Pressurized Water Reactor (PWR)

Definition - What does Pressurized Water Reactor (PWR) mean?

A pressurized water reactor (PWR) is a nuclear power generator used to produce stream and drive a turbine based on water usage as a coolant and moderator.

Corrosionpedia explains Pressurized Water Reactor (PWR)

PWRs were initially designed to assist as propulsion devices for nuclear submarines. However, they are now commonly designed to use highly pure water to:

  1. Heat fluids and materials to very high temperatures.s
  2. Keep high pressures steady in a given application.
  3. Create steam which can be used to drive turbines.

Pressurized water reactors have two key characteristics: coolant loop separation from a steam system and pressure inside a primary coolant loop. It possesses two separate coolant loops (primary and secondary), which are both filled with deionized water. This refers to water without electrically charged ions.

Some advantages of PWR are:

  • Stable ease of operation
  • No radioactive contamination
  • Ability to externally shutdown via a passive medium
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