THE SAFEGUARDS PERFORMANCE EVALUATION SYSTEM

Evaluation of the effectiveness of IAEA safeguards carried out in specific facilities requires complex logical manipulation of large amounts of data. A computer program, the Safeguards Performance Evaluation System (SPESY), has been developed which allows rapid and straightforward evaluation of safeguards effectiveness using either the criteria for inspection goal attainment used internally by the IAEA or an alternative approach developed at the Kernforschungsanlage, Juelich, FRG. This second approach allows calculation of a numerical confidence factor for goal achievement in cases where not all routine inspection activities have been completely carried out. The computer program, written in the PROLOG language for IBM-compatible computers, has the,,capabil ity of, explaining the logic used to reach a conclusion concerning safeguards effectiveness in a specific case. To date, SPESY\" has been written for and applied to safeguards measures at light-water reactors. It is currently being extended to encompass low-enriched uranium fuel-fabrication plants and other bulk facilities.