Iowa Administrative Code › Agency 641 - Public Health Department › Chapter 45 - Radiation Safety Requirements for Industrial Radiographic Operations, Particle Accelerators for Nonhuman Use, Analytical X-ray Equipment, and Well-logging › Rule 641-45.5 - Radiation Safety Requirements for Analytical X-ray Equipment

Current through Register Vol. 47, No. 3, July 24, 2024
(1)
Purpose and scope.
This
			 rule provides special requirements for analytical X-ray equipment. The
			 requirements of this rule are in addition to, and not in substitution for,
			 641-Chapters 38, 39, and 40. The requirements of rules
			 641-45.1
			 (136C) to 641-45.4(136C) do not apply.
(2)
Definitions.
For the
			 purpose of this subrule, definitions in 641-Chapter 38 may also apply. As used
			 in this rule, the following definitions apply:
"AnalyticalX-ray equipment"
means equipment
				used for X-ray diffraction or fluorescence analysis.
"Analytical X-ray system"
means a group of
				components utilizing X-rays or gamma rays to determine the elemental
				composition or to examine the microstructure of materials.
"Fail-safe characteristics"
means a design
				feature which causes beam port shutters to close, or otherwise prevents
				emergence of the primary beam, upon the failure of a safety or warning
				device.
"Local components"
means part of an analytical
				X-ray system and includes X-ray areas that are struck by X-rays such as
				radiation source housings, port and shutter assemblies, collimators, sample
				holders, cameras, goniometers, detectors, and shielding, but does not include
				power supplies, transformers, amplifiers, readout devices, and control
				panels.
"Normal operating procedures"
means
				step-by-step instructions necessary to accomplish the analysis. These
				procedures shall include sample insertion and manipulation, equipment
				alignment, routine maintenance by the registrant or licensee, and data
				recording procedures, which are related to radiation safety.
"Open-beam configuration"
means an analytical
				X-ray system in which an individual could accidentally place some part of his
				body in the primary beam path during normal operation.
"Primary beam "
means radiation which passes
				through an aperture of the source housing by a direct path from the X-ray tube
				or a radioactive source located in the radiation source housing.
(3)
Equipment
			 requirements.
a.
Safety
			 device.
A device which prevents the entry of any portion of an
			 individual's body into the primary X-ray beam path or which causes the beam to
			 be shut off upon entry into its path shall be provided on all open-beam
			 configurations. A registrant or licensee may apply to the agency for an
			 exemption from the requirement of a safety device. Such application shall
			 include:
(1) A description of the various
			 safety devices that have been evaluated;
(2) The reason each of these devices cannot
			 be used; and
(3) A description of
			 the alternative methods that will be employed to minimize the possibility of an
			 accidental exposure, including procedures to ensure that operators and others
			 in the area will be informed of the absence of safety devices.