SEISMIC FRAGILITY ANALYSIS OF A NUCLEAR BUILDING BASED ON PROBABILISTIC SEISMIC HAZARD ASSESSMENT AND SOIL-STRUCTURE INTERACTION ANALYSIS
36th Annual CNS Conference - 2016 June 19-22


Presented at:
36th Annual CNS Conference
2016 June 19-22
Location:
Toronto, Canada
Session Title:
Session T4A: Probabilistic and Seismic Assessments

Authors:
R. Gonzalez (SNC-Lavalin Inc.)
S. Ni (SNC-Lavalin Group)
R. Chen (SNC-Lavalin Group)
M. Han (SNC-Lavalin Group)
D. Mullin (New Brunswick Power)
  

Abstract

Seismic fragility analyses are conducted as part of seismic probabilistic safety assessment (SPSA) for nuclear facilities. Probabilistic seismic hazard assessment (PSHA) has been undertaken for a nuclear power plant in eastern Canada. Uniform Hazard Spectra (UHS), obtained from the PSHA, is characterized by high frequency content which differs from the original plant design basis earthquake spectral shape. Seismic fragility calculations for the service building of a CANDU 6 nuclear power plant suggests that the high frequency effects of the UHS can be mitigated through site response analysis with site specific geological conditions and state-of-the-art soil-structure interaction analysis. In this paper, it is shown that by performing a detailed seismic analysis using the latest technology, the conservatism embedded in the original seismic design can be quantified and the seismic capacity of the building in terms of High Confidence of Low Probability of Failure (HCLPF) can be improved.

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