Long-Term Performance of Safety Related Concrete Structures in Nuclear Power Plants

원전 콘크리트 구조물의 장기내구성능 평가

  • 윤의식 (한국원자력안전기술원 구조부지실) ;
  • 백용락 (한국원자력안전기술원 구조부지실) ;
  • 임재호 (한국수력원자력(주) 울진원자력본부 시설부) ;
  • 정연석 (한국원자력안전기술원 규제기술연구부) ;
  • 최강룡 (한국원자력안전기술원 구조부지실)
  • Published : 2006.11.04

Abstract

Almost 30 years have been passed since the first nuclear power plant was operated in Korea. Many studies have been actively conducted from the early 1990's in order to develop the deterioration management system for concrete structures in NPPs(Nuclear Power Plants) accordingly. Base on these studies, a systematic deterioration management program has developed and operated since 1997. According to this program, systematic inspections to provide database and evaluation were periodically performed (every overhaul at intervals of $12{\sim}18$ month and every five years). Accumulated deterioration database was usefully utilized for the NPP PSR (Periodic Safety Review). In this paper, the long-term durability and integrity of Kori 1,2 NPP concrete structures which are the oldest ones in Korea were evaluated based on the precise inspection database and regulatory inspection results including compressive strength, depth of carbonation, amount of chlorination and spontaneous potential of reinforcing bar, etc. It was noted that Kori 1,2 NPP structures have not any serious durability problems.

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