Context

• Recently, the third unit of the Kakrapar Atomic Power Project (KAPP-3)in Tapi district of Gujarat achieved its first 
• KAPP-3 is the country’s first 700 MWe (megawatt electric) unit,and the biggest indigenously developed variant of the Pressurised Heavy Water Reactor (PHWR).

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About Pressurised Heavy Water Reactor (PHWR)

• Pressurised Heavy Water Reactor (PHWR) is a nuclear power reactor,commonly using unenriched natural uranium as its fuel, that uses heavy water (deuterium oxide D₂O) as its coolant and moderator.
• The Pressurised Heavy Water Reactors (PHWRs) are fuelled by Natural Uranium while Light Water Reactors (LWRs) are fuelled by Low Enriched Uranium.
• Fission is a process in which the nucleus of an atom splits into two or more smaller nuclei, and some byproduct.

List of Nuclear Power Plants in India:

1. Tarapur- Maharashtra

Type: Boiling water reactor (BWR) & Pressurized heavy water reactor (PHWR)

2. Rawatbhata- Rajasthan

Type: Pressurized heavy water reactor (PHWR)

3. Kudankulam- Tamil Nadu

Type: Water-Water Energetic Reactor (VVER)-1000

4. Kaiga-Karnataka

Type: Pressurized heavy water reactor (PHWR)

5. Kakrapar– Gujarat

Type: Pressurized heavy water reactor (PHWR)

6. Kalpakkam- Tamil Nadu

Type: Pressurized heavy water reactor (PHWR)

7. Narora-Uttar Pradesh

Type: Pressurized heavy water reactor (PHWR)

Source: PIB, Wikipedia