Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Risk Assessment and Improvement Methods Based on Hydrogen Explosion Accidents of a Power Plant and Water Electrolysis System

발전소 및 수전해 시스템의 수소 폭발 사고 사례 기반 위험성 평가 및 개선 방안 연구

  • MIN JAE JEON (Department of Safety Engineering, Incheon National University) ;
  • DAE JIN JANG (Department of Safety Engineering, Incheon National University) ;
  • MIN CHUL LEE (Department of Safety Engineering, Incheon National University)
  • 전민재 (인천대학교 안전공학과) ;
  • 장대진 (인천대학교 안전공학과) ;
  • 이민철 (인천대학교 안전공학과)
  • Received : 2024.01.31
  • Accepted : 2024.02.19
  • Published : 2024.02.28
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Abstract

This study addresses the escalating issue of worldwide hydrogen gas accidents, which has seen a significant increase in occurrences. To comprehensively evaluate the risks associated with hydrogen, a two approach was employed in this study. Firstly, a qualitative risk assessment was conducted using the bow-tie method. Secondly, a quantitative consequence analysis was carried out utilizing the areal locations of hazardous atmospheres (ALOHA) model. The study applied this method to two incidents, the hydrogen explosion accident occurred at the Muskingum River power plant in Ohio, USA, 2007 and the hydrogen storage tank explosion accident occurred at the K Technopark water electrolysis system in Korea, 2019. The results of the risk assessments revealed critical issues such as deterioration of gas pipe, human errors in incident response and the omission of important gas cleaning facility. By analyzing the cause of accidents and assessing risks quantitatively, the effective accident response plans are proposed and the effectiveness is evaluated by comparing the effective distance obtained by ALOHA simulation. Notably, the implementation of these measures led to a significant 54.5% reduction in the risk degree of potential explosions compared to the existing risk levels.

Keywords

Acknowledgement

이 논문은 2023년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(연구 번호: 00236869, 300 MW급(H급) 가스터빈 50% 수소혼소 변환 기술개발 및 실증).

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