US-APWR Overview

US-APWR Overview


The US Advanced Pressurized Water Reactor

The US-APWR grew out of the expertise gained by Mitsubishi’s design and construction of 24 PWRs in Japan.  This new design, specifically engineered for the United States, achieves superior safety, reliability, economy and compatibility with the environment.  

Improvements in the US-APWR over earlier designs include a thermal efficiency of 39%, the highest in the industry; a 20% reduction in plant building volume; and greater economy by increasing power generation capacity to 1,700 megawatts.

Because safety is the most important requirement of a nuclear power plant, the US-APWR incorporates numerous technical improvements to further enhance its safety features. The design philosophy of “independency and redundancy” is applied to the emergency core cooling system. The probabilistic safety analysis (PSA) technique has been applied to minimize the risk of accidents of all levels of severity and verify plant safety if an accident does occur.

Mitsubishi manufactures the heavy components of the primary system for the US-APWR in its Kobe Shipyard, which is uniquely capable of the task. The remaining 70% of the plant (such as compressors, small pumps, tanks, valves, process sensors, cranes, hoists, and HVAC), are comprised of items made in the US.

Based on extensive experience spanning over 50 years, Mitsubishi has provided reliable products and services for PWRs, nuclear fuels, advanced reactors and the nuclear fuel cycle.

Mitsubishi PWRs in Japan

Based on extensive experience spanning over fifty years, Mitsubishi Heavy Industries, Ltd. (MHI) has striven to provide reliable products and services in the fields of PWRs, nuclear fuels, advanced reactors, and the nuclear fuel cycle.