NDA 2000: Design Parameters for a Segmented Gamma Scanner

The “NDA 2000” project is a complete redesign of all instrumentation in the nondestructive analysis laboratory at the Oak Ridge Y-12 Plant. It utilizes Ethernet technology for instrument control and data transfer. As part of the “NDA 2000 project, several enhancements have been made to our three segmented gamma scanners (SGS) for improved reliability and improved detection limits. Judicious use of peak search and region-of-interest algorithms assure accurate calibration control without the use of digital spectrum stabilizers. Deadtime corrections are accomplished using low-energy gamma ray sources, avoiding the need for electronic pulsers. Automated quality assurance routines prevent an instrument’s use when instrument control parameters are outside acceptable limits. This paper discusses details of these and other SGS enhancements. Another paper presented at this conference will explain details of hardware and software used to integrate our NDA laboratory.