Reliability, Availability, and Maintainability Analysis of Steam Drum Power Plant- PT YTL, East Java

PT Jawa Power is one of Indonesia’s largest independent power producers with a 30-year agreement with the State Electricity Company managed by YTL Power International Berhad, and it operates a 1,220-MW coal-fired power plant in Paiton, East Java. This steam power plant relies on a steam drum, which is a critical component of the boiler, to produce dry steam for the turbine. In this study, the RAM (Reliability, Availability, and Maintainability) of the Steam drum system was evaluated using maintenance data from 2019 to 2024 to optimize the performance and maintenance strategies. The RAM analysis begins by calculating TTF (Time to Failure), TTR (Time to Repair), determining the distribution, and calculating the RAM for each component based on the failure history. The control-level steam drum (50HAD10CL501) has the lowest reliability, reaching 60% after 350 hours of operation, while the Temperature Transmitter Economizer (50HAC53CT201) requires the longest repair time of 13 hours. Preventive maintenance analysis with failure rate was also conducted, and 1 component data was obtained that was recommended for maintenance, namely the Safety valve Steam drum component (50HAD10AA192/AA193/AA194/AA195/AA196) at a reliability level of 60% with a time interval of 9000 hours. This RAM study supports more effective and efficient maintenance planning to improve Steam Power Plant performance and can be implemented in other Steam Power Plant tool systems.