Or. Admin. R. 333-121-0190 - Design Requirements
Irradiators whose
(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.
Notes
Stat. Auth.: ORS 453.675
Stats. Implemented: ORS 453.675
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