HAZOP Study and Layer of Protection Analysis Based Fuzzy System at Oil Distribution Unit, Surabaya- East Java

Ali Musyafa, Revina S. K. Pradana, Imam Abadi, Bambang Lelono Widjiantoro


The oil industry has an important role in sustaining community life. Green environment and zero accident will affect the environmental balance and sustainable development. The balance of the built environment to maintain the fuel supply system so it does not paralyze the transport system and community activities. It is closely related to the operational activities in the process of distribution of fuel oil (BBM) from the tanker to the charging on cars where the oil distribution impacts of high risk such as fire, explosion, leakage, and oil spills. Risk identification is done based LOP (Layer of Protection Analysis) A to display the value (SIL) Safety Integrity Level on several scenarios. SIL calculation encourages economic impact analysis based on modern software. Fuzzy systems are applied in the risk assessment on the fuel distribution system with multiple inputs that are reviewed from several aspects to produce output that is easily understood and reliable. (FLOPA) Fuzzy Layer of Protection Analysis appropriately used as expert-based risk assessment methods that show layers of protection are qualitatively and quantitatively. Rule base-based expert system used in FLOPA. The linkage between risk impacts on the level of Safety Integrity Level is known as a firm step in preventing environmental pollution. Probability economic impact FLOPA system used by management for decision making big impact on the economic resilience of the company and the needs of society. Evaluation is the guarantor of systems, assets, environment, and safe reputation for companies and governments for the creation of sustainable development so that environmental and green city as well as the economic sector to be smooth. This is evidenced by the rating node SIL 1 to 3, i.e. NO SIL, SIL 0, and SIL 1. In addition the results FLOPA economic impact on node 2 to 3 overall medium categories with total losses / year in the range of US $ 10,000 - US $ 100,000.


Hazop, fuel distribution, risk assessment, SIL, FLOPA

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A. Manual Book. (2016), PT. Petrokimia Gresik. Ammonia Plan I.

ANSI/ISA-TR84.02. 2002. Safety Instrumented Functions (SIF) –Safety Integrity Level (SIL)

EvaluationTechniques Part 1: Introduction. Research Triangle Park, NC: American National Standard Institute.

ANSI/ISA-TR84.00.02-2002 Part 3. Safety Instrumented Function (SIF) - Safety Integrity Level (SIL) Evaluation

Techniques Part 3: Determining the SIL of a SIF via Fault Tree Analysis. American National Standard Institute.

CCPS (Center for Chemical Process Safety). (2009). Guidelines for Developing Quantitative Safety Risk Criteria,

Appendix B. Survey of worldwide risk criteria Applications. New York, USA: AIChE.

Dowell, A. M. (1998). Layer of protection Analysis for determining safety integrity Level. ISA


Freeman, R. (2007). Using layer of protection analysis to define safety integrity level requirements. Process Safety

Progress, 26.

First, Kenneth. (2010).Scenario identification and evaluation for layers of protection analysis. Journal of Loss

Prevention in the Process Industries, 23, 705e718.

Going Bill, 2000. Advanced Control Steam Superheat Temperature on a Utility Boiler. IEEE Research Journal

Volume-3 Issue-2.

Guidance on “as low as reasonably practicable” (ALARP) decisions in control of major accident hazards

(COMAH). (2002). UK: Health and Safety Executive. Available at:http://www.hse.gov.uk

IEC- 61882. 2001. Hazard and Operability Studies (Hasp Studies) – Application Guide. Geneva: International

Electro technical Commission.

John N. Dyer, Anya P. Raibagkar, Massimiliano Kolbe, and Ernesto Solano “Blast Damage Considerations for

Horizontal Pressure Vessel and Potential for Domino Effects”, the Italian Association of Chemical Engineering,

Italy, 2012.

Johnson, R. W. (2010). Beyond-compliance uses of HAZOP/LOPA studies. Journal of Loss Prevention in the

Process Industries, 23(6), 727e733.

