A SSHAC Level 3 Probabilistic Seismic Hazard Analysis for a New-Build Nuclear Site in South Africa
| Autor: | Kathryn L. Hanson, Frank Scherbaum, Fleur O. Strasser, Kevin J. Coppersmith, Azangi Mangongolo, Refilwe Shelembe, Ellen M. Rathje, Ryan Coppersmith, Adrian Rodriguez-Marek, Peter J. Stafford, Johann Neveling, Julian J. Bommer |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Institut für Erd- und Umweltwissenschaften
010504 meteorology & atmospheric sciences Induced seismicity 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Hazard law.invention Physics::Geophysics Geophysics Nuclear site law Nuclear power plant Probabilistic seismic hazard analysis Geology Seismology 0105 earth and related environmental sciences |
| Zdroj: | Earthquake Spectra |
| Popis: | A probabilistic seismic hazard analysis has been conducted for a potential nuclear power plant site on the coast of South Africa, a country of low-to-moderate seismicity. The hazard study was conducted as a SSHAC Level 3 process, the first application of this approach outside North America. Extensive geological investigations identified five fault sources with a non-zero probability of being seismogenic. Five area sources were defined for distributed seismicity, the least active being the host zone for which the low recurrence rates for earthquakes were substantiated through investigations of historical seismicity. Empirical ground-motion prediction equations were adjusted to a horizon within the bedrock at the site using kappa values inferred from weak-motion analyses. These adjusted models were then scaled to create new equations capturing the range of epistemic uncertainty in this region with no strong motion recordings. Surface motions were obtained by convolving the bedrock motions with site amplification functions calculated using measured shear-wave velocity profiles. |
| Databáze: | OpenAIRE |
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