Nebraska Administrative Code › Topic - HEALTH AND HUMAN SERVICES SYSTEM › Title 180 - CONTROL OF RADIATION › Chapter 19 - LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS › Section 180-19-016 - DESIGN REQUIREMENTS

Current through June 17, 2024
Irradiators whose construction begins after October 30, 1996, must meet
	 the design requirements of this section.
016.01
SHIELDING.
For panoramic irradiators, the licensee must 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 180 NAC 19-009. If the irradiator will use more than
  2 x1017 becquerels (5 million curies) of activity,
  the licensee must evaluate the effects of heating of the shielding walls by the
  irradiator sources.
016.02
FOUNDATIONS.
For panoramic irradiators, the licensee
  must design the foundation, with consideration given to soil characteristics,
  to ensure it is adequate to support the weight of the facility shield walls.
016.03
POOL
  INTEGRITY.
For pool irradiators, the licensee must design the pool
  to assure it is leak resistant, strong enough to bear the weight of the pool
  water and shipping casks, a dropped cask would not fall on sealed sources, all
  outlets or pipes meet the requirements of 180 NAC 19-013.02, and metal
  components are metallurgically compatible with other components in the
  pool.
016.04
WATER
  HANDLING SYSTEM.
For pool irradiators, the licensee must verify
  the design of the water purification system is adequate to meet the
  requirements of 180 NAC 19-013.05. The system must be designed so water leaking
  from the system does not drain to unrestricted areas without being
  monitored.
016.05
RADIATION MONITORS.
For all irradiators, the licensee
  must evaluate the location and sensitivity of the monitor to detect sources
  carried by the product conveyor system as required by 180 NAC 19-011.01. The
  licensee must verify 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 180 NAC 19-022.02, the licensee must verify the design of
  radiation monitoring systems to detect pool contamination includes sensitive
  detectors located close to where contamination is likely to
  concentrate.
016.06
SOURCE RACK.
For pool irradiators, the licensee must
  verify 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 must determine source rack drops due to
  loss of power will not damage the source rack and 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, must
  review the design of the mechanism that moves the sources to assure 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.
016.07
ACCESS
  CONTROL.
For panoramic irradiators, the licensee must verify from
  the design and logic diagram that the access control system will meet the
  requirements of 180 NAC 19-008.
016.08
FIRE
  PROTECTION.
For panoramic irradiators, the licensee must verify
  the number, location, and spacing of the smoke and heat detectors are
  appropriate to detect fires and the detectors are protected from mechanical and
  radiation damage. The licensee must verify the design of the fire extinguishing
  system provides the necessary discharge patterns, densities, and flow
  characteristics for complete coverage of the radiation room and the system is
  protected from mechanical and radiation damage.
016.09
SOURCE
  RETURN.
For panoramic irradiators, the licensee must verify the
  source rack will automatically return to the fully shielded position if offsite
  power is lost for more than 10 seconds.
016.10
SEISMIC.
For
  panoramic irradiators to be built in seismic areas, the licensee must 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," or local building codes, if current.
016.11
WIRING.
For
  panoramic irradiators, the licensee must verify electrical wiring and
  electrical equipment in the radiation room are selected to minimize failures
  due to prolonged exposure to radiation.