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Ohi nuclear power plant 1

Retired Japan
Gross capacity
1,175MW

Ohi nuclear power plant 1 is a pressurised water reactor unit at Ohi nuclear power plant in Japan rated at 1,175 MW gross. It is retired. Commercial operation began 27 Mar 1979.

Specification
Reactor type Pressurised water reactor (PWR)
ModelWH 4LP
Size classLarge
CoolantLight water
ModeratorLight water
Gross capacity1,175MW
Net capacity (reference)1,120MW
Net capacity (design)1,120MW
Thermal output3,423MWt
Typical enrichment3–5% U-235
Ownership & location
SiteOhi nuclear power plant
Unit1
CountryJapan
OwnerKansai Electric Power Co100%
OperatorKansai Electric Power
Coordinates 35.5424, 135.6544
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Fabricator capability is recorded against reactor type and model line, not against named units — utilities do not publish fuel contracts.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. 26 Oct 1972Construction start
  2. 2 Dec 1977First criticality
  3. 23 Dec 1977Grid connection
  4. 27 Mar 1979Commercial operation
  5. 1 Mar 2018Permanent shutdown

Other units at Ohi nuclear power plant

UnitStatusGross MW
Ohi nuclear power plant 2 Retired 1,175
Ohi nuclear power plant 3 Operating 1,180
Ohi nuclear power plant 4 Operating 1,180

Other WH 4LP units

5 units worldwide share this model designation.

UnitCountryStatusGross MW
Enrico Fermi nuclear power plant Italy Retired 270
Ohi nuclear power plant 2 Japan Retired 1,175
Zion nuclear power plant 1 United States Retired 1,085
Zion nuclear power plant 2 United States Retired 1,085

Sources