Reliability Requirement Setting Model Used Management Action Selection Method for Tanker Machine System

Tungga Bhimadi

Reliability Requirement Setting Model or RRS model, was used in the tanker machinery system according to the calculation stage with the aim of getting the reliability value of each sub-system, for example the lubricating system. The value reliability of component and value of part of system reliability, were became positive values until one as the maximum value. The reliability value is obtained from the accumulation of reliability calculations beginning from determining the value of interval reliability, then value reliability of component and value of part of system reliability. Alignment of value of interval reliability value, to value reliability of component, was performed for each phase of 3 (three) phases from the total tanker operational period, namely: phase-1 mortality with lognormal distribution, phase-2 random failure with exponential distribution, phase-3 wire-out with Weibull distribution. Changes in the value of part of reliability system reliability were caused for example, by maintenance outside the schedule and hazard. The reliability value of this change can be calculated using the Management Action Selection Method or the MAS method. 4 (four) actions selection equations of MAS were carried out: innovation, resetting, harmonization, and revitalization. Tanker Machinery covers of the sub systems as follow: lubricant, starting air, sanitary and seawage, bilge and ballast, extinguisher, loading and unloading, cooling, and fuel.The calculation results of all the reliability of the Tanker machinery system from the RRS model was not obtained meet regulation. The MAS method was applied with the assumption of determining the overhaul and hazard periods. It was obtained until the value of part of reliability system for all machinery system meets regulation. Simulation of all machinery system for conditions according to regulations, was achieved by overhauling every 5 (five) years and also valve innovation every 5 (five) years. An effective increase on each of reliability value of sub system was obtained equal to 15 percent. Specifically, for cooling and fuel systems, the incremental of value of part of system reliability after implementing the MAS method could be achieved by 25 percent, and for lubricating system by 20 percent. Revitalization of components that require maintenance with a varied number of components, for example lubricating systems, was done at revitalization of 6(six) tanks, except for setting tank.

Volume 12 | Issue 2

Pages: 3471-3481

DOI: 10.5373/JARDCS/V12I2/S20201468