Khalil,M, et.al.. (2011). A cascaded fuzzy-LOPA risk assessment model applied in natural gas industry. Journal

of Loss Prevention in the Process Industries, 25, 877e882

Lassen, C. A. (2008). Layer of Protection Analysis (LOPA) for Determination of Safety Integrity Level (SIL). The

Norwegian University of science of Technology. Saroyan.

Montgomery, Douglas C “Introduction to statistical Quality Control 6th Edition”, United States of America.

M. Marshal, Edward and W. Scarp, Eric, “Safety Integrity Level Selection.” (United State of America: Research

Triangle Park, NC: ISA., 2002.

Musyafa, A. And Kristianingsih, L., “Risk Management and Safety System Assessment from Power Plant Steam

Boiler in Power Systems Unit 5, Paiton Indonesia”, Australian Journal of Basic and Applied Sciences, 7(11) Sep

, Pages: 349-356, 2013.

Musyafa, A. And Zulfiana, Erna., “Risk Management and Hazard and Operability Study on Steam Turbine Power

Plant Unit 5 in The Power Generation Paiton, East Java-Indonesia”, Advances in Natural and Applied Sciences,

(5) December 2013, Pages: 510-518, 2013.

Mustafa, A. ,at.al., “ Hazad And Operability Study and Analysis of Safety Integrity Level Case Study:

Ammonia Refrigerant Compressor at Petrochemical Plant” Advances in Natural and Applied Sciences, 9(8) July

, Pages: 36-42, AENSI Journals, 2015.

Mustafa, A., at.al. “Reliability and Maintainability Assessment of the Steam Turbine Instrumentation System for

optimization Operational Availability System at Fertilizer Plant”, Australian Journal of Basic and Applied

Sciences, 8(13) August 2014, Pages: 132-139, 2014.

. Musyafa, A. et.al. “Evaluation of the Reliability and Prediction Maintenance on the Air Compressor System in

Ammonia Plant PT. Petrokimia Gresik”, Australian Journal of Basic and Applied Sciences, 9(11) May 2015, Pages:

-862, 2015.

Poulose, Smear Maria, and Madhu, G., “Hazop Study for Process Plants: A Generalized Approach”, International

Journal of Emerging Technology and Advanced Engineering, 2012

Robert W. Johnson. “Beyond-compliance uses of HAZOP/LOPA studies”. Science Direct. Pp. 727-733., 2010.

Ronny D. Noriyati, et.al...“ Reliability Assessment of Cooling Pump For Parts Inventory Planning in Power Plant

System, Paiton-Indonesia”. Australian Journal of Basic and Applied Sciences, 8(13) August 2014, Pages: 140-146

AENSI ISSN: 1991-8178. Journal home page: www.ajbasweb.com, 2014.

Ronny Dwi Noriyati, et.al. “HAZOP Study and Determination of Safety Integrity Level Using Fault Tree Analysis

on Fuel Gas Superheat Burner of Ammonia Unit in Petrochemical Plant, East Java. Asian Journal of Applied

Sciences (ISSN: 2321 – 0893). Volume 05 – Issue 02, April 2017

Silvana R.Dacosta, at.al “Hazop Study and Fault Tree Analysis for Calculation Safety Integrity Level on Reactor-

C.5-01, Oil Refinery Unit at Balikpapan-Indonesia, Asian Journal of Applied Sciences (ISSN: 2321 – 0893),

Volume 05 – Issue 02, April 2017

Silvana D. Costa. et. al. “Evaluation Safety Integrity Level Using Layer of Protection Analysis in Recycle Gas

First Stage Cycle Compressor at PT. Pertamina Persero” ., Australian Journal of Basic and Applied Sciences,

(20) June 2015, Pages: 154-163, 2015.

Skrtic, Lana, “Hydrogen Sulfide, Oil and Gas, and People’s Health”, Energy and Resources Group University of

California, Berkeley. 2006.

. summers, Angela. “Safety Integrity Level: Do You Understand The Odds?” (Journal of Control Engineering, SISTECH

solution, LLC, 2000.

. The Norwegian oil industry association, OLF Recommended Guidelines for the application of IEC 61508 and IEC

in the petroleum activities on the Norwegian Continental Shelf, No.: 070 Date effective: 1.0 2, .2001.


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