Development of a flow intrusion model for effectiveness evaluation in nuclear power plant security system

Abstract

The fundamental purpose of the security system in a nuclear power plant is to thwart any adversary attempting to breach the facility by means of detection, delay, and response. This study introduces a novel flow intrusion model (FIM) that integrates the EASI method and Bayesian Attack Tree to assess the effectiveness and sensitivity of the security system. In contrast to the conventional effectiveness evaluation technique, which utilizes the enumeration method to compute the vulnerable path, the FIM method concentrates on a thorough analysis of the dynamic and static risks inherent in the security system. To facilitate a practical analysis of the FIM, a minimum case is presented.