Abstract
Integrated process of human error management in human factors engineering (HFE) process provides a systematic direction for the design countermeasures development to prevent potential human errors. The process analyzes performance influence factors (PIFs) for crew failure modes (CFMs) and human failure events (HFEvs) in human reliability analysis (HRA). This paper provides applications of the process to the event evaluation for nuclear power plant design, especially PWR. In this application, the HRA/HFE integrated process had specified further detail for PIF attributes which had not been obtained in HRA, and showed further investigations to treat how operators induced their human errors through their cognitive task process in their work environment. This application showed effectiveness of the process in order to provide design countermeasures for preventing potential human errors occurrence based on the extensive PIFs and their error forcing context in HRA.
Highlights
Human Factors Engineering (HFE) process is applied to control room design
It is effective if Human reliability analysis (HRA) assumptions, particulary qualitative analysis results (i.e., crew’s failure modes (CFMs)/performance influence factors (PIFs)) are directly communicated with HFE process not just by screening with risk importance thresholds, CFMs/PIFs which are currently used for human error probabilities (HEPs) calculations, are used for human system interface (HSI) development and procedure development as a design requirement in HFE process in order to minimize potential human error occurrences
This paper provides a study how to integrate HRA and HFE process by employing the latest HRA qualitative process (U.S.NRC, 2020), demonstrate the integration process with the sample event showing the difference in the current HRA quantitative analysis results
Summary
Human Factors Engineering (HFE) process is applied to control room design. Figure 1 shows a typical HFE process applied in control room design (U.S.NRC, 2012).Mashio & Ito: Application of Integrated Human Error Management in Human ...The current practice is to extract important human actions (RIHAs) in the “treatment of important human action” process by applying to risk-importance measures (U.S.NRC, 2007). The FV measures the overall percent contribution of containing particular event against the total risk, and is defined as FV = (CDFs with A)/(CDFs), where CDFs with A means all cut set of risks which A are involved. It is difficult to figure out what operator crew’s failure modes (CFMs) or their performance influence factors (PIFs) are involved in particular events. Human reliability analysis (HRA) aims to calculate human error probabilities (HEPs) tied with probabilistic risk analysis (PRA). For this purpose, HRA consists of two parts; qualitative analysis and quantitative analysis. The qualitative analysis identifies human failure events (HFEvs) in PRA events, analyzes each HFE to find out operator crew’s failure modes (CFMs) and their performance influence factors (PIFs) involved in each HFE.
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