[논문]개질형 On-Site 수소충전소의 리스크 감소를 위해 요구되는 SIL 등급 달성 방안에 관한 연구

이진호; 임재용

doi:10.14346/jkosos.2020.35.6.1

개질형 On-Site 수소충전소의 리스크 감소를 위해 요구되는 SIL 등급 달성 방안에 관한 연구
A Study on the Achievement of Required Safety Integrity Level to Reduce Risk for SMR On-Site Hydrogen Refueling Stations 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.35 no.6, 2020년, pp.1 - 8

이진호 (서울과학기술대학교 안전공학과) , 임재용 (서울과학기술대학교 안전공학과)

Abstract ▼ AI-Helper

In recent years, hydrogen has received much attention as an alternative energy source to fossil fuels. In order to ensure safety from the increasing number of hydrogen refueling stations, prevention methods have been required. In this regard, this study suggested an approach to reduce the risk of hydrogen refueling station by increasing Safety Integrity Level (SIL) for a Steam Methane Reformer (SMR) in On-Site Hydrogen Refueling Station. The worst scenario in the SMR was selected by HAZOP and the required SIL for the worst scenario was identified by LOPA. To verify the required SIL, the PFDavg.(1/RRF) of Safety Instrumented System (SIS) in SMR was calculated by using realistic failure rate data of SIS. Next, several conditions were tested by varying the sensor redundancy and proof test interval reduction and their effects on risk reduction factor were investigated. Consequently, an improved condition, which were the redundancy of two-out-of-three and the proof test interval of twelve months, achieved the tolerable risk resulting in the magnitude of risk reduction factor ten times greater than that of the baseline condition.

주제어

표/그림 (17)

그림 Fig. 1. SMR On-site hydrogen refueling station.
그림 Fig. 2. Hydrogen production system of SMR⁷⁾ 1) Reformer 2) Water Gas Shift 3) PSA.
그림 Fig. 3. HAZOP node of reformer.
그림 Fig. 4. Independent protection layer (IPL) used for LOPA.
표 Table 1. Risk matrix⁸⁾
표 Table 2. Safety integrity level^14,15)
표 Table 3. Target mitigated event likelihood TMEL
표 Table 4. SIS realistic failure rate
표 Table 5. HAZOP worksheet
표 Table 6. LOPA worksheet
그림 Fig. 5. Base condition SIS configuration.
그림 Fig. 6. Evaluation of RRF for redundancy sensors & final elements.
그림 Fig. 7. Evaluation of MTTFS for redundancy of sensors.
그림 Fig. 8. Evaluation of RRF for proof test intervals.
그림 Fig. 9. Improved SIS configuration.
표 Table 7. PFDavg. & RRF results for voting cases
표 Table 8. PFDavg. result of improved condition

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원문보기 상세보기

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