HPCL CPM 3-PCP 5-Risk Anaylsis & Hazop Studies- PPT.pptx

Pump will trip tank lorry filling will stop what is

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Pump will trip. Tank Lorry Filling will stop WHAT IS RISK REDUCTION, Initial Risk – 4x3 = 12 Final Risk – 3x2=6 Risk Reduction Factor = 12/6=2
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Risk – Frequency x consequence Probabili ty Consequ ence Minor -1 Significa nt -3 Major-6 Catastro phic-10 Frequenc y/yr Frequent -10 10 30 60 100 Probable- 8 8 24 48 80 Possible- 4 4 12 24 40 Unlikely-2 2 6 12 20 Remote-1 1 3 6 10
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Risk Prioritisation
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Risk Matrix
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Qualitative analysis – results: risk matrix Scenarios for consequence analysis are typically in the yellow zone But don’t forget to manage the scenarios in the green zone! Likelihood per year Limited damage Reversible damage Severe (fatalities) Catastrophe (off-site fatalities) e-3 e-4 e-5 e-6 e-7 e-8 Acceptable "ALARA", scenarios to be analysed on consequences Unacceptable Severity
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Risk Reduction and Management – MB Lal Committee a ) Carry out HAZOP and Quantitative Risk Assessment (QRA) on large sized installations through well qualified agency and implement recommendations forthwith. b) The Terminal Managers should be trained in Hazard Identification techniques and be familiarized with risk assessment and risk mitigation methods. c) Fire Protection system upgradation & automation .
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UNIT 2 Methods of Hazards Identification
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Hazard Identification is not Optional - IT’S AN ESSENTIAL PART OF DAY TO DAY ACCTIVITIES
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Inductive & Deductive Methods Two basic approaches : Deductive Method – Final event is assumed and the events that could cause this final event are then sought – Tyre burst in TT gantry , spillage etc Inductive Method – The failure of a component is assumed. The subsequent analysis identifies the events which this failure could cause - Whether a fire or safe dispersion of flammable mixture after a release
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Inductive & Deductive Classification Hazard Identification Method Process Remarks Checklist Deductive Apply previously developed checklist for known failure and deviations At any stage What if Deductive Uses relevant What If Questions by experienced persons Any stage HAZOP Deductive /Inductive Takes P & IDS for all conceivable deviations, searches for cause / consequences At any stage Fault Tree Inductive Structuring the consequences back to causes Usually after hazard is identified
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Hazard Identification Methods Method Systems Remarks Comparative Methods Check lists & Audits Extensively used in Oil Industry Fundamental Methods HAZOP Extensively used in Oil Industry Failure Logic Fault Tree , Event Tree, FMEA Cause Consequence Diagrams Relatively lower use
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Identification Methods Method Systems Remarks Comparative Methods Check lists & Audits Extensively used in Oil Industry Fundamental Methods HAZOP Extensively used in Oil Industry Failure Logic Fault Tree , Event Tree, FMEA
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Unit 3 What If Analysis Unit 3 What If Analysis
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What If Analysis What if Pre-prepared and customised questions on potential deviations.
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  • Fall '19
  • Safety engineering, fault tree, Hazards

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