Symptom-based approach for dynamic HRA and accident management

The paper presents symptom-based approach for dynamic Human Reliability Assessment (HRA) and accident management through holistic context evaluation by the Performance Evaluation of Teamwork (PET) method. The macroscopic context evaluation procedure of the PET method gives opportunity for correct definitions of emerging issues, challenges, and possible solutions in the field of HRA for errors of commission, dependency analysis, multi-unit considerations, long time window scenarios, digitalized main control room, etc. In addition, the measuring the durations for recognition and disregard of symptoms, depending on various Performance Shaping Factors (PSFs), by utilization of well-developed stimulus-response models on the microscopic level, and extended use of simulator data could improve the quality of HRA, accident analysis and Probabilistic Safety Analysis (PSA) respectively.