How much does it cost to maintain a power plant?

There are many factors involved, such as age, load, type of power, capacity, and environment.
For instance, the average cost of just fuel in a typical nuclear power plant is around $40 million (US) for 18 months.
The maintenance of a power plant includes parts, labour and ovehead for breakdown repairs, preventive maintenance and capital renewals, it does not include the fuel used to produce the power output of the plant. Maintenance costs for a thermal power plant is about 2 to 3% of replacement cost. So for a 2 billion dollar plant maintenance would be expected to be about 50 million dollars annually.