Pressurized Water Reactor – UPSC Prelims

Pressurized Water Reactor:
  • It is a type of light water reactor that uses ordinary water as the moderator and coolant.
  • The PWR plant is the most common type of nuclear power reactor in the world.
  • The Pressurised Heavy Water Reactors (PHWRs) are fuelled by Natural Uranium while Light Water Reactors (LWRs) are fuelled by Low Enriched Uranium.
  • A PWR has two water systems:
    • Reactor (primary) system that retrieves heat generated in the reactor.
    • Turbine (secondary) system that produces electric power with steam generated by that heat.
Previous Year Questions:
The function of heavy water in a nuclear reactor is to (2011)
(a) Slow down the speed of neutrons
(b) Increase the speed of neutrons
(c) Cool down the reactor
(d) Stop the nuclear reaction
Ans: (a)