The Advanced Pressurized Water Reactor (APWR) is a four-loop PWR developed jointly by a group of Japanese utilities, Mitsubishi Heavy Industries (MHI) and Westinghouse, that relies on a combination of active and passive safety systems. It is currently made available by MHI. The high-capacity APWR, with 1534 MWe (1700 MWe in Europe and the US), takes advantage of economies of scale and uses high-performance steam generators and low-pressure turbines with very large last-stage blades. The APWR allows operation with long fuel cycles, and increased flexibility such as the use of low-enriched fuel in order to reduce uranium requirements, the use of MOX cores and high burn-up fuels. The neutron economy and the long-term reliability of the reactor vessel have been improved with the use of a neutron reflector. The container includes a steel liner to prevent leakage surrounded by the concrete structure that provides structural protection. As in other evolutionary designs, the con­struction of the APWR also takes advantage of modularization and advanced design, simulation and management computer programs. Two APWRs are planned to be built at Tsuruga-3 and 4 in Japan, and several more in the United States.