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Olkiluoto nuclear power plant 1

Operating Finland
Gross capacity
920MW

Olkiluoto nuclear power plant 1 is a boiling water reactor unit at Olkiluoto nuclear power plant in Finland rated at 920 MW gross. It is operating. Commercial operation began 10 Oct 1979.

Specification
Reactor type Boiling water reactor (BWR)
ModelAA-III, BWR-2500
Size classLarge
CoolantLight water
ModeratorLight water
Gross capacity920MW
Net capacity (reference)890MW
Net capacity (design)660MW
Thermal output2,500MWt
Typical enrichment3–5% U-235
Ownership & location
SiteOlkiluoto nuclear power plant
Unit1
CountryFinland
OwnerTeollisuuden Voima Oyj100%
OperatorTeollisuuden Voima
Coordinates 61.2371, 21.4433
Fuel chain for this unit
Fuel form
Uranium dioxide pellets in zirconium-alloy cladding
Enrichment
3–5% U-235
Who makes this assembly
Upstream

Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.

RosatomUrencoCNNCOrano
Conversion
CamecoCNNCConverDynOranoRosatom
Fabricator capability is recorded against reactor type and model line, not against named units — utilities do not publish fuel contracts. See the fuel chain.

Timeline

  1. 1 Feb 1974Construction start
  2. 21 Jul 1978First criticality
  3. 2 Sep 1978Grid connection
  4. 10 Oct 1979Commercial operation

Other units at Olkiluoto nuclear power plant

UnitStatusGross MW
Olkiluoto nuclear power plant 2 Operating 920
Olkiluoto nuclear power plant 3 Operating 1,720
Olkiluoto nuclear power plant 4 Cancelled 1,830

Other AA-III, BWR-2500 units

4 units worldwide share this model designation.

UnitCountryStatusGross MW
Forsmark nuclear power plant 1 Sweden Operating 1,078
Forsmark nuclear power plant 2 Sweden Operating 1,160
Olkiluoto nuclear power plant 2 Finland Operating 920

Sources