Hazid Modified

HAZID

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HAZID-กฏหมาย

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HAZID-Concept What are the hazards? What can go wrong and how?

What are the chance? What are the consequence?

HAZID further related to • Risk Assessment • Consequence Analysis • QRA 3

HAZID-Methods 1. Process hazards checklists

2. Hazards surveys 3. Hazards and operability (HAZOP) studies 4. Safety review (Meeting)

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Process Hazard Checklists

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Hazard Surveys Several subjects have been checked • General Layout • Building • Process • Piping • Equipment • Venting and Drain • Instrument and Electrical • Safety Equipment

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System description

Hazard Identification

HAZID (Safety Review)

Scenario identification

• All are qualitative discussion Accident probability

Accident consequence

Risk determination

Risk and/or hazard acceptance

Build and/or operate system

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General-Safety Study Identify

What hazards are present? Are people, the environment, Shell’s reputation, or assets exposed to these hazards?

Assess

Can the hazard be eliminated or minimized? What are the threats that can release the hazard? What are the credible scenarios and how likely are they? What are the potential consequences? What is the potential likelihood of the hazardous event? What is the risk?

Control

How are the hazards and their risks managed? What are the controls and barriers? How effective are the barriers and controls?

Recover

When a hazard is released, what are the recovery measures in place? How can the consequences be mitigated or minimized?

Identify What are the Hazards?

How to recover? What if it happens?

Recover

What could happen?

HSE Critical Procedures, Equipment & Tasks

HEMP

How serious will it be?

Assess

Risk Reduction Ideas Is there a better way?

How likely is it?

Control How to prevent it?

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HAZID Guideword Section 1: External and environmental hazards • Natural and Environment Hazards • Created (Man-made) Hazards • Effect of facility on the surroundings • Environmental Damage Section 2: Facility hazards • Control Methods and philosophy • Fire and explosion hazards • Process Hazards • Utility Hazards Section 3: Health hazards Section 4: Project implementation issues • Contract strategy (Schedule) • Competency (experienced) 9

HAZID-Worksheet

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When we have to address HAZID

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HAZID-Recommended method Job Description Conceptual Design Plant operation phase Basic Engineering phase Construction or start-up Plant Expansion Incident investigation Decommissioning

Method PHA HAZOP Fault Tree and Event Tree Checklists HAZOP FMEA and HRA What-if or checklists 12

Required data when you have to join Related Engineer

Example data

Process Engineer

Process Flow Diagram (PFD)Process Description Heat and Mass Balance Toxicology Data (MSDS)

Piping Engineer

Overall plot plan Unit plot plan Traffic Route study

Fire Fighting Engineer

Fire Fighting Equipment Layout

Civil Engineer

Draining concept Curb, Dike, Impound basin concept

Instrument Engineer

Fire and Gas Detector Layout

Safety Engineer

Safety Design Philosophy

Static Equipment, Rotating Equipment, Package Engineer

Magnitude cost of investment Operation concept 13

HAZID-Products What is the product from HAZID studies; • Critical Tasks and Activities • High Risk causes • Feasibility of causes can be eliminated • Safeguard • Who is responsible for that risks? • Input data for further risk study

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