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Watts Bar nuclear power plant

Watts Bar nuclear power plant is a nuclear power station in United States with 2 operating units totalling 2,428 MW gross. The site has 2 units on record in total.

Operating4Under construction1Pre-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
2
Operating
2
Operating capacity
2,428MW

Units

UnitStatusTypeModelGross MWOnline
Unit 1 Operating PWR WH 4LP (ICECND) 1,210 1996
Unit 2 Operating PWR WH 4LP (ICECND) 1,218 2016

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.

Watts Bar nuclear power plant 1 Operating

Reactor typePressurised water reactor (PWR)
ModelWestinghouse 4-loop
Size classLarge
Gross capacity1,210MW
Net capacity1,157MW
Thermal output3,459MWt
Enrichment3–5% U-235
NSSS vendorWestinghouse Electric Company
OwnerTennessee Valley Authority100%
OperatorTennessee Valley Authority
Construction start20 Jul 1973
First criticality1 Jan 1996
Grid connection6 Feb 1996
Commercial operation27 May 1996

Live status, outage record and fuel chain for Watts Bar nuclear power plant 1

Watts Bar nuclear power plant 2 Operating

Reactor typePressurised water reactor (PWR)
ModelWestinghouse 4-loop
Size classLarge
Gross capacity1,218MW
Net capacity1,164MW
Thermal output3,411MWt
Enrichment3–5% U-235
NSSS vendorWestinghouse Electric Company
OwnerTennessee Valley Authority100%
OperatorTennessee Valley Authority
Construction start1 Sep 1973
First criticality23 May 2016
Grid connection3 Jun 2016
Commercial operation19 Oct 2016

Live status, outage record and fuel chain for Watts Bar nuclear power plant 2

Watts Bar nuclear power plant in context

By gross operating capacity Watts Bar nuclear power plant is the 13th largest of 54 operating nuclear sites in the United States, holding 2% of the country's operating capacity, and ranks 63rd of 172 worldwide.

Its operating units started up between 1996 and 2016; the median unit is 20.0 years old, younger than the median of 45.0 in the United States.

The 2 units with both construction and grid dates on record took 22.5 to 42.8 years (median 32.7) 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 Sequoyah nuclear power plant (50 km), Oconee nuclear power plant (194 km) and Browns Ferry nuclear power plant (234 km).

2 operating units are rated differently now from their design net capacities: Unit 1 -5.0% and Unit 2 -0.1%.

Build time by unit

UnitConstruction startGrid connectionYearsFleet median, same decade
Unit 11973199622.58.0 (1990s)
Unit 21973201642.85.9 (2010s)

Nearest tracked nuclear sites

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
LocationTennessee, United States
Coordinates35.6021, -84.7895
Elevationabout 235 mabove sea level
SettingAbout 490 km from the sea
RegionNorthern America
Units by status
Operating: 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
Tennessee Valley Authority
Operators
Tennessee Valley Authority

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Sources

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