Seismic performance assessment of NPP concrete containments considering recent ground motions in South Korea

Chanyoung Kim, Eun Jeong Cha, Myoungsu Shin

Research output: Contribution to journalArticlepeer-review


Seismic fragility analysis, a part of seismic probabilistic risk assessment (SPRA), is commonly used to establish the relationship between a representative property of earthquakes and the failure probability of a structure, component, or system. Current guidelines on the SPRA of nuclear power plants (NPPs) used worldwide mainly reflect the earthquake characteristics of the western United States. However, different earthquake characteristics may have a significant impact on the seismic fragility of a structure. Given the concern, this study aimed to investigate the effects of earthquake characteristics on the seismic fragility of concrete containments housing the OPR-1000 reactor. Earthquake time histories were created from 30 ground motions (including those of the 2016 Gyeongju earthquake) by spectral matching to the site-specific response spectrum of Hanbit nuclear power plants in South Korea. Fragility curves of the containment structure were determined under the linear response history analysis using a lumped-mass stick model and 30 ground motions, and were compared in terms of earthquake characteristics. The results showed that the median capacity and high confidence of low probability of failure (HCLPF) tended to highly depend on the sustained maximum acceleration (SMA), and increase when using the time histories which have lower SMA compared with the others.

Original languageEnglish (US)
Pages (from-to)386-400
Number of pages15
JournalNuclear Engineering and Technology
Issue number1
StatePublished - Jan 2022


  • Earthquake characteristics
  • NPP concrete Containment
  • Seismic fragility analysis
  • Seismic probabilistic risk assessment
  • Spectral-matched time history

ASJC Scopus subject areas

  • Nuclear Energy and Engineering


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