The HAZOP worksheet columns are described here below.
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Column
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Title
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Function
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1
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Deviation
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Defines which Deviation (combination of Parameter and Guideword) is under review.
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2
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Causes
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Describes what fault or change from normal operation gave rise to the deviation analysed.
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3
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Consequences
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Details the consequences of the deviation from normal operation.
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4
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Category
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Classify consequences: impact on Operation (O), Health and Safety (S) or Environment (E)
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5
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Safeguards
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Existing safeguards present to prevent and/or control the hazard
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6
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Notes
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Any additional information needed to better analyze/ describe the deviation under investigation.
Conditional modifiers shall be declared in case they have been applied for the likelihood evaluation.
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7
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Risk
Assessment
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S = consequence Severity, L = scenario Likelihood, R = Risk level
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8
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Recommendati ons
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Recommendations proposed by the HAZOP Team to improve the situation, e.g. agreed design changes, further studies or additional safety/operational procedures needed to prevent/control the hazard.
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9
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By
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Specialist/Dept. responsible for the implementation of the Recommendation.
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10
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Comments
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This column provides information regarding the Recommendation implementation such as document/P&ID revision in which the action was included, answer to a query included in the Recommendation, etc.
This column is required to confirm that there are no outstanding Recommendations open when the P&IDs are issued as ”For Construction”.
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