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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.

Operating1Pre-construction1circle area ∝ site capacitydashed = approximate position Coastlines, borders and lakes: Natural Earth (1:10 million, public domain), which is generalised, so a coastal plant can sit a couple of kilometres off its true shoreline. Site positions: Global Nuclear Power Tracker.
Units on record
8
Operating
2
Operating capacity
2,080MW
Country

Units

UnitStatusTypeModelGross MWOnline
Unit 5 Operating PWR VVER V-320 1,040 1988
Unit 6 Operating 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 Operating

Reactor typePressurised water reactor (PWR)
ModelVVER V-320
Size classLarge
Gross capacity1,040MW
Net capacity1,003MW
Thermal output3,120MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerBulgarian Energy Holding EAD100%
Construction start9 Jul 1980
First criticality5 Nov 1987
Grid connection29 Nov 1987
Commercial operation23 Dec 1988

Kozloduy nuclear power plant 6 Operating

Reactor typePressurised water reactor (PWR)
ModelVVER V-320
Size classLarge
Gross capacity1,040MW
Net capacity1,003MW
Thermal output3,120MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerBulgarian Energy Holding EAD100%
Construction start1 Apr 1982
First criticality29 May 1991
Grid connection2 Aug 1991
Commercial operation30 Dec 1993

Kozloduy nuclear power plant 1 Retired

Reactor typePressurised water reactor (PWR)
ModelVVER V-230
Size classLarge
Gross capacity440MW
Net capacity408MW
Thermal output1,375MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerDP RAO (State Enterprise “Radio Active Waste”)100%
Construction start1 Apr 1970
First criticality30 Jun 1974
Grid connection24 Jul 1974
Commercial operation28 Oct 1974
Permanent shutdown31 Dec 2002

Kozloduy nuclear power plant 2 Retired

Reactor typePressurised water reactor (PWR)
ModelVVER V-230
Size classLarge
Gross capacity440MW
Net capacity408MW
Thermal output1,375MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerDP RAO (State Enterprise “Radio Active Waste”)100%
Construction start1 Apr 1970
First criticality22 Aug 1975
Grid connection24 Aug 1975
Commercial operation10 Nov 1975
Permanent shutdown31 Dec 2002

Kozloduy nuclear power plant 3 Retired

Reactor typePressurised water reactor (PWR)
ModelVVER V-230
Size classLarge
Gross capacity440MW
Net capacity408MW
Thermal output1,375MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerDP RAO (State Enterprise “Radio Active Waste”)100%
Construction start1 Oct 1973
First criticality4 Dec 1980
Grid connection17 Dec 1980
Commercial operation20 Jan 1981
Permanent shutdown31 Dec 2006

Kozloduy nuclear power plant 4 Retired

Reactor typePressurised water reactor (PWR)
ModelVVER V-230
Size classLarge
Gross capacity440MW
Net capacity408MW
Thermal output1,375MWt
Enrichment3–5% U-235
NSSS vendorRosatom
OwnerDP RAO (State Enterprise “Radio Active Waste”)100%
Construction start1 Oct 1973
First criticality25 Apr 1982
Grid connection17 May 1982
Commercial operation20 Jun 1982
Permanent shutdown31 Dec 2006

Kozloduy nuclear power plant 7 Pre-construction

Reactor typePressurised water reactor (PWR)
ModelAP-1000
Size classLarge
Gross capacity1,000MW
Net capacitynot disclosed
Thermal outputnot disclosed
Enrichment3–5% U-235
NSSS vendorWestinghouse Electric Company
OwnerBulgarian Energy Holding EAD100%
Commercial operation1 Jan 2035

Kozloduy nuclear power plant 8 Pre-construction

Reactor typePressurised water reactor (PWR)
ModelAP-1000
Size classLarge
Gross capacity1,000MW
Net capacitynot disclosed
Thermal outputnot disclosed
Enrichment3–5% U-235
NSSS vendorWestinghouse Electric Company
OwnerBulgarian Energy Holding EAD100%
Commercial operation1 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

UnitConstruction startGrid connectionYearsFleet median, same decade
Unit 1197019744.35.4 (1970s)
Unit 2197019755.45.4 (1970s)
Unit 3197319807.27.3 (1980s)
Unit 4197319828.67.3 (1980s)
Unit 5198019877.47.3 (1980s)
Unit 6198219919.38.0 (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.

Site detail
LocationVratsa, Bulgaria
Coordinates43.7497, 23.7685
Elevationabout 35 mabove sea level
SettingAbout 320 km from the sea
RegionEastern 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 & operators
Owners
DP RAO (State Enterprise “Radio Active Waste”)
Bulgarian Energy Holding EAD
Operatorsnot disclosed

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Sources

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