Commercial operation of the new plant at the Maizuru Power Station commenced on August 4, 2004. This facility has a state-of-the-art coal-fired supercritical power plant that boasts an output of 900 MW, and operates under steam conditions of 24.5 MPa and 595/595 degree-C. MHI supplied the major equipment for the facility including the boiler, steam turbine, control unit, etc. The boiler has a vertical tube furnace, and is of the radiant reheat once-through type with variable pressure operation.
The steam turbine is a reheat and regenerative condensing turbine with four flows in a cross-compound arrangement.

The plant features an improved power-generating efficiency.
In light of environmental issues of recent years, this facility utilizes high-temperature and high-pressure steam conditions, and applies efficiency-enhancing technology to the boiler and turbine in order to reduce the greenhouse gas, carbon dioxide.

The boiler is MHI's 10th boiler that utilizes a high-performance, high-reliability vertical water wall furnace featuring rifle tubes.

Compared to spiral wound water wall, vertical water wall with rifle-tube feature have the advantages of lower pressure drop, simplified structure, and less ash accumulation on the furnace walls. In order to realize a low NOx emissions, a circular firing boiler is applied with our state-of-the-art low NOx emissions system comprised of Mitsubishi Advanced-Pollution Minimum (A-PM) burner, Advanced-Mitsubishi Advanced Combustion technology (A-MACT) for an in-furnace NOx reduction, Mitsubishi Rotary Separator Pulverizer for high fineness, and Selective Catalytic NOx removal system (SCR). Other major features include the fact that it can accommodate bituminous coal procured from all over the world, and that it can achieve optimal steam temperature and combustion conditions from the different types of coal. It also utilizes the zone module construction method that enable to achieve the shorter construction schedule.

The steam turbine is of CC4F-46 cross compound type, while the high-pressure turbine is of double-flow design featuring four main steam inlets, each flow has one control stage and 10 reaction stages. The design of the intermediate-pressure turbine feature four reheating steam inlets, with each flow having seven reaction stages. The low-pressure turbine is a double-flow design, consisting of nine reaction stages including the last stages of 46-inch Integral Shroud Blade (ISB) for each flow. In order to achieve a high performance, three-dimensional blades are utilized for all of the reaction stages, and blades for both high and intermediate-pressure turbines have been upgraded to operate at high steam temperatures of 600 degree C. Further better performance are achieved by including an improved stationary blade seal fin structure for the low-pressure turbine and utilizing the grooved stationary blade for low-pressure last stage blade to boost moisture removal.