Ohio Administrative Code › Title 3701:1 - Radiation Control › Chapter 3701:1-52 - Licensing and Safety Requirements for Irradiators › Section 3701:1-52-16 - Design requirements

Current through all regulations passed and filed through July 1, 2024
Irradiators whose construction begins after July 1, 1993, must
				meet the design requirements of this rule.
(A) 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 paragraph (A) of rule
			 3701:1-52-11
			 of the Administrative Code. 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.
(B) For panoramic irradiators the licensee
			 shall:
(1) 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 rule
			 3701:1-52-09 of the
			 Administrative Code. If the irradiator will use more than 2 x
			 1017 becquerels (five million curies) of activity,
			 evaluate the effects of heating of the shielding walls by the irradiator
			 sources;
(2) Design the foundation,
			 with consideration given to soil characteristics, to ensure it is adequate to
			 support the weight of the facility shield walls;
(3) Verify from the design and logic diagram
			 that the access control system will meet the requirements of rule
			 3701:1-52-08 of
			 the Administrative Code;
(4) 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, and 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;
(5) Verify that the source rack will
			 automatically return to the fully shielded position if offsite power is lost
			 for more than ten seconds;
(6) If
			 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 American
			 Concrete Institute Standard ACI 318-89, "Building Code Requirements for
			 Reinforced Concrete," Chapter 21, "Special Provisions for Seismic Design,"
			 revised 1992 (this publication may be obtained from the American Concrete
			 Institute, PO Box 9094, Farmington Hills, MI 48331, telephone (248)848-3700,
http://www.concrete.org/store.aspx
)
			 or local building codes, if current;
(7) Verify that electrical wiring and
			 electrical equipment in the radiation room are selected to minimize failures
			 due to prolonged exposure to radiation;
(8)
			 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;
			 and
(9) 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.