Oregon Administrative Rules › Chapter 333 - OREGON HEALTH AUTHORITY, PUBLIC HEALTH DIVISION › Division 121 - LICENSING AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS › Section 333-121-0110 - Access Control

Current through Register Vol. 63, No. 7, July 1, 2024
(1) 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 the 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 control panel lock must be designed so
			 that the key cannot be removed unless the sources have been returned to the
			 shielded position. The doors and barriers must not prevent any individual in
			 the radiation room from leaving.
(2) 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 must also 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 on-site of the entry. That individual
			 shall be trained on how to respond to the alarm and prepared to promptly render
			 or summon assistance.
(3) 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 OAR
			 333-121-0110(2).
			 The monitor may be located in the entrance, normally referred to as the maze,
			 but not in the direct radiation beam.
(4) 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 that 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.
(5) 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.
(6) 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.
(7) 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 have a sign bearing the radiation
			 symbol and the words, "Caution (or danger) radioactive material." Panoramic
			 irradiators must also have a sign stating "Grave danger, very high radiation
			 area," but the sign may be removed, covered, or otherwise made inoperative when
			 the sources are fully shielded.
(8)
			 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. The 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.
(9) 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 or facility management
			 shall have access to keys that operate 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
			 who is not necessarily on-site but who is prepared to respond or summon
			 assistance.
Stat. Auth.: ORS 453.675
Stats. Implemented: ORS
				  453.675