Kori Nuclear Power Plant
|Kori Nuclear Power Plant|
Kori Nuclear Power Plant, Reactors Kori 1, Kori 2, Kori 3, Kori 4 from right to left.
|Construction began||Unit 1: August 1, 1972|
Unit 2: December 23, 1977
Unit 3: October 1, 1979
Unit 4: April 1, 1980
Unit 5: June 16, 2006
Unit 6: June 5, 2007
Unit 7: October 16, 2008
Unit 8: August 19, 2009
|Commission date||Unit 1: April 29, 1978|
Unit 2: July 25, 1983
Unit 3: September 30, 1985
Unit 4: April 29, 1986
Unit 5: February 28, 2011
Unit 6: July 20, 2012
Unit 7: December 20, 2016
|Decommission date||Unit 1: June 18, 2017|
|Owner(s)||Korea Hydro & Nuclear Power|
|Operator(s)||Korea Hydro & Nuclear Power|
|Nuclear power station|
|Cooling source||Sea of Japan|
(East sea of Korea)
|Thermal capacity||1 × 1882 MWth|
2 × 2912 MWth
2 × 2825 MWth
1 × 3983 MWth
|Units operational||1 × 640 MW|
1 × 1011 MW
1 × 1012 MW
2 × 997 MW
1 × 1383 MW
|Make and model||3 × WH-F|
2 × OPR-1000
1 × APR-1400
|Units under const.||1 × 1340 MW APR-1400|
|Units planned||2 × 1340 MW APR-1400|
|Units decommissioned||1 × 576 MW WH-60|
|Nameplate capacity||6040 MW|
(includes Units 1 & 7)
|Annual net output||43,148 GW·h (2016)|
(includes Units 1 & 7)
|Commons||Related media on Commons|
The Kori Nuclear Power Plant (Korean: 고리원자력발전소, Hanja: 古里原子力發電所) is a South Korean nuclear power plant located in Kori, a suburban village in Busan. It is owned and operated by Korea Hydro & Nuclear Power, a subsidiary of KEPCO. The first reactor began commercial operation in 1978.
An expansion of the plant begun in 2006 added four new Korean-sourced reactors, the so-called Shin Kori reactors. The first pair of Shin Kori reactors are of the OPR-1000 design, while the second two are the APR-1400 design. By November 2010 the first was online and the rest undergoing trials or construction. As of December 2016[update] approval of operation of reactor 4 is expected in the first half of 2017. Two further APR-1400 reactors, known as Shin Kori-5 and Shin Kori-6 have started construction in April 2017 and September 2018, respectively.
|Design||First criticality||Commercial start||NSSS||Turbine generator||A-E||Construction|
|Kori-1||576 MW||WH-60||06/1977||04/1978||Westinghouse||GEC Turbines (Rugby)||Gilbert||Westinghouse|
|Kori-2||640 MW||WH-F||04/1983||07/1983||Westinghouse||GEC Turbines (Rugby)||Gilbert||Westinghouse|
|Kori-3||1011 MW||WH-F||01/1985||09/1985||Westinghouse||GEC Turbines (Rugby)||Bechtel||Hyundai|
|Kori-4||1012 MW||WH-F||10/1985||04/1986||Westinghouse||GEC Turbines (Rugby)||Bechtel||Hyundai|
|Shin Kori-1||997 MW||OPR-1000||06/2010||02/2011||KHNP/KEPCO||Doosan||KOPEC||Hyundai|
|Shin Kori-2||997 MW||OPR-1000||12/2011||07/2012||KHNP/KEPCO||Doosan||KOPEC||Hyundai|
|Shin Kori-3||1383 MW||APR-1400||12/2015||12/2016||KHNP/KEPCO||Doosan||KOPEC||Hyundai|
|Shin Kori-4||1340 MW||APR-1400||2018/09 (expected)||KHNP/KEPCO||Doosan||KOPEC||Hyundai|
|Shin Kori-5||1340 MW||APR-1400||Unknown||Unknown||Unknown||Unknown||Unknown|
|Shin Kori-6||1340 MW||APR-1400||Unknown||Unknown||Unknown||Unknown||Unknown|
On February 9, 2012, during a refueling outage, loss of off-site power (LOOP) occurred and emergency diesel generator (EDG) 'B' failed to start while EDG 'A' was out of service for scheduled maintenance, resulting in a station blackout (SBO). Off-site power was restored 12 minutes after the SBO condition began.
The LOOP was caused by a human error during a protective relay test of the main generator. The EDG 'B' failing to start was caused by the failure of the EDG air start system. Further investigation revealed that the utility did not exercise proper control of electrical distribution configuration to ensure the availability of the Station Auxiliary Transformer (SAT) while conducting test on the Unit Auxiliary Transformer (UAT).
After restoring off-site power through the SAT, the operators eventually recovered shutdown cooling by restoring power to a residual heat removal pump. During the loss of shutdown cooling for 19 minutes, the reactor coolant maximum temperature in the hot leg increased from 37℃ to 58.3℃ (approximately 21.3℃ rise), and the spent fuel pool temperature slightly increased from 21℃ to 21.5℃. There was no adverse effect on the plant safety as a result of this event, no radiation exposure to the workers, and no release of radioactive materials to the environment. However, inconsistent with the requirements, the licensee did not report the SBO event to the regulatory body in a timely manner and did not declare the "alert" status of the event in accordance with the plant emergency plan. The licensee reported this event to the regulatory body about a month after the event had occurred.
On 2 October 2012 at 8:10 a.m., Shingori 1 was shut down after a warning signal indicated a malfunction in the control rod system. An investigation is currently underway to verify the exact cause of the problem.
In June 2013, Kori-2 was shutdown, and Kori-1 ordered to remain offline, until safety-related control cabling with forged safety certificates is replaced. Control cabling installed in the APR-1400s under construction failed flame and other tests, so need to be replaced delaying construction by up to a year.
In October 2013, cable installed in Shin Kori-3 failed safety tests, including flame tests. Replacement with U.S. manufactured cable has delayed the startup of the plant, which eventually entered commercial operation 3 years late.
- "First Korean APR-1400 enters commercial operation". World Nuclear News. 20 December 2016. Retrieved 23 December 2016.
- "Commissioning of second Korean APR1400 postponed". World Nuclear News. 10 August 2017. Retrieved 12 August 2017.
- "Korea to decommission its oldest reactor". Nuclear Engineering International. 12 June 2017. Retrieved 21 July 2017.
- "Loss of shutdown cooling due to station blackout during refueling outage". IAEA. 23 April 2012. Retrieved 6 November 2012.
- Yonhap News (2 October 2012) Nuclear reactor halts operation due to malfunction
- "New component issues idle Korean reactors". World Nuclear News. 28 May 2013. Retrieved 7 June 2013.
- "Recabling delays Shin Kori start ups". World Nuclear News. 18 October 2013. Retrieved 15 November 2013.
- "Shin-Kori 3 receives replacement cables". Nuclear Engineering International. 30 September 2014. Retrieved 10 March 2015.
- Lee, Maggie (2016-12-10). "Film Review: 'Pandora'". Variety. Retrieved 2019-01-23.
- "With Kori-1 shutdown, Pres. Moon signals major turn away from nuclear energy". Hankyoreh. June 20, 2017. Retrieved 2019-01-23.
- Park, Jin-hai (2016-12-04). "Disaster movie 'Pandora' rings true more than ever". Korea Times. Retrieved 2019-01-23.