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South Korea
Under Construction
4
Operating
23
Long-Term Outage
3
Closed
2
Number of Reactors
(as of August 2026)
23.4
Mean Age of Reactor Fleet
(as of August 2026)
29.4%
Stable
Nuclear Share in Electricity Production
(2025)
1
2
WNISR
Essential News –
19 June 2017
South Korea Marks Nuclear Policy Turn by Shutting Down Oldest Reactor
South Korea Marks Nuclear Policy Turn by Shutting Down Oldest Reactor World Nuclear Industry Status Report (
WNISR
), 19 June 2017 The Kori-1 reactor in Gijang County north of the city of Busan was disconnected from the power grid on 18 June 2017, exactly forty years after it started generating electricity, on 19 June 1977. Operated by Korea Hydro & Nuclear Power (
KHNP
), which is a wholly owned subsidiary of Korea Electric Power Corporation (
KEPCO
), it becomes the first commercial (…)
WNISR
Essential News –
22 February 2012
South Korea: Two Grid Connections in January
22 February 2012. The International Atomic Energy Agency (
IAEA
) announced today that two new reactors were connected to the South-Korean electricity grid, Shin-Wolsong-1 on 27 January and Shin-Kori-2 on 28 January 2012, both 960
MW
Pressurized Water Reactor (
PWR
).
1
2