As a role of energy equipment manufacturers in dealing with environmental problems, in addition to energy resource issues and CO2 emissions control, there is increasing demand to reduce the environmental impact of products considering their lifecycle, namely cost reduction of power plant construction and operational cost. Mitsubishi Hitachi Power Systems, Ltd. (MHPS) has developed 50-inch and 60-inch titanium alloy blades, the world's largest blade length for full-speed (3,000 rpm and 3,600 rpm) steam turbines using the latest design and verification technologies. The construction of large coal-fired power plants applying these turbine blades has been completed in Poland and Korea. The commercial operation of these plants has commenced and they continue to operate stably. This paper describes the contents of the development design and verification test of the long blade and the outline of the applied power plant, and introduces some of the technology of MHPS's power plants.
