South Korea · 35.711, 129.474Wolsong
Wolsong, nuclear power plant in South Korea, operates 3 pressurized heavy water reactors with 1,735 MW net installed capacity and has been in service since 1983.
It is the only plant in South Korea running PHWR technology. Unit Wolsong 2 has been operating for 29 years, since 1997. Its 1,735 MW net are enough to supply about 5,470,000 households.
- Country
- South Korea
- Units
- 4
- Technology
- PHWR
- Net capacity
- 1,735 MWe
- First grid connection
- 1983
- Operator
- Korea Hydro & Nuclear Power
- Owner
- Korea Hydro & Nuclear Power Co
- Status
- Operating
See also: alerts for this plant · every plant in South Korea · Vendor: Atomic Energy of Canada Limited · every PHWR reactor · how a PHWR works
Units
| Unit | Type | Model | Status | MWe | MWt | Construction start | Grid connection | Closure | Licence until | Load factor |
|---|---|---|---|---|---|---|---|---|---|---|
| Wolsong 1 | Pressurized heavy water (PHWR · CANDU) | CANDU 6 | Shut down | 661 | 2,061 | Oct 1977 | Dec 1982 | Dec 2019 | — | — |
| Wolsong 2 | Pressurized heavy water (PHWR · CANDU) | CANDU 6 | Operating | 571 | 2,061 | Sep 25, 1992 | Apr 1, 1997 | — | Nov 1, 2026 | 82.5 % (2024) |
| Wolsong 3 | Pressurized heavy water (PHWR · CANDU) | CANDU 6 | Operating | 595 | 2,061 | Mar 17, 1994 | Mar 25, 1998 | — | Dec 29, 2027 | 41.6 % (2024) |
| Wolsong 4 | Pressurized heavy water (PHWR · CANDU) | CANDU 6 | Operating | 569 | 2,061 | Jul 22, 1994 | May 21, 1999 | — | Feb 7, 2029 | 58.6 % (2024) |
Data: IAEA PRIS · Wikipedia · updated on Sep 17, 2026
Wolsong 1, a 661 MWe PHWR (CANDU 6), started construction in 1977 and operated from 1982 to 2019.
Wolsong 2, a 571 MWe PHWR (CANDU 6), started construction in 1992, was connected to the grid in 1997 and is still operating, with a 82.5% load factor in 2024.
Wolsong 3, a 595 MWe PHWR (CANDU 6), started construction in 1994, was connected to the grid in 1998 and is still operating, with a 41.6% load factor in 2024.
Wolsong 4, a 569 MWe PHWR (CANDU 6), started construction in 1994, was connected to the grid in 1999 and is still operating, with a 58.6% load factor in 2024.
Operator: Korea Hydro & Nuclear Power.
Owner: Korea Hydro & Nuclear Power Co (Wolsong 1, Wolsong 2, Wolsong 3, Wolsong 4).