NCJ Number
59812
Journal
NUCLEAR MATERIALS MANAGEMENT Volume: 6 Issue: 3 Dated: (FALL 1977) Pages: 101-110
Date Published
1977
Length
10 pages
Annotation
THE USE OF AN ADVERSARY SEQUENCE DIAGRAM AS AN ANALYSIS TOOL FOR NUCLEAR SECURITY SYSTEMS IS ADVOCATED.
Abstract
METHODS ARE BEING DEVELOPED FOR THE DESIGN OF PHYSICAL PROTECTION SYSTEMS TO SAFEGUARD SPECIAL NUCLEAR MATERIAL. THE DESIGN FOR PROTECTION OF A NUCLEAR PLANT AGAINST ADVERSARIES CONSISTS OF FIVE COMPONENTS: (1) DESCRIPTION OF THE FACILITY, (2) IDENTIFICATION OF ZONES IN THE FACILITY WHICH REQUIRE PROTECTION, (3) IDENTIFICATION OF CRITICAL PATHS TO SPECIAL NUCLEAR MATERIAL AND VITAL EQUIPMENT, (4) DEFINITION OF SAFEGUARDS COMPONENT REQUIREMENTS, AND (5) DEFINITION OF GUARD-FORCE REQUIREMENTS. THE FACILITY DESCRIPTION SHOULD BE REVIEWED TO DETERMINE POTENTIAL CONSEQUENCES OF ADVERSARY ACTIVITIES AND TO IDENTIFY SAFEGUARD CONCERNS. PROTECTION ZONES THEN ARE DEFINED BY COMBINING CONTAGIOUS AREAS WITH COMMON PROTECTION REQUIREMENTS. FOR EXAMPLE, AREAS IN WHICH SPECIAL MATERIAL IS EQUALLY ACCESSIBLE COULD BE COMBINED INTO ONE ZONE. THE ADVERSARY SEQUENCE DIAGRAM IS ONE LOGICAL WAY TO IDENTIFY THE PATHS THAT COULD BE TRAVERSED BY INTERNAL OR EXTERNAL ADVERSARIES TO PENETRATE PROTECTION ZONES. USING THE DIAGRAM, RESEARCHERS CAN WRITE EQUATIONS WITH TERMS REPRESENTING DETECTION AND DELAY ELEMENTS FOR ALL SIGNIFICANT PATHS THROUGH THE FACILITY. SAFEGUARDS SYSTEM DETECTION AND DELAY REQUIREMENTS ARE ESTABLISHED TO YIELD A DESIGN WHICH HAS NO CRITICAL PATH. ONCE CRITICAL PATHS ARE ELIMINATED, REPRESENTATIVES PATHS ARE SELECTED FOR DETAILED EFFECTIVENESS ANALYSES. THESE ANALYSES LEAD TO THE ESTABLISHMENT OF GUARD-FORCE REQUIREMENTS AND THE REVISION OF COMPONENT REQUIREMENTS. SYSTEM EFFECTIVENESS IS MEASURED BY THE PROBABILITY OF ADVERSARY SEQUENCE COMPLETION. FIGURES ILLUSTRATE THE SEQUENCE DIAGRAM AND EVALUATION. REFERENCES ARE PROVIDED. (TWK)