M.Arsovski

Probabilistic Seismic Hazard Analysis for NPP Sites in Eastern Europe

D. Petrovski, S. Stamatovska, K. Talaganov & A. Paskalov Institute of Earthquake Engineering and Engineering Seismology, IZIIS University “Ss. Cyril and Methodius”, Skopje, Republic of Macedonia

D. Hadzievski Seismological Observatory, Faculty Natural Sciences and Mathematics, University “Ss. Cyril and Methodius”, Skopje, Republic of Macedonia

Institute of Earthquake Engineering and Engineering Seismology, IZIIS University “Ss. Cyril and Methodius”, Skopje, Republic of Macedonia

Probabilistic hazard analysis has been used as a tool for evaluation of safety of nuclear power facilities. The results from probabilistic hazard analysis can be used for quantification of a plant's seismic design basis and probabilistic seismic risk assessment.

In the past, the determination of the seismic design basis was as peak ground acceleration corresponding to the maximum intensity or as 84th percentile peak ground acceleration for the NPPs in Eastern European countries. Recently, efforts have been made to increase the level of safety of these NPPs. Therefore, the application of probabilistic seismic hazard analysis for re-evaluation of seismic input parameters for existing NPPs has increased.

Seismic hazard studies for several existing NPP sites have been performed and the hazard curves with central tendency have been determined for quantification of the plant’s seismic design basis.

In this paper acquired experiences in the probabilistic seismic hazard analysis of several NPP sites in Easter Europe are presented.

KEYWORDS: Hazard analysis, Seismic source, Magnitude-frequency relationship, Ground motion Attenuation, Hazard curve, Response spectra, Peak ground acceleration.