Answer to Question #4963 Submitted to "Ask the Experts"
The following question was answered by an expert in the appropriate field:
A 128 kV x-ray machine was recently purchased by our company for use in nondestructive analysis of mechanical parts. In particular, the users hope to take the machine to various work sites throughout the state of California and to Colorado and Florida and x ray very large items out in the field.
I am unable to find regulations or formulas that would help me determine the 2 mrem safe perimeter area around the x-ray machine (which is controlled remotely by a laptop and is no more than 12" x 18" x 12").
It has three focal spots (measured 3mm from the Beryllium output window):
How would I calculate the 2 mrem perimeter, or where might I find resources to answer this question? I am very reluctant to allow anyone to use the x-ray machine until we establish the perimeter.
The machine that you have purchased is a powerful x-ray machine and should only be operated by a trained and experienced "radiographer" who is licensed or approved by the state where the machine will be used. For example, someone holding his/her unshielded hand in the primary beam for several minutes could lose that hand due to radiation damage.
You must also register the x-ray machine as a "radiographic device" in each state that the x-ray machine will be used.
Answer posted on 17 November 2005. The information and material posted on this website is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Website. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.
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