Quantifying human and organizational factors in accident management using decision trees: The HORMAN method

In the framework of the level 2 Probabilistic safety study (PSA2) project, the Institute for Nuclear Safety and Protection (IPSN) has developed a method for taking into account Human and organization Reliability Aspects during accident management. Actions are taken during very degraded installation operations by team of experts in the French framework of Crisis organization(ONC). After describing the background of the framework of the Level 2 PSA, the French specific Crisis Organization and the characteristics of human actions in the Accident Progression Event Tree, this paper describes the method developed to introduce in PSA the Human and Organizational reliability Analysis in Accident Management (HORAAM). This method is based on the Decision Tree method and has Gone through a number of steps in its development. A tool bases on Mathematica was developed to increase the flexibility and the efficiency of the study. © 2000 Elsevier Science Ltd. All rights reserved.