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Seismic Hazard Assessment for Selected Real Locality in Central Europe - Critical Points of Assessment

Citace: DANA, P., DEMJANČUKOVÁ, K. Seismic Hazard Assessment for Selected Real Locality in Central Europe - Critical Points of Assessment. In Transactions. Brussels: European Nuclear Society, 2012. s. 60-64. ISBN: 978-92-95064-15-7
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: Seismic Hazard Assessment for Selected Real Locality in Central Europe - Critical Points of Assessment
Rok vydání: 2012
Místo konání: Brussels
Název zdroje: European Nuclear Society
Autoři: Doc. RNDr. Procházková Dana DrSc. , Ing. Kateřina Demjančuková
Abstrakt EN: The seismic hazard value is a fundamental quantity for the seismic risk assessment and for the determination of terms of references of seismic design of important facilities as dams, chemical plants, nuclear power plants etc. In real sites the seismic hazard value is influenced by both, the earthquake sizes the impacts of which in a given site may be expected, and the properties of geological structure through which seismic waves spread from earthquake foci to a given site. The seismic risk is predetermined by hazard value, distribution of assets in the given site and by asset numbers and vulnerabilities. The paper describes usually used procedures of hazard assessment of important sites. Attention is paid to basic steps as data collection, the focal region boundaries and the maximum expected earthquake size in each focal region, because they substantially influence the hazard value. Discussion is concentrated to the attenuation that in Central Europe depends on the azimuth between earthquake focus and the given site. The attenuation differences are shown in seismic scenarios for individual focal regions. They are caused by focal mechanisms in near focal zone and by differences in structure properties in distant zone. The real results are given for a real locality in Central Europe. It is shown than that great influence on hazard value is caused by great differences in azimuth attenuation curves. It is reality that the Bohemian Massif is characterised with very low seismic attenuation in comparison with its vicinity. The following real results are presented: geological structure of near site vicinity, earthquake catalogue for Central Europe, focal regions in Central Europe, attenuation curves in Central Europe, typical earthquake isoseismals for individual focal regions, frequency graph, recurrence probability curve etc. The approaches used for nuclear facilities were recommended by the IAEA.
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