Importance of human errors--a tool used to assign priority levels to reactor safety improvements

In probabilistic risk assessment studies much of the interest has been focused on the analysis of human errors. It is important in this analysis to concentrate on those categories of human error that have the greatest impact on reactor safety. The present paper discusses the results of a study made for the Ringhals 1 nuclear power plant, with regard to human errors. It is, furthermore, discussed how different priorities should be given to different reactor safety improvements