Reactor Design of SBWR

Natural Circulation

• Standard fuel, except 9-foot fuel length
• Long divided chimney above fuel
• No large nozzles below TAF

Six meter diameter vessel

• Minimizes vessel wall thickness
• Lower vessel construction cost
• Allows wider variety of manufacturers

Integral dryer-separator

• Allows single unit transfer to storage
• Minimizes storage requirements

Center mounted support skirt

• Enhances seismic performance
• Seals between upper and lower drywell
• Integrated Gravity Driven Cooling System (GDCS) nozzle

Integral fuel support and control rod guide tube

• Allows control rod removal without first removing fuel support
• Lower manufacturing cost

Elliptical upper and lower heads

• Minimize unnecessary height

Fine motion control rod drive (FMCRD)

• European and ABWR technology
• Reduce required periodic maintenance