Advanced Investigation of HRA Methods for Probabilistic Assessment of Human Barriers Efficiency in Complex Systems for a given Organisational and Environmental Context

摘要

This paper presents the major issues concerning PSA Human Reliability Analysis (HRA) as result of the first year of a PhD in the Department of Industrial Risks Management (IRM) of Electricite de France (EDF) in the field of Integrated Risk Analysis and HRA approaches for maintenance and normal operation. In particular, we will go deep into a "state-of-the-art" of HRA methods. We will proceed to the identification of some specific analysis criteria expressly designed to compare and map methods against the criteria itself and previous works on the good practices within HRA Such criteria deal with key issues such as the data/information/evidence required for methods to be applied, the theoretical basis underlying each method, PSF coverage (individual, operating crews or organizational) and so on. Then, we will discuss the major findings retained to provide an understanding on useful features and limitations or gaps in current HRA Examples of these limitations are lack of an adequate interface for using qualitative analysis results for quantification of HEPs or an appropriate guidance for how to assess and use PSFs. In particular, we will focus on the problem of selecting performance influencing factors (PSFs) for the use in HRA of nominal operation and maintenance tasks in a different manner than existing methods already developed at EDF which are used for specific PSA applications (MERMOS A). Finally, we will present the conclusions and some perspectives concerning the development of a new methodology resulting from a cross-fertilization approach between a tool recently developed at EDF R&D and referred as Integrated Risk Analysis (IRA) and conventional HRA The aim of this new methodology is to probabilistically assess human barriers efficiency in sociotechnical systems under given organizational and environmental conditions.