COMPARISON OF RESULTS FROM THE CALIFORNIUM SHUFFLER AND SEGMENTED GAMMA SCANNER NDA TECHNIQUES

The world of Nondestructive Analysis (NDA) is an ever increasing source of information for both the nuclear safeguards realm and areas of environmental concern. The Portsmouth Gaseous Diffusion Plant (GDP) is a uranium enrichment facility, where different NDA techniques are used for different measurement requirements. To date there have been limited statistical studies comparing different types of measurement techniques. This paper presents a correlation between two types of NDA instruments, the Californium Shuffler and the Segmented Gamma Scanner (SGS). The Californium Shuffler utilizes neutron interrogation, while the SGS relies on gamma-ray spectroscopy to determine the uranium content in 55-gallon containers. Comparison can be made for results obtained from each instruments in an intersecting range of matrices. A brief overview of the operation of these two instruments is presented along with the applicability of each. A discussion of the nuclear materials used in the measurements and matrices examined is also included. Matrix effects, such as density and hydrogenous material content, will be demonstrated. The results are presented in a manner to relate the bias associated with each technique.