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Reference data
Page built2026-10-22
Data as ofAugust 2026

Nuclear power in the United Kingdom

nuclearchain.net/countries/united-kingdom/ · data: Global Energy Monitor (GNPT, August 2026), CC BY 4.0 · printed from the live page

United Kingdom operates 9 nuclear power reactors across 28 sites, with 6.5 GW of gross capacity. A further 2 units are under construction, adding 3.4 GW. 36 units have been retired.

Operating
9
6.5 GW gross
Under construction
2
3.4 GW
Planned
20
incl. 15 announced
Retired
36
27 cancelled
GERMANYUNITED KINGDOMHinkley Point nuclear power plant: 6 units, 5,284 MWSizewell nuclear power plant: 5 units, 4,940 MWMoorside Clean Energy Hub nuclear power plant: 2 units, 3,200 MWHeysham nuclear power plant: 4 units, 2,610 MWDungeness nuclear power plant: 4 units, 1,690 MWHunterston nuclear power plant: 4 units, 1,634 MWWylfa Rolls Royce SMR nuclear power plant: 3 units, 1,410 MW, position approximateTorness nuclear power plant: 2 units, 1,364 MWHartlepool nuclear power plant: 2 units, 1,310 MWWylfa nuclear power plant: 2 units, 1,070 MWTrawsfynydd nuclear power plant: 2 units, 470 MWOldbury nuclear power plant: 2 units, 460 MWBerkeley nuclear power plant: 2 units, 332 MWBradwell nuclear power plant: 2 units, 292 MWDounreay nuclear power plant: 2 units, 265 MWChapelcross nuclear power plant: 4 units, 240 MWCalder Hall nuclear power plant: 4 units, 240 MWWinfrith SGHWR nuclear power plant: 1 unit, 100 MWWindscale AGR nuclear power plant: 1 unit, 36 MW250 km
Operating4Under construction1Pre-construction1Shelved1Retired12circle 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.

Operating fleet by type: GCR (8), PWR (1). Principal operator: EDF Energy.

Operating capacity over time

First reactor online1956
Peak14.1 GW in 1995
Now6.5 GW 9 units
2026 so farno change
0510151960197019801990200020102020GW
Gross capacity of units that had started up and not been permanently shut down by 31 December each year (2026 is to date). Amber marks the peak, green the present.
Data table
YearUnits onlineGW grossChange, GW
195610.06+0.06
195720.12+0.06
195830.18+0.06
195970.42+0.24
196080.48+0.06
1962131.12+0.64
1963141.16+0.04
1964161.50+0.35
1965222.97+1.46
1966243.46+0.49
1967253.69+0.23
1968274.02+0.33
1971284.55+0.53
1972295.09+0.54
1976326.63+1.55
1977327.26+0.63
1978337.92+0.66
1981327.88−0.04
1985338.50+0.62
1988339.01+0.52
19893913.89+4.88
19903713.62−0.27
19913513.15−0.47
19943412.90−0.25
19953514.15+1.25
20003313.61−0.53
20023113.32−0.29
20032713.08−0.24
20042312.84−0.24
20061911.89−0.95
20111811.66−0.23
20121610.89−0.77
20151510.36−0.53
2021128.49−1.87
202296.53−1.95

Only years in which capacity changed are listed.

Position in the fuel chain

FacilityStageOperatorCapacity / output
Springfields conversion line conversion Westinghouse Electric Company not disclosed
Urenco ChemPlants, Capenhurst deconversion Urenco 10,000tU/yr
Urenco Capenhurst enrichment Urenco 4,500tSWU/yr
Springfields fabrication Westinghouse Electric Company 600tHM/yr
Sellafield MOX Plant fabrication Nuclear Decommissioning Authority 120tHM/yr
Urenco Capenhurst HALEU line haleu Urenco not disclosed
Low Level Waste Repository, Drigg repository Nuclear Waste Services not disclosed
Sellafield (Magnox reprocessing) reprocessing Nuclear Decommissioning Authority 1,500tHM/yr

