Nebraska Administrative Code › Topic - HEALTH AND HUMAN SERVICES SYSTEM › Title 180 - CONTROL OF RADIATION › Chapter 19 - LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS › Section 180-19-008 - ACCESS CONTROL

Current through June 17, 2024
008.01
PHYSICAL BARRIER.
Each entrance to a radiation room at
  a panoramic irradiator must have a door or other physical barrier to prevent
  inadvertent entry of personnel if the sources are not in the shielded position.
  Product conveyor systems may serve as barriers as long as they reliably and
  consistently function as a barrier. It must not be possible to move the sources
  out of their shielded position if the door or barrier is open. Opening the door
  or barrier while the sources are exposed must cause the sources to return
  promptly to their shielded position. The personnel entrance door or barrier
  must have a lock that is operated by the same key used to move the sources. The
  doors and barriers must not prevent any individual in the radiation room from
  leaving.
008.02
BACKUP
  ACCESS CONTROL.
In addition, each entrance to a radiation room at
  a panoramic irradiator must have an independent backup access control to detect
  personnel entry while the sources are exposed. Detection of entry while the
  sources are exposed must cause the sources to return to their fully shielded
  position and activate a visible and audible alarm to make the individual
  entering the room aware of the hazard. The alarm must also alert at least one
  other individual who is onsite of the entry. That individual must be trained on
  how to respond to the alarm and prepared to promptly render or summon
  assistance.
008.03
RADIATION MONITOR.
A radiation monitor must be
  provided to detect the presence of high radiation levels in the radiation room
  of a panoramic irradiator before personnel entry. The monitor must be
  integrated with personnel access door locks to prevent room access when
  radiation levels are high. Attempted personnel entry while the monitor measures
  high radiation levels must activate the alarm described in 180 NAC 19-008.02.
  The monitor may be located in the entrance, normally referred to as the maze,
  but not in the direct radiation beam.
008.04
ALARM.
Before
  the sources move from their shielded position in a panoramic irradiator, the
  source control must automatically activate conspicuous visible and audible
  alarms to alert people in the radiation room the sources will be moved from
  their shielded position. The alarms must give individuals enough time to leave
  the room before the sources leave the shielded position.
008.05
IN-ROOM SOURCE
  CONTROL.
Each radiation room at a panoramic irradiator must have a
  clearly visible and readily accessible control that would allow an individual
  in the room to make the sources return to their fully shielded
  position.
008.06
SOURCE
  MOVEMENT CONTROL.
Each radiation room of a panoramic irradiator
  must contain a control that prevents the sources from moving from the shielded
  position unless the control has been activated and the door or barrier to the
  radiation room has been closed within a preset time after activation of the
  control.
008.07
SIGNAGE.
Each entrance to the radiation room of a
  panoramic irradiator and each entrance to the area within the personnel access
  barrier of an underwater irradiator must be posted as required by 180 NAC
  4-034.05. Panoramic irradiators must comply with the posting requirements of
  180 NAC 4-034.03; however, the sign may be removed, covered, or otherwise made
  inoperative when the sources are fully shielded.
008.08
INTERLOCKS.
If the radiation room of a panoramic irradiator has roof plugs or other movable
  shielding, it must not be possible to operate the irradiator unless the
  shielding is in its proper location. This requirement may be met by interlocks
  that prevent operation if shielding is not placed properly or by an operating
  procedure requiring inspection of shielding before operating.
008.09
PERSONNEL ACCESS
  BARRIER.
Underwater irradiators must have a personnel access
  barrier around the pool which must be locked to prevent access when the
  irradiator is not attended. Only operators and facility management may have
  access to keys to the personnel access barrier. There must be an intrusion
  alarm to detect unauthorized entry when the personnel access barrier is locked.
  Activation of the intrusion alarm must alert an individual, not necessarily
  onsite, who is prepared to respond or summon assistance.