Nondestructive Waste Assay Using Gamma-Ray Active and Passive Computed Tomography
The TMS # changed from 1568c to 2123 and the title has changed from the last report. The funding profile of this technology has changed from the FY 1998 Semi-Annual Report to reflect individual NDA project activites and the separation of the funds by program element (industry porgrams, CMST, etc.). The intent of the Gamma-Ray Active & Passive Computed Tomography (A&PCT) development and demonstration project was to enhance the overall utility of waste assay through the implementation of techniques that can accommodate known measurement complications, e.g., waste matrix and radioactive material distribution heterogeneities. The A&PCT technology uses two separate gamma-ray measurements during operation to accommodate measurement complications. The first is an active density mapping of the waste drum matrix by an external radioactive source(s) and the second is a passive measurement of the gamma-emitting radioactive source(s). The matrix and radioactive material spatial information determined from the computed tomography reconstruction process is used to arrive at a gamma attenuation corrected assay. Accurate and quantitative radioactivity values can be obtained for radionuclides present in quantities above the detection limit of the system.
	Developers: •  Lawrence Livermore National Laboratory
	Applications: •  Drums or items whose volume is equal + or < a 416-L (110 gal) drum •  Items weighing equal to or less than 1,600 lbs. each •  Low-level, TRU, and mixed wastes •  All packaging types including metal drums, lead drum liners, cemented or lead shielding, steel pipe overpacks, metal drum overpacks, poly or fiber board liners, poly drum liners, and poly bags, all matrices including sludge, cement, metals, glass, plastics, etc.
	Benefits: •  Better NDA technologies would result in lower worker exposure from sampling and analysis.
	Status: •  A single detector gamma-ray A&PCT system has been deployed on the BioImaging Research Inc's., Waste Inspection Tomography Trailer in FY98 •  The WIT trailer is currently going through CAO certification at the Nevada Test Site •  The system is scheduled to be upgraded to a multi-detector system in FY99 to increase system throughput •  Produced all the data needed to complete an Innnovative Technology Summary Report in FY98
Milestones:  Completed Incomplete PR FY 96 PR FY 97 DM     IT     DP FY 98 AI FY 99   IT - ITSR Publication; PR - Peer Review; DP - Deployment; AI - Available for Implementation; DM - Demonstration; BST - Bench-Scale Testing;
9/19/02 TRU and Mixed Waste OST Ref #: 2123