A COMBINED SAFE/SNAP APPROACH TO SAFEGUARDS EVALUATION

Generally, the scope of a safeguards evaluation model can efficiently address one of two issues: (1) global safeguards effectiveness or (2) vulnerability analysis for individual scenarios. The Safeguards Automated Facility Evaluation (SAFE) focuses on the first issue, while the Safeguards Network Analysis Procedure (SNAP) is directed towards the second. SAFE addresses global safeguards effectiveness in that it considers the entire facility, i.e., the composite system of hardware and human components, in one \"global\" analysis. SNAP addresses individual-scenario vulnerability by providing a safeguards modeling symbology sufficiently flexible to represent quite complex scenarios from the standpoint of hardware interfaces, while also accounting for a rich variety of human decision making. A .combined SAFE/SNAP approach to the problem of safeguards evaluation is described and illustrated through an example.