.IEEE Std 1082-2017 pdf download – IEEE Guide for Incorporating Human Reliability Analysis into Probabilistic Risk Assessments for Nuclear Power Generating Stations and Other Nuclear Facilities.
3.2.1 PRA compatibility The HRAprocess proposed is suitable to all levels of a PRAgiven defined human failure events. If these are not defined, then this guidance cannot be applied successfully. The risk focus of a PRA requires the quantitative results of an HRA to be probabilistic in nature. Applications of PRAs to risk management efforts require that the HRA documents in sufficient detail the analyst’s human factors considerations for the human failure events. The PRA can have a diverse range of applications, the objectives of which may not be completely identified prior to the assessment. The HRA process should be flexible enough to anticipate some of the likely applications of the results of the HRA. For example, this may include design changes, procedure changes, training development, safety evaluations, or technical specification modification. 3.2.2 Qualitative HRA While the approach identified in this guide supports HRA quantification as part of the PRA, it should be noted that there is an increasing emphasis on the importance of qualitative HRA [B15], i.e., HRA that does not produce a human error probability, but rather insights into the human’s role and contribution to overall system performance. The HRA approach in this guide supports both qualitative and quantitative aspects of HRA. For PRA, the quantitative approach should be adopted. For non-PRA applications of HRA, steps relevant to quantification should be omitted as appropriate. 3.2.3 The relationship of approach to results Assumptions made by human reliability analysts about the relative importance of various human activities will influence the breadth and detail of models developed for the HRA. The data and chosen method of quantifying human interactions will influence the specific estimates or ranges of uncertainty obtained, although there is generally good agreement between HRA methods.