DOI QR코드

DOI QR Code

The comparative risk assessment of LNG tank designs using FTA

고장수목분석법을 이용한 액화천연가스 저장탱크 형식별 위험성 비교 평가

  • Lee, Seung Rim (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Han Sang (Department of Mechanical and Automotive Engineering, Gachon University)
  • 이승림 (한국가스안전공사 가스안전연구원) ;
  • 김한상 (가천대학교 기계.자동차공학과)
  • Received : 2012.11.13
  • Accepted : 2012.12.25
  • Published : 2012.12.31

Abstract

Building above-ground membrane LNG storage tanks have been recently actively reviewed because they have advantages in ease of large capacity, environmental friendliness, and low possibility of gas leakage of the inner tank (slow increase of leakage speed). In this paper, the safety of membrane LNG storage tanks was ensured through comparative risk assessment of full-containment LNG storage tanks and membrane LNG storage tanks by using Fault Tree Analysis (FTA). Risk assessment results showed that both types of tanks have very similar level of risk except for the membrane storage tanks without additional safety equipments (early model).

최근 LNG 저장탱크 시장에서는 지상식 멤브레인 LNG 저장탱크의 대용량화 용이성, 친환경성, 내부탱크로부터의 낮은 누출 가능성(완만한 누출속도의 증가) 등의 장점으로 동 탱크의 건설에 대한 적극적인 검토가 이루어지고 있다. 이 논문에서는 고장수목분석법(FTA)을 활용하여 기존의 완전방호식 LNG 저장탱크와의 비교 위험성평가를 통해 멤브레인 LNG 저장탱크의 안전성을 분석하였다. 위험성평가 결과는 추가적인 안전장치를 갖지 않는 초기 멤브레인 LNG 저장탱크를 제외하고 두 형식의 LNG 저장탱크가 매우 유사한 위험수준을 가지는 것으로 나타났다.

Keywords

References

  1. Y.W. Ma, S.R. Lee, K.B.Yoon, "The investigation of accidental case for LNG terminal", KIGAS Vol. 10, No.4, pp.47-51, (2006)
  2. EN 1473(Installation and equipment for liquefied natural gas - Design of onshore installations), CEN, (1997)
  3. BS EN 14620-1-5(Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between $0{^{\circ}C}$ and -$165{^{\circ}C}$), CEN, (2006)
  4. SN Technigaz and AEA Technology, "Quantification and comparison of the risk of LNG storage concepts-membrane and full containment", LNG 12(Perth, Australia), (1998)
  5. Tokyo Gas Co., Ltd., "Quantitative risk assessment of LNG above-ground tanks based on past operating records of LNG regasification terminals and life cycle assessment", WGC 2003(Tokyo, Japan), (2003)
  6. S. R. Lee, J. W. Cho, B. K. Kwon, "A study for the safety improvement of above ground membrane LNG storage tanks", KIGAS 2004 fall conference, pp.123-129, (2004)

Cited by

  1. Prediction of Fatigue Life for a 270,000 kl LNG Storage Tank According to Shape of Corner-protection Knuckle vol.18, pp.2, 2014, https://doi.org/10.7842/kigas.2014.18.2.69