Oregon Administrative Rules › Chapter 333 - OREGON HEALTH AUTHORITY, PUBLIC HEALTH DIVISION › Division 121 - LICENSING AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS › Section 333-121-0190 - Design Requirements

Current through Register Vol. 63, No. 7, July 1, 2024
Irradiators whose construction begins after September 1, 2002,
				must meet the design requirements of this section.
(1) Shielding. For panoramic irradiators, the
			 licensee shall design shielding walls to meet generally accepted building code
			 requirements for reinforced concrete and design the walls, wall penetrations,
			 and entranceways to meet the radiation shielding requirements of OAR
			 333-121-0120. If the
			 irradiator will use more than 2 x 1017 becquerels (5 million Ci) of activity,
			 the licensee shall evaluate the effects of heating of the shielding walls by
			 the irradiator sources.
(2)
			 Foundations. For panoramic irradiators, the licensee shall design the
			 foundation, with consideration given to soil characteristics, to ensure it is
			 adequate to support the weight of the facility shield walls.
(3) Pool integrity. For pool irradiators, the
			 licensee shall design the pool to assure that it is leak resistant, that it is
			 strong enough to bear the weight of the pool water and shipping casks, that a
			 dropped cask would not fall on sealed sources, that all outlets or pipes meet
			 the requirements of OAR
			 333-121-0160(2)
 
			 and that metal components are metallurgically compatible with other components
			 in the pool.
(4) Water handling
			 system. For pool irradiators, the licensee shall verify that the design of the
			 water purification system is adequate to meet the requirements of OAR
			 333-121-0160(5).
			 The system must be designed so that water leaking from the system does not
			 drain to unrestricted areas without being monitored.
(5) Radiation monitors. For all irradiators,
			 the licensee shall evaluate the location and sensitivity of the monitor to
			 detect sources carried by the product conveyor system as required by OAR
			 333-121-0140(1).
			 The licensee shall verify that the product conveyor is designed to stop before
			 a source on the product conveyor would cause a radiation overexposure to any
			 person. For pool irradiators, if the licensee uses radiation monitors to detect
			 contamination under OAR
			 333-121-0340(2),
			 the licensee shall verify that the design of radiation monitoring systems to
			 detect pool contamination includes sensitive detectors located close to where
			 contamination is likely to concentrate.
(6) Source rack. For pool irradiators, the
			 licensee shall verify that there are no crevices on the source or between the
			 source and source holder that would promote corrosion on a critical area of the
			 source. For panoramic irradiators, the licensee shall determine that source
			 rack drops due to loss of power will not damage the source rack and that source
			 rack drops due to failure of cables, or alternate means of support, will not
			 cause loss of integrity of sealed sources. For panoramic irradiators, the
			 licensee shall review the design of the mechanism that moves the sources to
			 assure that the likelihood of a stuck source is low and that, if the rack
			 sticks, a means exists to free it with minimal risk to personnel.
(7) Access control. For panoramic
			 irradiators, the licensee shall verify from the design and logic diagram that
			 the access control system will meet the requirements of OAR
			 333-121-0110.
(8) Fire protection. For panoramic
			 irradiators, the licensee shall verify that the number, locations, and spacing
			 of the smoke and heat detectors are appropriate to detect fires and that the
			 detectors are protected from mechanical and radiation damage. The licensee
			 shall verify that the design of the fire extinguishing system provides the
			 necessary discharge patterns, densities, and flow characteristics for complete
			 coverage of the radiation room and that the system is protected from mechanical
			 and radiation damage.
(9) Source
			 return. For panoramic irradiators, the licensee shall verify that the source
			 rack will automatically return to the fully shielded position if power is lost
			 for more than ten seconds.
(10)
			 Seismic. For panoramic irradiators to be built in seismic areas, the licensee
			 shall design the reinforced concrete radiation shields to retain their
			 integrity in the event of an earthquake by designing to the seismic
			 requirements of an appropriate source such as the American Concrete Institute
			 Standard ACI 318-89, "Building Code Requirements for Reinforced Concrete,"
			 Chapter 21, "Special Provisions for Seismic Design," or local building codes,
			 if current.
(11) Wiring. For
			 panoramic irradiators, the licensee shall verify that electrical wiring and
			 electrical equipment in the radiation room are selected to minimize failures
			 due to prolonged exposure to radiation.
Stat. Auth.: ORS 453.675
Stats. Implemented: ORS
				  453.675