Browse > Article
http://dx.doi.org/10.7734/COSEIK.2021.34.5.319

Feasibility Study of Seismic Probabilistic Risk Assessment for Multi-unit NPP with Seismic Failure Correlation  

Eem, Seunghyun (Department of Convergence and Fusion System Engineering, Kyungpook National University)
Kwag, Shinyoung (Department of Civil & Environmental Engineering, Hanbat National University)
Choi, In-Kil (Advanced Structural and Seismic Safety Research Division, Korea Atomic Energy Research Institute)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.34, no.5, 2021 , pp. 319-325 More about this Journal
Abstract
The 2011 East Japan Earthquake caused accidents at a number of nuclear power plants in Fukushima, highlighting the need for a study on the seismic safety of multiple NPP (Nuclear Power Plant) units. In the case of nuclear power plants built on a site that shows a similar seismic response, there is at least a correlation between the seismic damage of structures, systems, and components (SSCs) of nuclear power plants. In this study, a probabilistic seismic safety assessment was performed for the loss of essential power events of twin units. To derive an appropriate seismic damage correlation coefficient, a probabilistic seismic response analysis was performed. Using the external event mensuration system program, we analyzed the seismic fragility and seismic risk by composing a failure tree of multiple loss of essential power events. Additionally, a comparative analysis was performed considering the seismic damage correlation between SSCs as completely independent and completely dependent.
Keywords
multi-unit; correlation; system; seismic analysis; seismic performance; risk;
Citations & Related Records
연도 인용수 순위
  • Reference
1 US Nuclear Regulatory Commission (2014) Regulatory Guide 1.60: Design Response Spectra for Seismic Design of Nuclear Power Plants. c2014.
2 Ebisawa, K., Abe, K., Muramatsu, K., Itoh, M., Kohno, K., Tanaka, T. (1994) Evaluation of Response Factors for Seismic Probabilistic Safety Assessment of Nuclear Power Plants, Nucl. Eng. & Des., 147(2), pp.197~210.   DOI
3 Eem, S., Choi, I.K. (2019a) Influence Analysis of Seismic Risk due to the Failure Correlation in Seismic Probabilistic Safety Assessment, J. Earthq. Eng. Soc. Korea, 23(2), pp.101~108.   DOI
4 Eem, S., Choi, I.K. (2019b) Influence in Seismic Fragility of Systems due to Seismic Correlation, In EESK spring workshop, c2019. pp.115~116.
5 Eem, S., Choi, I.K., Cha, S.L., Kwag, S. (2021c) Seismic Response Correlation Coefficient for the Structures, Systems and Components of the Korean Nuclear Power Plant for Seismic Probabilistic Safety Assessment, Ann. Nucl. Energy, 150, 107759.   DOI
6 Eem, S., Kwag, S., Choi, I.K., Jeon, B.G., Park, D.U. (2021a) The Effects of Seismic Failure Correlaitons on the Probabilistic Seismic Safety Assessments of Nuclaer Power Plants, J. Earthq. Eng. Soc. Korea, 25(2), pp.53~58.   DOI
7 Kwag, S., Choi, E., Eem, S., Ha, J.G., Hahm, D. (2021) Toward Improvement of Sampling-based Seismic Probabilistic Safety Assessment Method for Nuclear Facilities using Composite Distribution and Adaptive Discretization, Reliab. Eng. & Syst. Saf., 107809.
8 Kwag, S., Eem, S., Park, J., Choi, I.K. (2020) Sampling-based Approach for Seismic Probabilistic Risk Assessment, J. Comput. Struct. Eng. Inst. Korea, 33(2), pp.129~136.   DOI
9 US Nuclear Regulatory Commission (1990) Procedures for the External Event Core Damage Frequency Analyses for NUREG-1150 (NUREG/ CR-4840). Washington, DC.
10 Eem, S., Choi, I.K., Yang, B., Kwag, S. (2021b) Methodology of Seismic Response Correlation Coefficient Calculation for Seismic Probabilistic Safety Assessment of Multi-unit Nuclear Power Plants, Nucl. Eng. & Technol., 53(3), pp.967~973.   DOI
11 Choi, G.G., Jung, W.S., Park, S.K. (2021) Sensitivity Study on the Correlation Level of Seismic Failures in Seismic Probabilistic Safety Assessments, Energ., 14(10), 2955.
12 Smith, P.D., Dong, R.G., Bernreuter, D.L., Bohn, M.P., Chuang, T.Y., Cummings, G.E., Smith, P.D., Dong, R.G., Bernreuter, D.L., Bohn, M.P., Chuang, T.Y., Cummings, G.E., Johnson, J.J., Mensing, R.W., Wells, J.E. (1981) Seismic Safety Margins Research Program, Phase I Final Report-Overview (No. NUREG/CR-2015 (VOL. 1)). Lawrence Livermore Laboratory, c1981.