Kori Nuclear Power Plant

Kori Nuclear Power Plant is the largest operational nuclear power plant in the world in terms of the number of reactors operated. It won this first place after surpassing Canada’s Bruce Power Plant. The Kashiwazaki-Kariwa power plant has a higher rated capacity, but is not currently operating due to earthquake security modifications.

The first of the local reactors started its operation in 1978 and remained in operation until 2017. Three more reactors started operating two years later, in 2018.

All reactors operating in this complex are pressurized water reactors. In the first phase, all four reactors were supplied by the American company Westinghouse, in the second phase they were KEPCO reactors.

technical parameters Kori Nuclear Power Plant

Location	Gori, Busan, South Korea
Owner	Korea Hydro & Nuclear Power
Operator	Korea Hydro & Nuclear Power
Construction began	Unit 1: 1 August 1972 Unit 2: 23 December 1977 Unit 3: 1 October 1979 Unit 4: 1 April 1980 Unit 5: 16 June 2006 Unit 6: 5 June 2007 Unit 7: 16 October 2008 Unit 8: 19 August 2009
Commission date	Unit 1: 29 April 1978 Unit 2: 25 July 1983 Unit 3: 30 September 1985 Unit 4: 29 April 1986 Unit 5: 28 February 2011 Unit 6: 20 July 2012 Unit 7: 20 December 2016 Unit 8: 29 August 2019
Decommission date	Unit 1: 18 June 2017
Reactor supplier	Westinghouse KEPCO E&C
Reactor type	Pressurized water reactor
Make and model	3 ×WH-F 2 × OPR-1000 2 × APR-1400
Thermal capacity	1 × 1882 MWth 2 × 2912 MW_th 2 × 2825 MW_th 2 × 3983 MW_th
Units operational	1 × 640 MW 1 × 1011 MW 1 × 1012 MW 2 × 996 MW 1 × 1416 MW 1 × 1418 MW
Cooling source	Sea of Japan
Units decommissioned	1 × 576 MW WH-60
Units under const.	2 × 1340 MW APR-1400
Capacity factor	74.45% (Units 1 & 7)
Annual net output	43,148 GW·h (2016) (Units 1 & 7)
Nameplate capacity	7489 MW (netto)

Kori Nuclear Power Plant

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Kori Nuclear Power Plant