대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제44권3호
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  • Pages.277-282
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  • 2024
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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소외전력망의 태풍 동반 강풍 확률론적 안전성 평가

Probabilistic Safety Assessment of Offsite Power System Under Typhoon-induced High Wind

  • 김건규 (경북대학교 융복합시스템공학과) ;
  • 곽신영 (국립한밭대학교 건설환경공학과) ;
  • 임승현 (경북대학교 융복합시스템공학과) ;
  • 진승섭 (세종대학교 건설환경공학과)
  • 투고 : 2023.12.07
  • 심사 : 2024.01.28
  • 발행 : 2024.06.01
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초록

최근 기후변화로 인해 태풍의 강도와 빈도가 증가하고 있으며, 태풍은 원자력발전소의 소외전원상실(LOOP)을 발생시킬 수 있다. 따라서, 태풍 동반 강풍에 대한 소외전력망의 확률론적 안전성 평가(PSA)를 통한 대비가 필요하다. 하지만, 원자력발전소의 소외전력망에 대한 태풍 동반 강풍 PSA 연구는 미흡한 실정이다. 본 연구에서는 국내원전부지 중 소외전력망의 피해가 잦았던 고리원전부지를 대상으로 소외전력망의 태풍 동반 강풍에 의한 PSA를 수행하였다. 태풍 동반 강풍에 의한 소외전력망의 PSA를 수행하기 위해 고리원전부지의 태풍재해도를 Logic Tree와 Monte Carlo Simulation을 활용하여 도출하였다. 전력망을 구성하는 요소의 취약도를 활용하여 전력망의 취약도 분석을 수행하였다. 최종적으로 소외전력망이 원자력발전소에 전력을 공급하지 못할 확률을 정량적으로 분석하였다.

Recently, the intensity and frequency of typhoons have been increasing due to climate change, and typhoons can cause a loss of offsite power (LOOP) at nuclear power plants (NPPs). Therefore, it is necessary to prepare for typhoon-induced high winds through the probabilistic safety assessment (PSA) of offsite power systems. However, research on PSA for offsite power system in NPPs under typhoon-induced high winds is still lacking. In this study, PSA was performed for offsite power systems subjected to typhoon-induced high winds at the Kori NPP site, which has experienced frequent damages to its offsite power system among NPP sites in Korea. In order to perform PSA for typhoon-induced high winds in offsite power systems, the typhoon hazard at Kori NPP site was derived using logic tree and Monte Carlo simulation. Utilizing the fragility of components constituting the power system, performed a fragility analysis of the power system. Lastly, the probability that offsite power system will not be able to supply power to the NPP was derived.

키워드

과제정보

This work was partly supported by Korea Institute of Energy Technology Evaluation and Planning(KETEP) grant funded by the Korea government(MOTIE)(No. 20224B10200050) and National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science and ICT) (No. RS-2022-00154571). This paper has been written by modifying and supplementing the KSCE 2023 CONVENTION paper.

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