This presentation describes the design and manufacture of a computer controlled x-ray scanning system for the fully automated inspection of waste for hazardous materials. Of particular importance was the necessity to accurately detect various sizes of propane tanks and large heavy metal objects. In addition, rejects had to be accurately identified and each image saved for archival requirements. The equipment utilized, material handling, software development and implementation is detailed herein. The problems of establishing a stable image in a harsh environment required ruggedizing all of the components as well as positive pressure air delivery and air conditioning of the computer and related electronic enclosures. The use of commercially available equipment and latest detector technology were utilized as much as possible to reduce costs and to provide a reliable low maintenance system that also included the ability to conduct diagnostics and software upgrades remotely via computer.

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