On the way to assess errors of commission

In January 2002, the OECD-NEA (Organization for the Economic Cooperation and Development, Nuclear Energy Agency) Working Group Risk (WGRISK) held a workshop at on Human Reliability data needs and potential solutions. The workshop was initiated to exchange the possibilities to proceed in the area of assessing errors of commission, those interventions of operators that are not required from the system point of view and aggravate the scenario evolution. A common sense in the research on errors of commission is that the respective HRA methods require a more profound database than the classical HRA methods. aper summarizes the discussion of the workshop. It discusses the various data sources and their use in HRA, the problems that make it difficult to get appropriate data for HRA, and possible approaches to overcome this bottleneck in HRA.