Probabilistic safety assessment of off-site power system under typhoon considering failure correlation between transmission towers

IF 9.4 1区工程技术 Q1 ENGINEERING, INDUSTRIAL

Reliability Engineering & System Safety Pub Date : 2024-11-08 DOI:10.1016/j.ress.2024.110637

Gungyu Kim , Shinyoung Kwag , Seunghyun Eem , Dae-gi Hahm , Jin Hee Park

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引用次数: 0

Abstract

High-intensity typhoons can cause failure to the structures, systems, and components of nuclear power plants (NPPs) and off-site power systems. Instances have occurred where failure of the off-site power system caused by typhoons has affected NPPs. The off-site power system has been in cases where a typhoon failed multiple transmission towers. In Korea, transmission towers have similar design criteria and material properties and experience similar wind characteristics, leading to a correlation in their failure probabilities. Assuming independent or totally dependent failure probabilities among the transmission towers is unrealistic. For a realistic PSA of the off-site power system due to typhoon-induced high winds, it is necessary to consider an appropriate failure correlation. This study performed a PSA of an off-site power system due to typhoon-induced high winds, considering the failure correlation between transmission towers. The failure correlation between transmission towers based on distance was calculated. The wind fragility of the off-site power system was convolved with the typhoon-induced high-wind hazard at the Kori NPP to calculate the probability of the NPP losing its power supply. Thus, applying the failure correlation of typhoon-induced high winds to the PSA of the off-site power system is considered realistic.

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考虑输电塔故障相关性的台风下场外电力系统概率安全评估

高强度台风可导致核电站和场外电力系统的结构、系统和组件发生故障。台风造成的场外电力系统故障曾影响过核电站。台风导致多座输电塔失效的情况也曾出现在场外电力系统中。在韩国，输电塔具有相似的设计标准和材料特性，并经历相似的风力特征，这导致其故障概率具有相关性。假设输电塔之间的故障概率相互独立或完全独立是不现实的。要对台风引发的大风造成的场外电力系统进行真实的 PSA，就必须考虑适当的故障相关性。本研究考虑了输电塔之间的故障相关性，对台风引起的大风导致的异地电力系统进行了 PSA。计算了基于距离的输电塔之间的故障相关性。将场外电力系统的风脆性与 Kori 核电站的台风诱发的大风危害进行卷积，计算出核电站失去电力供应的概率。因此，将台风引起的大风的故障相关性应用于场外电力系统的 PSA 是符合实际情况的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reliability Engineering & System Safety 管理科学-工程：工业

CiteScore

15.20

自引率

39.50%

发文量

621

审稿时长

67 days

期刊介绍： Elsevier publishes Reliability Engineering & System Safety in association with the European Safety and Reliability Association and the Safety Engineering and Risk Analysis Division. The international journal is devoted to developing and applying methods to enhance the safety and reliability of complex technological systems, like nuclear power plants, chemical plants, hazardous waste facilities, space systems, offshore and maritime systems, transportation systems, constructed infrastructure, and manufacturing plants. The journal normally publishes only articles that involve the analysis of substantive problems related to the reliability of complex systems or present techniques and/or theoretical results that have a discernable relationship to the solution of such problems. An important aim is to balance academic material and practical applications.