Hazards Identification and Risk Assessment student

Hazards Identification and Risk Assessment student -...

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Hazards Identification and Risk Assessment Chemical Engineering 311
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Questions to be asked and answered: n What are the hazards? n What can go wrong and how? n What are the chances? n What are the consequences? The first question is ‘hazard identification’ and the following three questions are ‘risk assessment’.
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System Description Hazard Identification Scenario Identification Accident Probability Accident Consequences Risk Determination Risk Acceptable ? Build/Operate System Modify Design No Yes
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Process diagrams – block
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Process Flow Diagram (PFD)
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Piping & Instrumentation Diagram
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Example
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HAZOP – Hazards and Operability Study n Team: engineers, managers, operators n Systematically evaluate process components n Uses process parameters (e.g., flow, temperature) and guide words (e.g., no, more, less, reverse) n Investigate causes, consequences, adequacy of safety systems n Record recommendations. Action list.
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HAZOP – Hazards and Operability Study
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Risk Assessment n HAZOP identifies hazards, but does not quantify risk. n Procedures are needed that help us quantify risk so that we can focus our efforts on hazards with highest likelihood of occurring.
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n Uses logic diagrams to outline sequence of events that will lead to damage or failure. n
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Hazards Identification and Risk Assessment student -...

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