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- W2563147788 abstract "Process and Nuclear industries use Independent Protection Layers (IPLs) to prevent initiating abnormal events from becoming accidents. They form layers of protection that acts to prevent an abnormal situation from escalating. IPLs can be hardware (Basic Control System-BPCS) or operator actions, active (Safety Instrumented System-SIS) or passive (Dike walls) or a combination of all these factors. Safety Instrumented System (SIS) is the protection layer that comes in to action in case of failure of BPCS and operator action. Therefore reliability and ability of the SIS to respond should be higher than that of the layer like the BPCS. Reliability of SIS is usually specified in terms of Safety Integrity Level (SIL). The required SIL is calculated by analyzing the Probability of Failure of Demand (PFD) of all the IPLs in the case of an Initiating Event (IE) and comparing the Mitigated Consequence Frequency with a pre-established Tolerable Frequency (TF). The calculations involve probability of failure of each of layers and are usually done through spreadsheet or proprietary software. Bayesian methods are suited to handle these calculations due the nature of conditional probabilities inherent in the system. Further Bayesian methods can analyze the influencing factors affecting the PFD of the IPLs. This paper will present analysis of IPLs and its influencing factors using Bayesian methods including application of Common Cause Failures (CCF) and NoisyAnd distribution to Conditional Probability Tables (CPTs)." @default.
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- W2563147788 date "2015-01-01" @default.
- W2563147788 modified "2023-09-24" @default.
- W2563147788 title "ANALYSIS OF INDEPENDENT PROTECTION LAYERS AND SAFETY INSTRUMENTED SYSTEM FOR OIL GAS SEPARATOR USING BAYESIAN METHODS" @default.
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