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Applying LOPA and fuzzy logic to identify SIL requirement for safety critical functions in a direct reduction iron industry
- Source :
- Alexandria Engineering Journal, Vol 59, Iss 5, Pp 3575-3585 (2020)
- Publication Year :
- 2020
- Publisher :
- Elsevier, 2020.
-
Abstract
- LOPA11 All acronym meanings can be found in the nomenclature table at the end of the article. (Layer of Protection Analysis), is a semi-quantitative hazard analysis technique that can be used after a Qualitative Hazard Analysis Techniques such as HAZOP (Hazard and Operability Analysis) technique, and before a QRA (Quantitative Risk Analysis). LOPA can be used to identify the rate of the SIL (Safety Integrity Level), which specifies the level of safety protection and consequently identifies if the safety system is reliable or requires extra protection layers.LOPA has been used in many industrial processes such as LNG (Liquefied Natural Gas), petroleum and petrochemical industries. This study aims at performing the HAZOP technique on a specific node of a DRI (Direct Reduction Iron) industry, followed by LOPA to have quantified results and to determine whether the available independent protection layers (IPLs) in the system are sufficient. Moreover, it identifies the outcome required by the SIL target. Finally, fuzzy logic method for risk assessment is used as an efficient way to estimate the severity and determine the SIL rate to be compared with the one obtained by LOPA study.
- Subjects :
- Hazard (logic)
Operability
Computer science
Hazard and operability study
020209 energy
General Engineering
Safety Integrity Level
LOPA
02 engineering and technology
Hazard analysis
Engineering (General). Civil engineering (General)
01 natural sciences
Fuzzy logic
010305 fluids & plasmas
Reliability engineering
Risk analysis (business)
0103 physical sciences
DRI
0202 electrical engineering, electronic engineering, information engineering
HAZOP
TA1-2040
Risk assessment
Liquefied natural gas
Subjects
Details
- Language :
- English
- ISSN :
- 11100168
- Volume :
- 59
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Alexandria Engineering Journal
- Accession number :
- edsair.doi.dedup.....c81381842e24190c4b253418b97a3fbf