Illinois Administrative Code › Title 32 - ENERGY › Part 346 - LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS › Subpart C - DESIGN AND PERFORMANCE REQUIREMENTS OF IRRADIATORS › Section 346.390 - Design Requirements

Current through Register Vol. 48, No. 28, July 12, 2024
Irradiators whose construction begins after December 1, 2005,
				  shall meet the design requirements of this Section.
a) 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 Section
				346.250. If the irradiator will
				use more than 2 x 1017 becquerels (5 million curies)
				of activity, the licensee shall evaluate the effects of heating of the
				shielding by the irradiator sources.
b) 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.
c) 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 Section
				346.330(b) and
				that metal components are metallurgically compatible with other components in
				the pool.
d) 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 Section
				346.330(e). The
				system shall be designed so that water leaking from the system does not drain
				to unrestricted areas without being monitored.
e) 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 Section
				346.290(a). 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 Section
				346.590(b), the
				licensee shall verify that the design of radiation monitoring systems to detect
				pool contamination included sensitive detectors located close to where
				contamination is likely to concentrate.
f) 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 alternative 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.
g) 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 Section
				346.230.
h) Fire protection. For panoramic
				irradiators, the licensee shall verify that the number, location 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.
i) Source
				return. For panoramic irradiators, the licensee shall verify that the source
				rack will automatically return to the fully shielded position if offsite power
				is lost for more than 10 seconds.
j) 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 Chapter
				21, "Special Provisions for Seismic Design", of the American Concrete Institute
				Standard "Building Code Requirements for Reinforced Concrete" (ACI 318-89) or
				local building codes, whichever is most current.
k) 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.