Skip Navigation COURSE:  IS-3 
Nuclear Power Plant Accidents
LESSON:  Types of Nuclear Reactors
FEMA Emergency Management Institute
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There are two main types of commercial nuclear reactors used in power plants in the United States:

  • Boiling Water Reactors (BWRs)
  • Pressurized Water Reactors (PWRs)
In addition to the PWR and BWR systems, there are several other types of systems in use, or under development, throughout the world.

Diagrams of Boiling Water Reactor and Pressurized Water Reactor.

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