Technology Name: Gamma Modeler 3-D Gamma-Ray Imaging Technology

Demonstration Name:Radiological Contamination | Demonstrated on: 8/26/1999
Demonstration Site: TMS Technology Database

Demo Objective

The objective of the demonstration of the 3-D GammaModeler TM visual and gamma-ray imaging system at the Department of Energy Hanford site is to identify potentially beneficial technologies for the Canyon Disposition Initiative (CDI). To evaluate the capability of the imaging system for surveying objects for radiological contamination to yield high-quality, usable characterization information to meet CDI project requirements, to support the Performance Assessment, and to compare the 3-D system to the 2-D baseline system.

Demo Results

The AIL GammaModeler TM system could be mounted on the U-Facility’s crane hook and positioned to any location within the canyon. The pan and tilt assembly allows fine pointing of the sensor head at the equipment of interest. The laser range finder provided distance measurements to the objects being surveyed. The pan and tilt capability allowed the system to view objects that may have been blocked if a fixed viewing direction system was used. The system performed well during the demonstration and obtained data on 21 objects of interest to the CDI study. Real time display of the gamma ray images to the operator showed that seven of these objects had detectable emissions. For these objects, additional views were obtained to allow 3-D rendering. The 3-D rendering showed the sources in relationship to the visual objects. During the demonstration, 3-D renderings were generated for several of these objects and were presented during the outbrief presentation. Post demonstration analyses refined the 3-D rendering results but did not substantially change any of the results. Operation of the GammaModeler TM system is relatively simple and some training is required to assure relevant data are obtained. Currently, the use of the 3-D rendering software requires experience in modeling the source distributions. Several of the U-Facility cells were imaged. Even with the limited viewing angles that could be obtained for these cases, the 3-D rendering software still allowed 3-D representations of the source locations and strengths to be determined.

Pictures

	Gamma Image #4 obtained for the High Rad Tank on cell 35
	Sensor Position 1

Videos