Nebraska Administrative Code
Topic - HEALTH AND HUMAN SERVICES SYSTEM
Title 180 - CONTROL OF RADIATION
Chapter 8 - RADIATION SAFETY REQUIREMENTS FOR NON HEALING ARTS RADIATION GENERATING DEVICES
Section 180-8-011 - SHIELDED ROOM RADIATION GENERATING DEVICES
Current through September 17, 2024
Radiation generating devices in a shielded room must meet the requirements of section 003 through 007 and the following:
011.01 POSTING. All entrances to the room containing the radiation generating device must be posted "CAUTION" "HIGH RADIATION AREA", or "GRAVE DANGER" "VERY HIGH RADIATION AREA", as required by 180 NAC 4.
011.02 ENTRANCE INTERLOCKS. All entrances into the shielded room must be provided with interlocks. After an interlock has been interrupted, broken, or tripped, x-rays must only be produced again from the control panel. Interlocks must not be used to shut off the x-ray equipment except in an emergency or during testing.
011.03 ENTRANCE WARNING DEVICES. All entrances into the shielded room must be provided with a clearly visible warning device that operates only when radiation is being produced. The warning device must be labeled in accordance with subsection 003.01.
011.04 ROOM WARNING LIGHTS. The interior of the shielded room must be provided with flashing or rotating warning lights that only operate when radiation is being produced. These lights must be positioned so they can be observed from any position or orientation in the room. The lights must be posted indicating the meaning of the warning signal and instructions on what to do when the lights are operating; the posting must be legible, clearly visible, and accessible to view.
011.05 AUDIBLE ROOM WARNING DEVICE. An audible warning signal in the room must be activated and give individuals enough time to leave the room prior to the first initiation of radiation after the closing of any opening that can admit personnel. The registrant must post the meaning of the warning signal and instructions on what to do when the signal is operating; the posting must be legible, clearly visible, and accessible to view.
011.06 EMERGENCY SHUT-OFF. If dose rates exceed the High Radiation Area limits, an emergency shut off switch must be accessible to individuals in the high radiation areas. The switch and it's mode of operation must be identified by a clearly visible sign posted adjacent to the switch. The emergency shut-off switch must include a manual reset that must be reset at the switch before x-rays can be produced again from the control panel. After an emergency shut-off switch has been activated, x-rays must only be produced again from the control panel.
011.07 SEPARATE ELECTRICAL SYSTEMS. The interlock system and the emergency shutoff system must be separate electrical or mechanical systems.
011.08 ENTRY INTO THE SHIELDED ROOM. After each exposure and before entry of any personnel, the control panel must indicate that the radiation generating device is no longer producing radiation. If the control panel does not indicate that the radiation generating device is not producing radiation, a survey must be performed upon entry to the shielded room to ensure that the radiation generating device is no longer producing radiation.
011.09 PERSONNEL MONITORING. All personnel associated with the x-ray equipment must be provided with personnel monitoring devices that must be calibrated for the x-ray energies being utilized. Records of personnel exposure must be maintained.
011.10 TRAINING. The registrant must not allow any individual to operate a radiation generating device in a shielded room until that individual has received a copy of, instruction in, and demonstrated an understanding of, operating and emergency procedures for the unit and competence in its use. Records must be maintained of all operator training.
011.11 CONTROL PANEL SECURITY. The equipment control panel must be provided with a locking device to prevent unauthorized use. The locking device must, when locked, prevent the production of radiation by the equipment.
011.12 MALFUNCTIONS. If a safety or warning device malfunctions, the control panel must be locked in the "off" position. The control panel must not be used, except as necessary for repair or replacement of the malfunctioning safety or warning device, until the safety or warning device is functioning properly.
