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15. Model XR-3000 Design Safety Standards and Safe Operating Practices
Because of the low operating anode power of the XR 3000, real time x-ray
inspection system, it has been registered with the Center for Devices and
Radiological Health Branch of the FDA as an "Analytical X-ray System". As
registered, the system has a number of safety features provided to minimize
any x-ray scatter reaching the operator.
A. Safety:
The X-Ray tube assembly is lead shielded with at least a ¾ inch space
between collimator and image plane to minimize any x-ray scatter. The
collimator insures that the x-ray beam size at the image plane is no more than
a one-inch diameter circle. The table assembly employs a lead acrylic view
panel and additional lead shielding. The highly sensitive x-ray camera
permits the x-ray tube to operate at low power (anode voltage of 52 kV and
anode current of 25 microamps) resulting in minimal x-ray scatter. All these
safety features result in a structure with radiation scatter at 5 cm from any
exposed surface less than 0.3 milliRoentgens per hour. (Radiation exposure
in an airplane at 30,000 feet during the day is greater than 0.4 milliRoentgens
per hour.)
B. Radiation safety precautions for the use of XR 3000 Real Time X-ray
Inspection System:
It is imperative that the XR 3000 be operated only by trained personnel who
are familiar with the basic safety precautions to be taken when working with x-
ray producing equipment.
1. The key to actuate the x-rays should not be left in the equipment when
the equipment is not being used and is unattended.
2. Operators should not place hands under the leaded acrylic panel in the
front.
3. The equipment should not be operated with any panels removed.
4. Operators should be familiar with the use of the Monitor-4 radiation
survey meter.
5. Service of the equipment must be performed by or under the
instruction of trained PACE personnel.
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