probabilistic seismic assessment of base-isolated npps subjected to strong ground motions of tohoku earthquake
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2014
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Abstract
The probabilistic seismic performance of a standard Korean nuclear power plant (NPP) with an idealized isolation is investigated in the present work. A probabilistic seismic hazard analysis (PSHA) of the Wolsong site on the Korean peninsula is performed by considering peak ground acceleration (PGA) as an earthquake intensity measure. A procedure is reported on the categorization and selection of two sets of ground motions of the Tohoku earthquake, i.e. long-period and common as Set A and Set B respectively, for the nonlinear time history response analysis of the base-isolated NPP. Limit state values as multiples of the displacement responses of the NPP base isolation are considered for the fragility estimation. The seismic risk of the NPP is further assessed by incorporation of the rate of frequency exceedance and conditional failure probability curves. Furthermore, this framework attempts to show the unacceptable performance of the isolated NPP in terms of the probabilistic distribution and annual probability of limit states. The comparative results for long and common ground motions are discussed to contribute to the future safety of nuclear facilities against drastic events like Tohoku.
| Reference Key |
ali2014nuclearprobabilistic
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| Authors | ;AHMER ALI;NADIN ABU HAYAH;DOOKIE KIM;SUNG GOOK CHO |
| Journal | Journal of hazardous materials |
| Year | 2014 |
| DOI |
10.5516/NET.09.2014.030
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