Hazard control measures for analytical x-ray systems

Requirements for controlling potential hazards associated with analytical x-ray systems are specified in most states by law. For example, at Ames Laboratory these requirements are detailed in the Radiological Protection Program or Policy 10202.003, Analytical X-ray Safety . Portions of these hazard control and safety measures are summarized below. 

Shutters. On open-beam configurations, each port on the source housing shall be equipped with a shutter that cannot be opened unless a collimator or coupling has been connected to the port. 

Housing interlock. Each x-ray tube housing shall be equipped with an interlock that shuts off the tube if the tube is removed from the housing or if the housing is disassembled. 

Shielding provided by housing. Each x-ray tube housing shall be constructed so that, with all shutters closed, the radiation, measured at a distance of five centimeters from its surface, is not capable of producing a dose in excess of 2.5 mrem in one hour. 

Warning lights. An easily visible warning light with the words X-RAY ON shall be located near any switch that energizes an x-ray tube and shall be illuminated only when the tube is energized. 

---