Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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Application of Target Reliability Levels for Maintenance of Domestic Natural Gas Pipelines

국내 천연가스배관 유지관리를 위한 목표신뢰도 적용사례

  • Lee, Jin-Han (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Jeong-Hwan (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Jo, Young-Do (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Lae Hyun (Department of Chemical and Biomolecular Engineering, Seoul National Univ. of Technology)
  • 이진한 (한국가스안전공사 가스안전연구원) ;
  • 김정환 (한국가스안전공사 가스안전연구원) ;
  • 조영도 (한국가스안전공사 가스안전연구원) ;
  • 김래현 (서울과학기술대학교 화공생명공학과)
  • Received : 2017.11.04
  • Accepted : 2018.06.07
  • Published : 2018.06.30
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Abstract

Reliability based design and assessment (RBDA) methodology is one of the newest directions of natural gas pipeline design method. Reliability targets are used to ensure that safety levels are met relevant limit states in the stage of design and maintenance. The target reliability for ultimate limit states such as large leak and rupture were developed using tolerable risk criteria for individual and societal risk. This paper shows the reliability target can be met through the implementation of periodic maintenance measures during the life cycle of the pipelines. The case study involves the calculation of the failure probability due to equipment impact, the calculation of the failure probability due to corrosion, and the estimation the re-inspection interval for domestic natural gas transmission pipelines.

신뢰도기반 설계 및 평가(RBDA) 방법론은 천연가스 배관을 설계하는 최신의 방법 중 하나이다. 신뢰도 목표는 설계와 유지관리 단계에 걸쳐 관계된 한계상태을 충족하는 안전수준을 가지는 지 확인하기 위해 사용된다. 목표 신뢰도는 대누출과 파단과 같은 극한한계상태에 대한 개인적 위험과 사회적 위험에서 사용하는 허용 가능한 위험수준을 적용하여 개발되었다. 본 논문에서 신뢰도 목표는 배관의 생애주기 동안 주기적인 유지관리를 적용함으로써 충족할 수 있음을 보여준다. 사례분석은 국내 천연가스 수송배관에 대한 굴착공사에 따른 손상확률 계산, 부식에 따른 손상확률의 계산, 그리고 재검사 주기의 추정을 포함한다.

Keywords

References

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