AP300™ SMR

Only SMR based on Licensed, Operating & Advanced Reactor Technology

The Westinghouse AP300™ Small Modular Reactor is the most advanced, proven and readily deployable SMR solution. Westinghouse proudly brings 70+ years of experience developing and implementing new nuclear technologies that enable reliable, clean, safe and economical sources of energy for generations to come.

Our AP1000® reactor is already proving itself every day around the globe. Currently, four units utilizing AP1000 technology are operating in China, setting performance records. Six more are under construction in China, and two AP1000 units are operating at Plant Vogtle in Georgia.

Our AP300 SMR leverages that operating experience, as well as tens of millions of hours on AP1000 reactor development.

Gain the benefits of the record-setting Westinghouse AP1000 PWR technology in a smaller power output to augment the backbone of your community energy system.

The AP300 SMR complements the AP1000 reactor for a cleaner energy mix, energy security, and grid flexibility and stabilization.


Based on Real-World Proven Technology

The AP300 SMR, 300MWe (990MWth), is based on the licensed and operating AP1000 pressurized light water technology that has demonstrated industry leading reliability.

The Westinghouse AP300 SMR delivers on the promises of small modular reactors: smaller scale, modular construction for efficient build schedules, state-of-the-art safety and reliability.

The benefits of basing AP300 on the proven AP1000 reactor include:

  • More than 30 years licensing advanced passive safety technologies with global regulators.
  • Utilizing an established infrastructure, including a mature supply chain and Operations & Maintenance services.
  • Westinghouse is a world leader in delivering nuclear fuel. AP300 SMR utilizes our robust fuel design that incorporates a variety of proven and advanced fuel features, and a four-year refueling cycle.
  • Uses advanced proven Instrumentation & Controls technology to simplify operations and increase reliability.

Advanced Safety

Westinghouse pioneered advanced passive safety systems and the AP300 SMR is based on the proven AP1000 passive safety systems that have been extensively analyzed and tested. Global regulators have reviewed these systems and determined that they meet advanced safety criteria.

  • Fail Safe Designed to achieve and maintain safe shutdown condition without operator action, back-up power or pumps
  • Self Sufficient Passive approach to safety system operation eliminates the need for backup power and cooling supply
  • Hazard Proof Protected by a robust containment designed to withstand extreme external hazards
  • Defense in Depth Multiple layers of defense for accident mitigation
Readily Deployable

The AP300 SMR has a proven pedigree throughout the plant lifecycle. For customers this means risk reduction leading to smoother deployment and operational success. Here is what Westinghouse can deliver:

Technology Readiness
Tens of millions of hours dedicated to AP1000 reactor development. Multiple AP1000 reactors operating and dozens pending.

Licensing Certainty
Based on licensed AP1000 technology. AP300 passive safety systems are backed by extensive testing.

Established Supply Chain
Incumbent AP1000 suppliers can deliver major equipment. Demonstrated capability to localize supply chain.

Modular Construction
Simplified, modular, ultra compact nuclear island (costliest portion of any reactor) reduces construction costs/schedule.

Reliable Operations & Maintenance
Record-setting AP1000 operational and outage performance. Targeting greater than 80-year life cycle.

Application Versatility

The AP300 SMR is the backbone of a community clean energy system. Flexible performance provides a proven capability to stabilize modern renewable heavy electric grids, including fast load change capabilities to support variations in demand. Includes additional capability to support district heating, desalination and hydrogen production.