[논문]복합화력발전소 내 수소연료 저장설비의 안전관리 체계 구축을 위한 Bow-tie 기법을 활용한 반정량적 위험성 평가

박희경; 정시우; 최유정; 이민철

doi:10.14346/jkosos.2024.39.2.75

[국내논문] 복합화력발전소 내 수소연료 저장설비의 안전관리 체계 구축을 위한 Bow-tie 기법을 활용한 반정량적 위험성 평가
Semi-quantitative Risk Assessment using Bow-tie Method for the Establishment of Safety Management System of Hydrogen Fuel Storage Facility in a Combined Cycle Power Plant 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.39 no.2, 2024년, pp.75 - 86

박희경 (인천대학교 안전공학과) , 정시우 (인천대학교 안전공학과) , 최유정 (인천대학교 안전공학과) , 이민철 (인천대학교 안전공학과)

Abstract ▼ AI-Helper

Hydrogen has been selected as one of the key technologies for reducing CO2 emissions to achieve carbon neutrality by 2050. However, hydrogen safety issues should be fully guaranteed before the commercial and widespread utilization of hydrogen. Here, a bow-tie risk assessment is conducted for the hydrogen fuel supply system in a gas turbine power plant, which can be a mass consumption application of hydrogen. The bow-tie program is utilized for a qualitative risk assessment, allowing the analysis of the causes and consequences according to the stages of accidents. This study proposed an advanced bow-tie method, which includes the barrier criticality matrix and visualized maps of quantitative risk reduction. It is based on evaluating the importance of numerous barriers for the extent of their impact. In addition, it emphasizes the prioritization and concentrated management of high-importance barriers. The radar chart of a bow tie allows the visual comparison of risk levels before/after the application of barriers (safety measures). The risk reduction methods are semi-quantitatively analyzed utilizing the criticality matrix and radar chart, and risk factors from multiple aspects are derived. For establishing a secure hydrogen fuel storage system, the improvements suggested by the bow-tie risk assessment results, such as 'Ergonomic equipment design to prevent human error' and 'Emergency shutdown system,' will enhance the safety level. It attempts to contribute to the development and enhancement of an efficient safety management system by suggesting a method of calculating the importance of barriers based on the bow-tie risk assessment.

Keyword

표/그림 (12)

그림 Fig. 1. The general structure of a Bow-tie diagram (BTD).
표 Table 1. 5 x 6 Risk matrix and risk classification criteria for risk evaluation
표 Table 2. Expert information participated in a risk assessment
그림 Fig. 2. Detailed criteria of a Bow-tie Barrier.
그림 Fig. 3. Layers of protection for hydrogen storage facility (The concept is adapted by the protection layer of AIChE-CCPS).
그림 Fig. 4. Indicative tolerability of risk indicated by radar chart.
표 Table 3. Criticality matrix for Bow-tie barrier
표 Table 4. Comparative of risk consequences before & after applying preventive barrier for hydrogen supplying system
표 Table 5. Comparison of fire risk consequences before & after applying mitigation barrier for hydrogen supplying system
표 Table 6. Comparison of explosion risk consequences before & after applying preventive barrier for hydrogen supplying system
표 Table 7. Radar chart for the result of Bow-tie risk assessment
그림 Fig. 5. Diagram of Bow-tie analysis.

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