Safeguards material control and accounting program: quarterly report, October-December 1978

Work is summarized for the quarter October to December, 1978, in the Material Control Safeguards Evaluation Program, conducted for the US Nuclear Regulatory Commission (NRC) at Lawrence Livermore Laboratory. The main activities related to the continuing development of the assessment methodologies and their application to the assessment of a fuel cycle facility. Much progress was made in the Digraph - Fault-Tree Methodology, leading to the Safeguards System Vulnerability Assessment Methodology. In addition, the development of the Structured Assessment Approach continued on schedule. Both techniques were used to assess the vulnerabilities of the safeguards system at an existing fuel recovery facility (Facility X). Other activities during the quarter included (1) the continuing development of the Aggregated Systems Model (ASM), an evaluation tool designed to aid the NRC in the setting safeguards criteria; (2) the continuing structuring and data gathering for the adversary model portion of the ASM; and (3) the continuing development of computer codes for chemical process modeling/material estimation/material loss detection. 6 refs., 33 figs., 4 tabs.