A Reliability-Based Mapping Scheme for Assessing System Operational Performance With Erroneous Human Behavior at NPPs

In the paper we present a reliability-based mapping scheme for underlying erroneous human behavior recognition with the intention of retrospective operational audit and safety management in nuclear power plants. For implementing the reliability-based mapping scheme, a success-oriented GO-FLOW method is applied to model, quantify and identify the erroneous human behaviors and associated system configuration changes. The retrospective investigation of human error is illustrated with a simulated example case event of loss of dual residual heat removal pumps during the refueling outage of nuclear power plants. The case study shows that human-system configuration changes in multiple task sequences can be easily captured by GO-FLOW method for post-hoc reviewing analysis.