NPSAG- Nordic PSA-group - performed and ongoing research program

摘要

The Nordic PSA Group NPSAG was founded in December 2000 by the nuclear utilities in Finland and Sweden. In addition, the Swedish Nuclear Power Inspectorate (SKI) participates as an observer, and also takes part in the funding of many of the projects. NPSAG is intended to be a common forum for discussion of issues related to probabilistic safety assessment (PSA) of nuclear power plants, with focus on research and development needs. The group follows and discusses current issues related to PSA nationally and internationally, as well as PSA activities at the participating utilities. The group initiates and co-ordinates research and development activities and discusses how new knowledge shall be used. Important on-going activities concern CCF and dependent failures in general, as well as applications of PSA. hi addition, a general and quite extensive discussion has been initiated about data for PSA models. The discussion concerns a number of issues, ranging from types of data needed to future procedures for data collection, processing and analysis. Over the years, international contacts have increased, especially with partners in Europe (initiated by BWROG Associate program and EU-research contacts). This is in line with the group's aim to create a common and lasting basis for the performance of PSA and for risk informed applications of PSA in Europe. One important result is a common pilot project with VGB (Germany) on multi-national CCF data analysis. The paper gives an overview of NPSAG projects - past and present, and of the types of international contacts and information collection activities of the group.