Analysis of NDA (nondestructive assay) instrument calibration data

This report discusses some of the many items that must be considered when analyzing the calibration data form nondestructive assay (NDA) instrumentation. Evaluating the effect of calibration errors on materials control and accountability requires careful consideration of many factors. Some of the topics discussed are the types of calibration curves, general types of standards and their applicability to actual measured samples, and data acquisition. The report emphasizes that knowledge of the characteristics of the NDA instrumentation must be applied during the calibration data analysis procedure. Examples illustrating these effects are presented using actual calibration data from in-field instruments measuring highly enriched uranium. 2 refs., 15 figs., 1 tab.