SSPB activities on analyzing human performance problems

The SSPB Human Factors Group at the head office has been analyzing human error in a more systematic way since 1987. The purpose of collecting data is primarily to provide input to the experience feedback process. Through analysis of human error lessons can be learnt to prevent future human performance problems on the same plant and also on other plants. The human factors group reviews all SSPB plants LERs and scram reports on a continuous basis and identifies events related to human error. The same task is performed by the local safety and licensing department and the operation department at each unit. Human error related LERs and scrams are regularly evaluated by the HPES group at each site. The group consists of members from each unit, the safety and licensing department at the plant, and the human factors group. The severity of the event and the generalizability of the human performance problem is then used as a criteria for determining if a more thorough analysis of the event is needed. There are three levels of analysis: Statistical analysis, for minor events; Simplified HPES (developed by INPO for events with some safety importance or generalizability, approximately 1 event/year/unit); Complete HPES for significant events (1/year in Sweden). The HPES technique is still being tested for Swedish conditions and will be modified according to Swedish demands. For the purpose of estimating operator reliability for PRA studies failure data and expert judgments from instructors at the training simulator has been used for estimation of operator reliability. (author). 1 ref