Power Plant Maintenance Investment Decision Making Based on Reliability, Availability, Maintainability and Risk Cost Case Study: Replacement Tube HRSG 1.2 Combine Cycle Power Plant Belawan

This study analyzes the feasibility of investing in the HRSG 1.2 replacement tube as a guide in making decisions based on reliability, availability, maintainability as an operational aspect, and risk cost as a risk aspect and analyzes the financial aspect. This feasibility analysis was carried out on 3 alternative options, namely just replacing the leaking HRSG 1.2 tube or corrective maintenance, doing the HRSG 1.2 tube replacement as a whole and doing the HRSG 1.2 tube replacement partially. In the analysis of operational aspects, it was obtained an increase in the reliability value of HRSG 1.2 by 0.137, an increase in the availability of HRSG 1.2 by 0.016 and an increase in the maintainability of HRSG 1.2 by 0.0006, so that it could increase operational performance combine cycle power plant block I. In the financial aspect analysis, capital budgeting was calculated which resulted in a net present value of IDR 360.419.186.184 and an internal rate of return of 7,51%. Meanwhile, in the risk aspect analysis, the risk cost value is below the risk appetite statement and in the moderate category. So that the investment work to maintain the HRSG 1.2 CCPP Belawan replacement tube is feasible to increase company value.