All units in United Kingdom

UnitSiteStatusTypeGross MWOnline
Hartlepool nuclear power plant A1 Hartlepool nuclear power plant Operating GCR 655 1989
Hartlepool nuclear power plant A2 Hartlepool nuclear power plant Operating GCR 655 1989
Heysham nuclear power plant A1 Heysham nuclear power plant Operating GCR 625 1989
Heysham nuclear power plant A2 Heysham nuclear power plant Operating GCR 625 1989
Heysham nuclear power plant B1 Heysham nuclear power plant Operating GCR 680 1989
Heysham nuclear power plant B2 Heysham nuclear power plant Operating GCR 680 1989
Sizewell nuclear power plant B Sizewell nuclear power plant Operating PWR 1,250 1995
Torness nuclear power plant 1 Torness nuclear power plant Operating GCR 682 1988
Torness nuclear power plant 2 Torness nuclear power plant Operating GCR 682 1989
Hinkley Point nuclear power plant C1 Hinkley Point nuclear power plant Under construction PWR 1,720 2030
Hinkley Point nuclear power plant C2 Hinkley Point nuclear power plant Under construction PWR 1,720 2031
Sizewell nuclear power plant C1 Sizewell nuclear power plant Pre-construction PWR 1,600 -
Sizewell nuclear power plant C2 Sizewell nuclear power plant Pre-construction PWR 1,600 -
Wylfa Rolls Royce SMR nuclear power plant 1 Wylfa Rolls Royce SMR nuclear power plant Pre-construction - 470 2035
Wylfa Rolls Royce SMR nuclear power plant 2 Wylfa Rolls Royce SMR nuclear power plant Pre-construction - 470 -
Wylfa Rolls Royce SMR nuclear power plant 3 Wylfa Rolls Royce SMR nuclear power plant Pre-construction - 470 -
Cumbria nuclear power plant 1 Cumbria nuclear power plant Announced PHWR 470 -
Cumbria nuclear power plant 2 Cumbria nuclear power plant Announced PHWR 470 -
Llynfi nuclear power plant 1 Llynfi nuclear power plant Announced PWR 20 -
Llynfi nuclear power plant 2 Llynfi nuclear power plant Announced PWR 20 -
Llynfi nuclear power plant 3 Llynfi nuclear power plant Announced PWR 20 -
Llynfi nuclear power plant 4 Llynfi nuclear power plant Announced PWR 20 -
North Teeside nuclear power plant 1 North Teeside nuclear power plant Announced - 300 2030
North Teeside nuclear power plant 2 North Teeside nuclear power plant Announced - 300 2030
North Teeside nuclear power plant 3 North Teeside nuclear power plant Announced - 300 2030
North Teeside nuclear power plant 4 North Teeside nuclear power plant Announced - 300 2030
Wylfa Rolls Royce SMR nuclear power plant 4 Wylfa Rolls Royce SMR nuclear power plant Announced - 470 -
Wylfa Rolls Royce SMR nuclear power plant 5 Wylfa Rolls Royce SMR nuclear power plant Announced - 470 -
Wylfa Rolls Royce SMR nuclear power plant 6 Wylfa Rolls Royce SMR nuclear power plant Announced - 470 -
Wylfa Rolls Royce SMR nuclear power plant 7 Wylfa Rolls Royce SMR nuclear power plant Announced - 470 -
Wylfa Rolls Royce SMR nuclear power plant 8 Wylfa Rolls Royce SMR nuclear power plant Announced - 470 -
Berkeley nuclear power plant 1 Berkeley nuclear power plant Retired GCR 166 1962
Berkeley nuclear power plant 2 Berkeley nuclear power plant Retired GCR 166 1962
Bradwell B nuclear power plant 1 Bradwell B nuclear power plant Cancelled PWR 1,150 -
Bradwell B nuclear power plant 2 Bradwell B nuclear power plant Cancelled PWR 1,150 -
Bradwell nuclear power plant 1 Bradwell nuclear power plant Retired GCR 146 1962
Bradwell nuclear power plant 2 Bradwell nuclear power plant Retired GCR 146 1962
Calder Hall nuclear power plant 1 Calder Hall nuclear power plant Retired GCR 60 1956
Calder Hall nuclear power plant 2 Calder Hall nuclear power plant Retired GCR 60 1957
Calder Hall nuclear power plant 3 Calder Hall nuclear power plant Retired GCR 60 1958
Calder Hall nuclear power plant 4 Calder Hall nuclear power plant Retired GCR 60 1959
Chapelcross nuclear power plant 1 Chapelcross nuclear power plant Retired GCR 60 1959
Chapelcross nuclear power plant 2 Chapelcross nuclear power plant Retired GCR 60 1959
Chapelcross nuclear power plant 3 Chapelcross nuclear power plant Retired GCR 60 1959
Chapelcross nuclear power plant 4 Chapelcross nuclear power plant Retired GCR 60 1960
Dounreay nuclear power plant DFR Dounreay nuclear power plant Retired FBR 15 1962
Dounreay nuclear power plant PFR Dounreay nuclear power plant Retired FBR 250 1976
Dungeness nuclear power plant A1 Dungeness nuclear power plant Retired GCR 230 1965
Dungeness nuclear power plant A2 Dungeness nuclear power plant Retired GCR 230 1965
Dungeness nuclear power plant B1 Dungeness nuclear power plant Retired GCR 615 1985
