Section 325.5390. Shielding.

(1) The degree of protection required shall be determined by the workload, use and occupancy factors and the kilovoltage, milliamperage, mechanical movement, and distance factor, and  shall  be subject  to  design approval by the department.

(2)    Radiographic-room wall and floor areas exposed to the useful beam plus an area extending at least 30 centimeters (1 foot) beyond shall be provided with a primary protective barrier where necessary as determined by workload, use, occupancy and distance factors. All vertical primary protective

barriers specified in this rule shall extend continuously from the floor to a minimum height of

2.1 meters (7 feet).

(3)   Secondary protective barriers shall be provided in  the  radiographic room ceiling and in those walls not requiring primary barriers.

(4)   Control apparatus for the radiographic equipment shall be shielded by a non-removable primary protective barrier extending to a minimum height of 2.1 meters (7 feet).

(5)    Exposure switch location and control shield shall be oriented  such that, at arm's length from the exposure switch, the operator shall not be exposed to the useful beam, leakage radiation or any radiation which has been scattered only once.

(6)    The operator shall be able to see and communicate with the patient from a shielded position at the control panel. When an observation window is provided, it shall have a lead equivalence at least equal to that required of the control barrier and shall be installed   such that  the  attenuation effectiveness of the barrier is not impaired.

History: 1979 AC.