The Westinghouse combined cycle station design and development efforts have been continuing to respond to widespread User interest for the last twenty-five years. These combined cycle plants have accumulated considerable operating experience. The data base is currently available to confirm consistently high reliability and availability in the mature operating period. However, in order to achieve mature operation, a reliability/availability growth period must be considered in the planning of User and manufacturer. As evidenced by the data base, the scheduled outages continue to be the major availability detractor and this is the area that offers challenging opportunities to the User and manufacturer for future improvements.

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