Kakrapar Atomic Power Station

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Kakrapar Atomic Power Station
Coordinates21°14′19″N 73°21′00″E / 21.23861°N 73.35000°E / 21.23861; 73.35000Coordinates: 21°14′19″N 73°21′00″E / 21.23861°N 73.35000°E / 21.23861; 73.35000
StatusKAPS-1 out of service for 3 years, 6 months
KAPS-2 operational
Construction began1984
Commission date6 May 1993
Operator(s)Nuclear Power Corporation of India
Nuclear power station
Reactor typePHWR
Power generation
Units operational2 × 220 MW
Units under const.2 × 700 MW
Nameplate capacity440 MW
Capacity factor96.5%
Annual net output3.72 TWh

Kakrapar Atomic Power Station is a nuclear power station in India, which lies in the proximity of the city of Vyara in the state of Gujarat. It consists of two 220 MW pressurised water reactor with heavy water as moderator (PHWR). KAPS-1 went critical on 3 September 1992 and began commercial electricity production a few months later on 6 May 1993. KAPS-2 went critical on 8 January 1995 and began commercial production on 1 September 1995. In January 2003, CANDU Owners Group (COG) declared KAPS as the best performing pressurised heavy water reactor.[1]

KAPS-2 was shut down after a coolant channel leak in July 2015 and a similar issue forced the shutdown of KAPS-1 in March 2016. After a replacement of coolant channels and feeder tubes, KAPS-2 attained criticality in September 2018. Maintenance on KAPS-1 was scheduled to be completed by March 2019.

The construction costs were originally estimated to be ₹382.52 crore; the plant was finally finished at a price of ₹1,335 crore. Construction of units 3 and 4 started in November 2010.[2]


  • 1998 KAPS-1 was switched off because of a leakage in the cooling loop for 66 days.
  • 10 March 2004 the (at the time of) supply for the control rods were irreparably damaged during maintenance work. In response, poisons were added to the system and the reactor was shut off.
  • On 22 August 2006 it was reported by village inhabitants the area around the power station had been penetrated. A search by the police did not result in any findings.
  • On 11 March 2016, KAPS-1 automatically shut down due to a leak of heavy coolant water, leaving both reactors non-operational.[3] [4] The leak was plugged ten days later.[5] Corrosion and cracks were found on the coolant channel and similar corrosion spots were found in KAPS-2 which had been non-operational since July 2015 after a coolant channel leak.[6][7] KAPS-2 attained criticality on 17 September 2018 after a replacement of its coolant channels and feeder tubes. A similar replacement in KAPS-1 was scheduled to be completed by March 2019.[8]


Unit Type Gross MW Construction start Operation start Notes
Phase I
Kakrapar 1 PHWR 220 1 December 1984 6 May 1993 [9]
Kakrapar 2 PHWR 220 1 April 1985 1 September 1995 [10]
Phase II
Kakrapar 3 PHWR 700 22 November 2010 2019/20 [11]
Kakrapar 4 PHWR 700 22 November 2010 2019/20[12] [2]

See also[edit]


  1. ^ Kurian, Vinson (26 March 2003). "Indian N-reactors set new global benchmark". The Hindu Business Line. Retrieved 16 February 2017.
  2. ^ a b "First concrete for Kakrapar 3 and 4". World Nuclear News. World Nuclear Association (WNA). 22 November 2010. Retrieved 22 November 2010.
  3. ^ Harikumar, S. (11 March 2016). "Shutdown of Unit-1 of KAPS Nuclear Power Plant following an incident leakage from Coolant System" (PDF). aerb.gov.in. Retrieved 16 February 2017.
  4. ^ "More than 100 hours later, Kakrapar nuclear leak not fixed". 16 March 2016. Retrieved 18 April 2016 – via Rediff.com.
  5. ^ "Kakrapar Nuclear Reactors to Get New Coolant Channels". News18. Indo-Asian News Service. 1 February 2017.
  6. ^ Fernandes, Snehal (19 March 2017). "A year after KAPS-1 heavy water leak, corrosion spots found: AERB". Hindustan Times.
  7. ^ Balan, Premal (11 March 2017). "Ahmedabad: No power from Kakrapar plant for at least a year". The Times of India.
  8. ^ Ray, Kalyan (18 September 2018). "Kakrapar nuclear plant gets a new lease of life". Deccan Herald.
  9. ^ "Nuclear Power Reactor Details - KAKRAPAR-1". Power Reactor Information System. International Atomic Energy Agency (IAEA). 23 November 2010. Retrieved 23 November 2010.
  10. ^ "Nuclear Power Reactor Details - KAKRAPAR-2". PRIS. (IAEA). 23 November 2010. Retrieved 23 November 2010.
  11. ^ http://loksabhaph.nic.in/Questions/QResult15.aspx?qref=4238&lsno=17
  12. ^ http://loksabhaph.nic.in/Questions/QResult15.aspx?qref=4238&lsno=17

External links[edit]