The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant
Seismic risk has received increased attention since the 2011 Fukushima accident in Japan. The seismic risk of a nuclear power plant is evaluated via seismic probabilistic safety assessment (PSA), for which several methods are available. Recently, the discrete approach has become widely used. This ap...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573322005976 |
| _version_ | 1797839073224687616 |
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| author | Ji Suk Kim Man Cheol Kim |
| author_facet | Ji Suk Kim Man Cheol Kim |
| author_sort | Ji Suk Kim |
| collection | DOAJ |
| description | Seismic risk has received increased attention since the 2011 Fukushima accident in Japan. The seismic risk of a nuclear power plant is evaluated via seismic probabilistic safety assessment (PSA), for which several methods are available. Recently, the discrete approach has become widely used. This approximates the seismic risk by discretizing the ground motion level interval into a small number of subintervals with the expectation of providing a conservative result. The present study examines the effect of the number of subintervals upon the results of seismic risk quantification. It is demonstrated that a small number of subintervals may lead to either an underestimation or overestimation of the seismic risk depending on the ground motion level. The present paper also provides a method for finding the boundaries between overestimation and underestimation regions, and illustrates the effect of the number of subintervals upon the seismic risk evaluation with an example. By providing a method for determining the effect of a small number of subintervals upon the results of seismic risk quantification, the present study will assist seismic PSA analysts to determine the appropriate number of subintervals and to better understand seismic risk quantification. |
| first_indexed | 2024-04-09T15:52:21Z |
| format | Article |
| id | doaj.art-c6c36daadbe94ceda692657cce2c5e44 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-09T15:52:21Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-c6c36daadbe94ceda692657cce2c5e442023-04-26T05:56:29ZengElsevierNuclear Engineering and Technology1738-57332023-04-0155414201427The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plantJi Suk Kim0Man Cheol Kim1Department of Energy Systems Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, South KoreaCorresponding author.; Department of Energy Systems Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, South KoreaSeismic risk has received increased attention since the 2011 Fukushima accident in Japan. The seismic risk of a nuclear power plant is evaluated via seismic probabilistic safety assessment (PSA), for which several methods are available. Recently, the discrete approach has become widely used. This approximates the seismic risk by discretizing the ground motion level interval into a small number of subintervals with the expectation of providing a conservative result. The present study examines the effect of the number of subintervals upon the results of seismic risk quantification. It is demonstrated that a small number of subintervals may lead to either an underestimation or overestimation of the seismic risk depending on the ground motion level. The present paper also provides a method for finding the boundaries between overestimation and underestimation regions, and illustrates the effect of the number of subintervals upon the seismic risk evaluation with an example. By providing a method for determining the effect of a small number of subintervals upon the results of seismic risk quantification, the present study will assist seismic PSA analysts to determine the appropriate number of subintervals and to better understand seismic risk quantification.http://www.sciencedirect.com/science/article/pii/S1738573322005976Seismic probabilistic safety assessmentSeismic riskDiscrete approachDiscretizationGround motion level intervalsRisk underestimation |
| spellingShingle | Ji Suk Kim Man Cheol Kim The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant Nuclear Engineering and Technology Seismic probabilistic safety assessment Seismic risk Discrete approach Discretization Ground motion level intervals Risk underestimation |
| title | The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| title_full | The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| title_fullStr | The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| title_full_unstemmed | The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| title_short | The effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| title_sort | effect of the number of subintervals upon the quantification of the seismic probabilistic safety assessment of a nuclear power plant |
| topic | Seismic probabilistic safety assessment Seismic risk Discrete approach Discretization Ground motion level intervals Risk underestimation |
| url | http://www.sciencedirect.com/science/article/pii/S1738573322005976 |
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