Supervision and Safety of Complex Systems

Chapter 14Risk Analysis and Management in Systems Integrating Technical, Human, Organizational and Environmental Aspects¹

 

 

 

14.1. Aims of the project

In its strategic risk analysis guidelines following the analysis of accident scenarios (such as Chernobyl, for instance), EDF identifies the need to look beyond technical aspects in risk analysis and consider organizational and human aspects. In this context, CRAN (the Research Center for Automatic Control of Nancy)¹ and EDF² have initiated research [LEG 09a] that has led to the development of an integrated risk analysis approach (IRA) based on a unified knowledge model using Bayesian networks. This model allows us to integrate technical information about systems — which are themselves composed of subsystems, each with a large number of interconnected views — and to include human aspects such as maintenance and control actions, since these are carried out in an organizational context that influences efficiency and safety (i.e. an evaluation of the effectiveness of maintenance barriers). In addition to this, the technical system is often subject to environmental hazards and regulatory constraints (hazards that develop over time) that require parameters affecting operational performance and demands to be considered. This has led to the integration of information related to these constraints in the IRA.

The MARATHON project, carried out with the cooperation of EDF and CRAN within the GIS 3SGS framework, has furthered research in ...