rates.
19.21.2 If the radiation levels specified in 19.9 are exceeded, the facility must be modified to comply with the requirements in 19.9.
19.21.3 Portable radiation survey meters must be calibrated at least annually to an accuracy of 20 percent for the gamma energy of the sources in use.
19.21.3.1 The calibration must be done at two points on each scale or, for digital instruments at one point per decade over the range that will be used.
19.21.3.2 Portable radiation survey meters must be of a type that does not saturate and read zero at high radiation dose rates.
19.21.4 Water from the irradiator pool, other potentially contaminated liquids, and sediments from pool vacuuming must be monitored for radioactive contamination before release to unrestricted areas. Radioactive concentrations must not exceed those specified in Part 4, Appendix 4B, Table 4B1, "Annual Limits on Intakes (ALIs) and Derived Air Concentrations (DACs)", or Table 4B3, "Release to Sewers."
19.21.5 Before releasing resins for unrestricted use, they must be monitored before release in an area with a background level less than 0.5 microsievert (0.05 millirem) per hour.
19.21.5.1 The resins may be released only if the survey does not detect radiation levels above background radiation levels.
19.21.5.2 The survey meter used must be capable of detecting radiation levels of 0.5 microsievert (0.05 millirem) per hour.

6 CCR 1007-1-19.21

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