Every country have different regulations and even within one country different states may have slightly different requirements.
I understand from your profile that you are based in western part of Sydney and as per NSW EPA requirements, any company who owns, store, give away, sell and possess a radiation equipment needs to have a Radiation Management license.
You can apply for the management license from the below link and can get all the details from the EPA site. http://www.epa.nsw.gov.au/resources/rad ... ceappn.pdfhttp://www.epa.nsw.gov.au/radiation/
In addition to that, Radiation license is required for the person who has to provide service support to the X-ray Inspection equipment. The operators at your site may only require basic training regarding the risks involved and the safe operating practices on the X-ray equipment and that is usually given by the X-ray machinery supplier. Any specialized user license may not be required for your operators.
Regarding radiation exposure to your operators and products. It is minimal and many times it is just equivalent to the background radiation only. This is almost guaranteed if you have a good quality X-ray inspection machine and all the safeguards are in place.
Cabinet X-ray machines for checking food contaminants & product integrity are very safe and almost all the major food and beverage companies are using these machines now a days to make sure product safety in the market.
As a matter of fact, we can hep quite a lot on this, I have sent a PM to you, please check & we can discuss further on this.