Given the growing dependence on human life and the daily need for electricity, the quality and reliability of this energy is crucial so that it is always available to consumers as a necessity. Since high percentages of electricity are supplied through gas, steam, and combined cycle power plants, combined cycle power plants also play an important role in generating electricity, with high efficiency compared to gas and steam power plants, The main reason for the expansion of their use is due to the high efficiency of the combined cycle power plant because the heat energy generated by combustion in the gas turbine is sent to the steam turbine boiler for use in the steam turbine, because The whole mechanical, combined cycle power plant system It is more complex than a gas or steam power plant, so it is necessary to properly consider and evaluate this complex before it can be significantly available. This availability is strictly related to the maintenance and repair plans of the plant. Since maintenance policies suffer from significant interference and cost overruns, the move to condition-based maintenance and reliability-based maintenance can be justified. In this study, the main components of the combined cycle power plant have been evaluated in terms of reliability, accessibility and economic index and prioritized on the basis of risk index. In the next step, critical cases have been identified and effective remedial measures have been proposed. The implications of these measures have also been discussed.
