Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part XV - Radiation Protection › Chapter 17 - Licensing and Radiation Safety Requirements for Irradiators › Section XV-1731 - Design Requirements

Current through Register Vol. 50, No. 6, June 20, 2024
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 LAC 33:XV.1717. If the irradiator shall 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.
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 LAC 33:XV.1725.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 LAC 33:XV.1725.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 LAC
				33:XV.1721.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 LAC 33:XV.1743.B, 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.
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 shall
				not damage the source rack and that source rack drops due to failure of cables,
				or alternate means of support, shall 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 shall meet the
				requirements of LAC 33:XV.1715.
H.
				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.
I. Source Return. For panoramic irradiators,
				the licensee shall verify that the source rack shall automatically return to
				the fully shielded position if 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 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.
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.
L.
				Irradiators whose construction begins after promulgation of this Chapter shall
				meet the design requirements of this Section.
AUTHORITY NOTE:
				  Promulgated in accordance with
				  R.S.
				  30:2001 et seq., and
				  2104(B).