Saeul nuclear power plant
Saeul nuclear power plant is a nuclear power station in South Korea with 2 operating units totalling 2,979 MW gross. The site has 4 units on record in total.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Unit 1 | PWR | APR-1400 | 1,488 | 2016 | |
| Unit 2 | PWR | APR-1400 | 1,491 | 2019 | |
| Unit 3 | Under construction | PWR | APR-1400 | 1,400 | 2026 |
| Unit 4 | Under construction | PWR | APR-1400 | 1,400 | 2026 |
Unit by unit
Each unit's rating, type and milestone dates as recorded by the Global Nuclear Power Tracker, with any correction we made to it. A dash or "not disclosed" means the source does not give the value.
Saeul nuclear power plant 1
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | APR-1400 |
| Size class | Large |
| Gross capacity | 1,488MW |
| Net capacity | 1,416MW |
| Thermal output | 3,983MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Korea Hydro & Nuclear Power |
| Owner | Korea Hydro & Nuclear Power Co100% |
| Operator | Korea Hydro & Nuclear Power |
| Construction start | 16 Oct 2008 |
|---|---|
| First criticality | 29 Dec 2015 |
| Grid connection | 15 Jan 2016 |
| Commercial operation | 20 Dec 2016 |
Saeul nuclear power plant 2
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | APR-1400 |
| Size class | Large |
| Gross capacity | 1,491MW |
| Net capacity | 1,418MW |
| Thermal output | 3,983MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Korea Hydro & Nuclear Power |
| Owner | Korea Hydro & Nuclear Power Co100% |
| Operator | Korea Hydro & Nuclear Power |
| Construction start | 19 Aug 2009 |
|---|---|
| First criticality | 8 Apr 2019 |
| Grid connection | 22 Apr 2019 |
| Commercial operation | 29 Aug 2019 |
Saeul nuclear power plant 3 Under construction
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | APR-1400 |
| Size class | Large |
| Gross capacity | 1,400MW |
| Net capacity | 1,340MW |
| Thermal output | 3,983MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Korea Hydro & Nuclear Power |
| Owner | Korea Hydro & Nuclear Power Co100% |
| Operator | Korea Hydro & Nuclear Power |
| Construction start | 1 Apr 2017 |
|---|---|
| Commercial operation | 1 Jan 2026 |
Saeul nuclear power plant 4 Under construction
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | APR-1400 |
| Size class | Large |
| Gross capacity | 1,400MW |
| Net capacity | 1,340MW |
| Thermal output | 3,983MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Korea Hydro & Nuclear Power |
| Owner | Korea Hydro & Nuclear Power Co100% |
| Operator | Korea Hydro & Nuclear Power |
| Construction start | 20 Sep 2018 |
|---|---|
| Commercial operation | 1 Jan 2026 |
Saeul nuclear power plant in context
By gross operating capacity Saeul nuclear power plant is the 3rd largest of 8 operating nuclear sites in South Korea, holding 11% of the country's operating capacity, and ranks 42nd of 172 worldwide.
Its operating units started up between 2016 and 2019; the median unit is 8.5 years old, younger than the median of 27.0 in South Korea.
The 2 units with both construction and grid dates on record took 7.2 to 9.7 years (median 8.5) from construction start to grid connection; the median across all reactors connected in the 2010s is 5.9 years.
The nearest other tracked nuclear sites are Shin-Kori nuclear power plant (0 km), Kori nuclear power plant (1 km) and Wolsong nuclear power plant (45 km).
2 operating units are rated differently now from their design net capacities: Unit 1 +5.7% and Unit 2 +5.8%.
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Unit 1 | 2008 | 2016 | 7.2 | 5.9 (2010s) |
| Unit 2 | 2009 | 2019 | 9.7 | 5.9 (2010s) |
Nearest tracked nuclear sites
| Site | Country | Distance | Operating GW gross |
|---|---|---|---|
| Shin-Kori nuclear power plant | South Korea | 0 km | 2.1 |
| Kori nuclear power plant | South Korea | 1 km | 2.8 |
| Wolsong nuclear power plant | South Korea | 45 km | 1.8 |
How these are worked out: ranks use gross operating capacity; ages count from the start-up year on record, as on the age page; build times run from construction start to grid connection, as on the build-times page; ratings are the tracker's net and design net capacity, as on the uprates page. Distances are straight-line between exact positions, so a site with only an approximate position gets none. A unit missing a date or a rating is left out of the figure that needs it.
Earthquakes nearby
Loading the latest USGS check…
| Time (UTC) | Mag | Depth | Epicentre | Distance |
|---|
Magnitude 4.0 and above within 200 km of Saeul nuclear power plant's listed coordinates, past 30 days. This is distance, not shaking: it says nothing about damage or any change in operation. Every plant.
| Location | Ulsan, Busan, South Korea |
|---|---|
| Coordinates | 35.3271, 129.3017 |
| Elevation | about 5 mabove sea level |
| Setting | On the sea coast, 0.3 km from the water |
| Region | Eastern Asia |
| Units by status | Operating: 2 Under construction: 2 |
Elevation is read at the listed coordinates from a 30 m terrain model (SRTM 30 m). Two independent models differ by a median of 6 m across our plants and by up to about 40 m on steep or coastal ground, and a point on a shoreline can read as sea level. Distance to the water is measured to a generalised 1:10 million coastline, so a few kilometres or less is not resolved. This is context, not a design-basis or flood-risk figure.
| Owners | Korea Hydro & Nuclear Power Co |
|---|---|
| Operators | Korea Hydro & Nuclear Power |
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Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data