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[ pdf ] The Layer of Protection Analysis LOPA method

The Layer of Protection Analysis LOPA method Download
Topic under  SIL ( Safety Integrity Level )
Source: www.jlab.org 
File size: 60 kb
File type: pdf
Last download on: Fri May 04, 2018 08:50:35 AM
Short Desciption:
The Layer of Protection Analysis (LOPA) method is a Process Hazard Analysis tool. The method utilizes the hazardous events, event severity, initiating causes and initiating likelihood data developed during the Hazard and Operability analysis (HAZOP).

he LOPA method allows the user to determine the risk associated with the various hazardous events by utilizing their severity and the likelihood of the events being initiated. Using corporate risk standards, the user can determine the total amount of risk reduction required and analyze the risk reduction that can be achieved from various layers of protection. If additional risk reduction is required after the reduction provided by process design, the basic process control system (BPCS), alarms and associated operator actions, pressure relief valves, etc., a Safety Instrumented Function (SIF) may be required. The safety integrity level (SIL) of the SIF can be determined directly from the additional risk reduction required.
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