ABSTRACT
In Japan all major trouble in nuclear power plants must be reported to the Ministry of International Trade and Industry (MITI). These reports are reviewed and classified according to their causes. There have been 188 incidents caused by human error in various nuclear power plants in 25 years. To analyse these incidents, the Human Factors Research Center (HFC) of the Central Research Institute of the Electric Power Industry (CRIEPI) proposed a human-error analysis method named J-HPES (the Japanese version of the Human Performance Enhancement System) (Takano, Kabetani, and Iwai, 1994). J-HPES is a kind of root-cause analysis method based on procedure manuals. This method was programmed into a computer application named the J-HPES Assistance and Evaluation Support System (JAESS). The HFC has already analysed all 188 reports on incidents due to human error. With the JAESS program the results of the analysis are compiled in machine readable formats. These data are now converted into more general formats, such as the Comma Separated Values (CSV), and can be read with any kind of application for statistics and spreadsheets. The HFC
is now analysing these results from various perspectives. In this chapter we show the framework of the J-HPES/JAESS and some preliminary results of our analysis.
