Summary Report on OECD/NEA Seismic Workshops

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The Committee on the Safety of Nuclear Installations (CSNI) Working Group on Integrity and Ageing of Components and Structures (WGIAGE) has as a general mandate to advance the current understanding of those aspects relevant to ensuring the integrity of structures, systems and components, to provide for guidance in choosing the optimal ways of dealing with challenges to the integrity of operating as well as new nuclear power plants, and to make use of an integrated approach to design, safety and plant life management.

The WGIAGE's seismic sub-group was tasked with proposing an action plan to the CSNI detailing key seismic issues. The plan recommended the topics and content of the three ground-motion-related workshops – Engineering Characterisation of Seismic Input, the Relation Between Seismological Data and Seismic Engineering, and Seismic Input Motions Incorporating Recent Geological Studies. The workshops were conducted between November 1999 and November 2004. This report summarises the main findings and conclusions of the workshops and extracts the seismic information most relevant to current nuclear practice.