NAC459.748. Safety requirements: Warning devices; operating procedures.

     1. All locations designated as areas of high radiation and all entrances to those locations must be equipped with easily observable flashing or rotating warning lights that operate when, but only when, radiation is being produced.

     2. Except in facilities designed for human exposure, each area of high radiation must have an audible warning device which is activated for 15 seconds before the creation of high radiation within the area. The warning devices must be clearly audible in all high radiation areas and all radiation areas.

     3. Entrances and pathways leading to high radiation areas must be identified in accordance with NAC 459.355.

     4. Particle accelerators, when not in operation, must be secured to prevent unauthorized use.

     5. The safety interlock system must not be used to turn off the accelerator beam except in an emergency.

     6. All safety and warning devices, including interlocks, must be checked for proper operability at intervals of not more than 3 months. Results of the checks must be maintained at the accelerator facility for inspection by the Division.

     7. Diagrams of the electrical circuit of the accelerator and associated interlock systems must be kept current and maintained for inspection by the Division and must be available to the operator at each accelerator facility.

     8. If it is necessary to bypass a safety interlock or interlocks intentionally, the bypass must be:

     (a) Authorized by the radiation safety committee or radiation safety officer;

     (b) Recorded in a permanent log and a notice posted at the accelerator control console; and

     (c) Terminated as soon as possible.

     9. A copy of the current operating and the emergency procedures must be maintained at the accelerator control panel.

     [Bd. of Health, Radiation Control Reg. §§ 9.3.5-9.3.6.6, eff. 2-28-80]—(NAC A 1-18-94)