A Risk-Informed Approach to Linked Safety-Security Modeling

The requirements for U.S. nuclear power plants to maintain a large onsite physical security force contribute to their operational costs. The cost of maintaining the current physical security posture is approximately 10% of the overall operation and maintenance budget for commercial nuclear power plants. The goal of the Light Water Reactor Sustainability (LWRS) Program Physical Security Pathway is to develop tools, methods, and technologies and provide the technical basis for an optimized physical security posture. The conservatisms built into current security postures may be analyzed and minimized in order to reduce security costs while still ensuring adequate security and operational safety. The research performed at Idaho National Laboratory within LWRS Program Physical Security Pathway has successfully developed dynamic forceon-force (FOF) modeling framework using various computer simulation tools and integrates them with the dynamic assessment Event Modeling Risk Assessment using Linked Diagrams (EMRALD) tool....