Kozloduy nuclear power plant
Kozloduy nuclear power plant is a nuclear power station in Bulgaria with 2 operating units totalling 2,080 MW gross. The site has 8 units on record in total.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Unit 5 | PWR | VVER V-320 | 1,040 | 1988 | |
| Unit 6 | PWR | VVER V-320 | 1,040 | 1993 | |
| Unit 1 | Retired | PWR | VVER V-230 | 440 | 1974 |
| Unit 2 | Retired | PWR | VVER V-230 | 440 | 1975 |
| Unit 3 | Retired | PWR | VVER V-230 | 440 | 1981 |
| Unit 4 | Retired | PWR | VVER V-230 | 440 | 1982 |
| Unit 7 | Pre-construction | PWR | AP-1000 | 1,000 | 2035 |
| Unit 8 | Pre-construction | PWR | AP-1000 | 1,000 | 2037 |
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.
Kozloduy nuclear power plant 5
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-320 |
| Size class | Large |
| Gross capacity | 1,040MW |
| Net capacity | 1,003MW |
| Thermal output | 3,120MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | Bulgarian Energy Holding EAD100% |
| Construction start | 9 Jul 1980 |
|---|---|
| First criticality | 5 Nov 1987 |
| Grid connection | 29 Nov 1987 |
| Commercial operation | 23 Dec 1988 |
Kozloduy nuclear power plant 6
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-320 |
| Size class | Large |
| Gross capacity | 1,040MW |
| Net capacity | 1,003MW |
| Thermal output | 3,120MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | Bulgarian Energy Holding EAD100% |
| Construction start | 1 Apr 1982 |
|---|---|
| First criticality | 29 May 1991 |
| Grid connection | 2 Aug 1991 |
| Commercial operation | 30 Dec 1993 |
Kozloduy nuclear power plant 1 Retired
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-230 |
| Size class | Large |
| Gross capacity | 440MW |
| Net capacity | 408MW |
| Thermal output | 1,375MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | DP RAO (State Enterprise “Radio Active Waste”)100% |
| Construction start | 1 Apr 1970 |
|---|---|
| First criticality | 30 Jun 1974 |
| Grid connection | 24 Jul 1974 |
| Commercial operation | 28 Oct 1974 |
| Permanent shutdown | 31 Dec 2002 |
Kozloduy nuclear power plant 2 Retired
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-230 |
| Size class | Large |
| Gross capacity | 440MW |
| Net capacity | 408MW |
| Thermal output | 1,375MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | DP RAO (State Enterprise “Radio Active Waste”)100% |
| Construction start | 1 Apr 1970 |
|---|---|
| First criticality | 22 Aug 1975 |
| Grid connection | 24 Aug 1975 |
| Commercial operation | 10 Nov 1975 |
| Permanent shutdown | 31 Dec 2002 |
Kozloduy nuclear power plant 3 Retired
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-230 |
| Size class | Large |
| Gross capacity | 440MW |
| Net capacity | 408MW |
| Thermal output | 1,375MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | DP RAO (State Enterprise “Radio Active Waste”)100% |
| Construction start | 1 Oct 1973 |
|---|---|
| First criticality | 4 Dec 1980 |
| Grid connection | 17 Dec 1980 |
| Commercial operation | 20 Jan 1981 |
| Permanent shutdown | 31 Dec 2006 |
Kozloduy nuclear power plant 4 Retired
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | VVER V-230 |
| Size class | Large |
| Gross capacity | 440MW |
| Net capacity | 408MW |
| Thermal output | 1,375MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Rosatom |
| Owner | DP RAO (State Enterprise “Radio Active Waste”)100% |
| Construction start | 1 Oct 1973 |
|---|---|
| First criticality | 25 Apr 1982 |
| Grid connection | 17 May 1982 |
| Commercial operation | 20 Jun 1982 |
| Permanent shutdown | 31 Dec 2006 |
Kozloduy nuclear power plant 7 Pre-construction
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | AP-1000 |
| Size class | Large |
| Gross capacity | 1,000MW |
| Net capacity | not disclosed |
| Thermal output | not disclosed |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Westinghouse Electric Company |
| Owner | Bulgarian Energy Holding EAD100% |
| Commercial operation | 1 Jan 2035 |
|---|
Kozloduy nuclear power plant 8 Pre-construction
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | AP-1000 |
| Size class | Large |
| Gross capacity | 1,000MW |
| Net capacity | not disclosed |
| Thermal output | not disclosed |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Westinghouse Electric Company |
| Owner | Bulgarian Energy Holding EAD100% |
| Commercial operation | 1 Jan 2037 |
|---|
Kozloduy nuclear power plant in context
Kozloduy nuclear power plant is the only operating nuclear site in Bulgaria on record, so it holds all of the country's operating capacity, and ranks 84th of 172 operating sites worldwide by gross capacity.
Its operating units started up between 1988 and 1993; the median unit is 35.5 years old.
The 6 units with both construction and grid dates on record took 4.3 to 9.3 years (median 7.3) from construction start to grid connection; the median across all reactors connected in the 1980s is 7.3 years.
No other nuclear site with an exact position in this dataset lies within 300 km.
The current net rating of Unit 5 differs from its design net capacity by +5.2% (953 MW at design, 1,003 MW now).
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Unit 1 | 1970 | 1974 | 4.3 | 5.4 (1970s) |
| Unit 2 | 1970 | 1975 | 5.4 | 5.4 (1970s) |
| Unit 3 | 1973 | 1980 | 7.2 | 7.3 (1980s) |
| Unit 4 | 1973 | 1982 | 8.6 | 7.3 (1980s) |
| Unit 5 | 1980 | 1987 | 7.4 | 7.3 (1980s) |
| Unit 6 | 1982 | 1991 | 9.3 | 8.0 (1990s) |
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 Kozloduy 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 | Vratsa, Bulgaria |
|---|---|
| Coordinates | 43.7497, 23.7685 |
| Elevation | about 35 mabove sea level |
| Setting | About 320 km from the sea |
| Region | Eastern Europe |
| Units by status | Operating: 2 Retired: 4 Pre-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 | DP RAO (State Enterprise “Radio Active Waste”) Bulgarian Energy Holding EAD |
|---|---|
| Operators | not disclosed |
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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