한국안전학회지 (Journal of the Korean Society of Safety)

  • 제27권5호
  • /
  • Pages.224-228
  • /
  • 2012
  • /
  • 1738-3803(pISSN)
  • /
  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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원자력발전소 비상전력계통 강화 방안에 따른 리스크 영향 평가

A Risk Impact Assessment According to the Reliability Improvement of the Emergency Power Supply System of a Nuclear Power Plant

  • 전호준 (한국수력원자력(주) 중앙연구원)
  • Jeon, Ho-Jun (Central Research Institute of Korea Hydro & Nuclear Power Co., Ltd.)
  • 투고 : 2012.06.20
  • 심사 : 2012.10.22
  • 발행 : 2012.10.31
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초록

According to the results of Probabilistic Safety Assessment(PSA) for a Nuclear Power Plant(NPP), an Emergency Power Supply(EPS) system has been considered as one of the most important safety system. Especially, the interests in the reliability of the EPS system have been increased after the severe accidents of Fukushima Daiichi. Firstly, we performed the risk assessment and the importance analysis of the EPS system based on the PSA models of the reference plant, which is the Korean standard NPP type. Considering a portable Diesel Generator(DG) system as the reliability reinforcement of the EPS system, we modified the PSA models and performed the risk impact assessment and the importance analysis. Although the reliability of the potable DG could be about 20% of the reliability of the alternative AC DG, we identified that Core Damage Frequency(CDF) was decreased by at least 4.6%. In addition, the risk impacts due to the unavailability of the EPS system on CDF were decreased.

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참고문헌

  1. 전호준 외 2명, "원자력발전소 비상전력계통의 리스크 영향 평가", 대한전기학회 하계학술대회논문집, 2012.
  2. 박창규, 하재주, "확률론적 안전성 평가", 브레인코리아, 2003.
  3. 한국수력원자력, 참조원전 확률론적 안전성 평가보고서, 2010.
  4. M.Modarres et al, "Reliablility Engineering and Risk Analysis, A Practical Guide", 1999.
  5. EPRI, Advanced Light Water Reactor Utility Requirements Document, Volume II, ALWR Evolutionary Plant Ch1, Appendix A Rev 7, 1995.