Westinghouse Small Modular Reactor 
Small modular nuclear reactors (SMR) offer alternatives for providing affordable, secure sources of emissions-free generation to the world’s rapidly changing and diverse markets.

The Westinghouse SMR is a 225 megawatt integral pressurized water reactor with all primary components located inside the reactor vessel. Passive safety systems and proven components - realized in the industry-leading AP1000® plant design - are incorporated throughout to achieve the highest levels of safety and to reduce the number of components required. The Westinghouse SMR is fueled by an adaptation of the Westinghouse fuel design. It also leverages the latest U.S. Nuclear Regulatory Commission-licensed safety and security features.


 Thermal Output  

800 MWt

 Electrical Output  

> 225 MW

 Passive Safety Systems  

No operator intervention required for 7 days 

 Core Design  

17x17 Robust Fuel Assembly

8.0 ft / 2.4 m Active Length

< 5% Enriched U235

89 Assemblies

Soluble Boron and 37 Internal CRDMs

24 Month Refueling Interval

 Reactor Vessel Size  

Outer Diameter: 11.5 ft / 3.5 m

Height: 81.0 ft / 24.7 m
 Upper Vessel Package  

280 Tons / 254000 kg

 Containment Vessel Size  

Outer Diameter: 32.0 ft / 9.8 m

Height: 89.0 ft / 27.1 m

Fully Modular Construction
 Reactor Coolant Pumps  

8 External, Horizontally-Mounted Pumps

Sealless Configuration
 Steam Generator  

Recirculating, Once-Through, Straight-Tube


Integral to Vessel

 Instrumentation and Control  

OVATION®-based Digital Control System

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