South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-64 - X-Rays (Title B) › Part VIII - RADIATION SAFETY REQUIREMENTS FOR INDUSTRIAL USES OF RADIOGRAPHIC SOURCES › Section 61-64.VIII.RHB 8.13 - Special Requirements for Certain Industrial Radiographic Techniques

Current through Register Vol. 48, No. 6, June 28, 2024
8.13.1 Cabinet Radiography.
8.13.1.1 Upon installation, a cabinet
				radiography unit shall not be operated until a physical radiation survey of the
				unit and areas adjacent to the unit has been performed. A radiation survey of
				the unit and area adjacent to the unit shall also be performed at least
				annually, and after any repair modification, or maintenance on the
				system.
8.13.1.2 Tests for proper
				operation of high radiation area control devices, alarm systems, or interlocks
				must be conducted at least annually, recorded, and maintained in accordance
				with RHB
				8.10.
8.13.1.3 Radiation emitted from the cabinet
				x-ray unit shall not exceed one-half milliRoentgen (0.5 mR) per hour at any
				point five centimeters (5 cm) from the external surface.
8.13.1.4 A cabinet x-ray system shall have a
				permanent floor. Any support surface to which a cabinet x-ray system is
				permanently affixed may be deemed the floor of the system.
8.13.1.5 The insertion of any part of the
				human body through any port into the primary beam or through any aperture shall
				not be possible.
8.13.1.6
				Interlocks.
8.13.1.6.1 Each door of a cabinet
				x-ray system shall have a minimum of two (2) safety interlocks. One (1), but
				not both, of the required interlocks shall be such that door opening results in
				physical disconnection of the energy supply circuit to the high-voltage
				generator, and such disconnection shall not be dependent upon any moving part
				other than the door.
8.13.1.6.2
				Each access panel shall have at least one (1) safety interlock.
8.13.1.6.3 Following interruption of x-ray
				generation by the functioning of any safety interlock, use of a control
				provided in accordance with
				RHB 8.13.1.8.2 shall
				be necessary for resumption of x-ray generation.
8.13.1.6.4 Failure of any single component of
				the cabinet x-ray system shall not cause failure of more than one (1) required
				safety interlock.
8.13.1.7 A ground fault, or an accidental
				electrical grounding of an electrical conductor, shall not result in the
				generation of x-rays.
8.13.1.8
				Controls and indicators for all cabinet x-ray systems. For all systems to which
				this section is applicable, there shall be provided:
8.13.1.8.1 A key actuated control to ensure
				that x-ray generation is not possible with the key removed.
8.13.1.8.2 A control or controls to initiate
				and terminate the generation of x-rays other than by functioning of a safety
				interlock or the main power control.
8.13.1.8.3 Two (2) independent means which
				indicate when and only when x-rays are being generated, unless the x-ray
				generation period is less than one-half (0.5) second in which case the
				indicators shall be activated for one-half (0.5) second, and which are
				discernible from any point at which initiation of x-ray generation is possible.
				Failure of a single component of the cabinet x-ray system shall not cause
				failure of both indicators to perform their intended function. One (1), but not
				both, of the indicators required by this regulation may be a milliammeter
				labeled to indicate x-ray tube current. All other indicators shall be legibly
				labeled "X-RAY ON."
8.13.1.8.4
				Additional means, other than milliammeters, which indicate when and only when
				x-rays are being generated, unless the x-ray generation period is less than
				one-half (0.5) second, in which case the indicators shall be activated for
				one-half (0.5) second, as needed to ensure that at least one (1) indicator is
				visible from each door, access panel, and port, and is legibly labeled "X-RAY
				ON."
8.13.1.9 Additional
				controls and indicators for cabinet x-ray systems designed to admit humans. For
				cabinet x-ray systems designed to admit humans, there shall also be provided:
8.13.1.9.1 A control within the cabinet for
				preventing and terminating x-ray generation, which cannot be reset, overridden,
				or bypassed from the outside of the cabinet.
8.13.1.9.2 No means by which x-ray generation
				can be initiated from within the cabinet.
8.13.1.9.3 Audible and visible warning
				signals within the cabinet which are actuated for at least ten (10) seconds
				immediately prior to the first initiation of x-ray generation after closing any
				door designed to admit humans. Failure of any single component of the cabinet
				x-ray system shall not cause the failure of both the audible and visible
				warning signals.
8.13.1.9.4 A
				visible warning signal within the cabinet which remains actuated when and only
				when x-rays are being generated unless the x-ray generation period is less than
				one-half (0.5) second, in which case the indicator shall be activated for
				one-half (0.5) second.
8.13.1.9.5
				Signs indicating the meaning of the warning signals required by
				RHB 8.13.1.9.3 and
				8.13.1.9.4 and containing instructions for the use of the control required by
				RHB 8.13.1.9.1. These
				signs shall be legible, accessible to view, and illuminated when the main power
				control is in the "on" position.
8.13.1.10 Warning labels. There shall be
				permanently affixed or inscribed on the cabinet x-ray system at the location of
				any controls which can be used to initiate x-ray generation, a clearly legible
				and visible label bearing the statement: "CAUTION: X-RAYS PRODUCED WHEN
				ENERGIZED." There shall also be a permanently affixed or inscribed on the
				cabinet x-ray system adjacent to each port a clearly legible and visible label
				bearing the statement: "CAUTION: DO NOT INSERT ANY PART OF THE BODY WHEN SYSTEM
				IS ENERGIZED-X-RAY HAZARD."
8.13.1.11 Additional requirements for x-ray
				baggage inspection systems. X-ray systems designed primarily for the inspection
				of carry-on baggage at airline, railroad, and bus terminals, and at similar
				facilities, shall be provided with means to ensure operator presence at the
				control area in a position which permits surveillance of the ports and doors
				during generation of x-rays.
8.13.1.11.1
				During an exposure or preset succession of exposures of one-half (0.5) second
				or greater duration, the means provided shall enable the operator to terminate
				the exposure or preset succession of exposures at any time.
8.13.1.11.2 During an exposure or preset
				succession of exposures of less than one-half (0.5) second duration, the means
				provided may allow completion of the exposure in progress but shall enable the
				operator to prevent additional exposures.