calc of availability and un availability

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Component MTTR MTBF ngt 0.005952381 228.310502 168 4380 ogt 0.005952381 342.465753 168 2920 nge 0.010416667 1712.32877 96 584 oge 0.010416667 2283.10502 96 438 Generator g 0.041666667 50.2283105 24 19909.0909 Cable c 0.041666667 10 24 100000 System Symbol Mu = 1/MTTR Lamda X 10 -6 New Gas Turbine Old Gas Turbine New Gas Engine Old Gas

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OFFSHORE GERARD BOOKThe left side figures are based on following assumptions of mean time to repair and failure per year.ComponentSystem SymbolMu = 1/MTTRLamda X 10-6MTTRMTBFAADown TimeComponentFailure Rate Per YearDays Required To RepairAvailabilityUnAvailabilityNew Gas Turbinengt0.005952381228.310502283116843800.9630606860.036939314323.5883905013New Gas Turbine27Old Gas Turbineogt0.005952381342.465753424716829200.94559585490.0544041451476.5803108808Old Gas Turbine37New Gas Enginenge0.01041666671712.3287671233965840.85882352940.14117647061236.7058823529New Gas Engine154Old Gas Engineoge0.01041666672283.105022831964380.82022471910.17977528091574.8314606742Old Gas Engine204Generatorg0.041666666750.22831050232419909.09090909090.9987959720.00120402810.5472854641Generator0.441Cablec0.041666666710241000000.99976005760.00023994242.1018955451Cable0.08761

OFFSHORE GERARD BOOK (2)The left side figures are based on following assumptions of mean time to repair and failure per year.ComponentSystem SymbolMu = 1/MTTRLamdaMTTR HRSMTTR DAYMTTF= 1/LambdaMTBF = 1/lamda + 1/MhuAU = Hrs/YEARComponentFailure Rate Per YearDays Required To RepairAvailabilityUnAvailability1-U/8760MTTR x LambaNew Gas Turbinengt52.1428571429216870.50.51917808220.9616438356336New Gas Turbine27Old Gas Turbineogt52.1428571429316870.33333333330.35251141550.9424657534504Old Gas Turbine37New Gas Enginenge91.25159640.06666666670.07762557080.83561643841440New Gas Engine154Old Gas Engineoge91.25209640.050.06095890410.78082191781920Old Gas Engine204Generatorg3650.442412.27272727272.27546699880.998794520510.56Generator0.441Cablec3650.087624111.415525114211.41826484020.999762.1024Cable0.08761

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Sheet3