Dungeness nuclear power plant B2 Dungeness nuclear power plant Retired GCR 615 1989
Dungeness nuclear power plant C Dungeness nuclear power plant Cancelled - 1,650 -
Hinkley Point nuclear power plant A1 Hinkley Point nuclear power plant Retired GCR 267 1965
Hinkley Point nuclear power plant A2 Hinkley Point nuclear power plant Retired GCR 267 1965
Hinkley Point nuclear power plant B1 Hinkley Point nuclear power plant Retired GCR 655 1978
Hinkley Point nuclear power plant B2 Hinkley Point nuclear power plant Retired GCR 655 1976
Hunterston nuclear power plant A1 Hunterston nuclear power plant Retired GCR 173 1964
Hunterston nuclear power plant A2 Hunterston nuclear power plant Retired GCR 173 1964
Hunterston nuclear power plant B1 Hunterston nuclear power plant Retired GCR 644 1976
Hunterston nuclear power plant B2 Hunterston nuclear power plant Retired GCR 644 1977
Moorside Clean Energy Hub nuclear power plant 1 Moorside Clean Energy Hub nuclear power plant Shelved (inferred) PWR 1,600 -
Moorside Clean Energy Hub nuclear power plant 2 Moorside Clean Energy Hub nuclear power plant Shelved (inferred) PWR 1,600 -
Moorside nuclear power plant 1 Moorside nuclear power plant Cancelled PWR 1,135 -
Moorside nuclear power plant 2 Moorside nuclear power plant Cancelled PWR 1,135 -
Moorside nuclear power plant 3 Moorside nuclear power plant Cancelled PWR 1,135 -
Oldbury nuclear power plant A1 Oldbury nuclear power plant Retired GCR 230 1967
Oldbury nuclear power plant A2 Oldbury nuclear power plant Retired GCR 230 1968
Oldbury nuclear power plant B1 Oldbury nuclear power plant Cancelled PWR 1,100 -
Oldbury nuclear power plant B2 Oldbury nuclear power plant Cancelled PWR 1,100 -
Oldbury nuclear power plant B3 Oldbury nuclear power plant Cancelled PWR 1,100 -
Sellafield (Candu) nuclear power plant 1 Sellafield (Candu) nuclear power plant Cancelled PHWR 740 -
Sellafield (Candu) nuclear power plant 2 Sellafield (Candu) nuclear power plant Cancelled PHWR 740 -
Sellafield (Hitachi) nuclear power plant 1 Sellafield (Hitachi) nuclear power plant Cancelled FBR 311 -
Sellafield (Hitachi) nuclear power plant 2 Sellafield (Hitachi) nuclear power plant Cancelled FBR 311 -
Sizewell nuclear power plant A1 Sizewell nuclear power plant Retired GCR 245 1966
Sizewell nuclear power plant A2 Sizewell nuclear power plant Retired GCR 245 1966
Trawsfynydd nuclear power plant 1 Trawsfynydd nuclear power plant Retired GCR 235 1965
Trawsfynydd nuclear power plant 2 Trawsfynydd nuclear power plant Retired GCR 235 1965
Windscale AGR nuclear power plant Windscale AGR nuclear power plant Retired GCR 36 1963
Winfrith SGHWR nuclear power plant Winfrith SGHWR nuclear power plant Retired PHWR 100 1968
Wylfa Newydd nuclear power plant 1 Wylfa Newydd nuclear power plant Cancelled BWR 1,380 -
Wylfa Newydd nuclear power plant 2 Wylfa Newydd nuclear power plant Cancelled BWR 1,380 -
Wylfa NuScale SMR nuclear power plant 1 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 10 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 11 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 12 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 2 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 3 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 4 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 5 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 6 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 7 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 8 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa NuScale SMR nuclear power plant 9 Wylfa NuScale SMR nuclear power plant Cancelled (inferred) - 77 -
Wylfa nuclear power plant 1 Wylfa nuclear power plant Retired GCR 530 1971
Wylfa nuclear power plant 2 Wylfa nuclear power plant Retired GCR 540 1972

More on United Kingdom

Fuel supply exposure

The fuel families United Kingdom's operating reactors take, and the fabricators our sources document as able to make each. This is capability, not contracts: it does not say who actually supplies a given plant.

Fuel familyUnitsGW grossDocumented fabricatorsNote
AGR fuel85.3Westinghouse Electric CompanyOne documented supplier.
PWR (square-lattice) fuel11.3Westinghouse Electric Company, Framatome, KEPCO Nuclear Fuel, China National Nuclear Corporation, ENUSA Industrias Avanzadas, Mitsubishi Heavy Industries

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