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Mihama nuclear power plant 1

Retired Japan
Gross capacity
340MW

Mihama nuclear power plant 1 is a pressurised water reactor unit at Mihama nuclear power plant in Japan rated at 340 MW gross. It is retired. Commercial operation began 28 Nov 1970.

Specification
Reactor type Pressurised water reactor (PWR)
ModelWH 2LP
Size classLarge
CoolantLight water
ModeratorLight water
Gross capacity340MW
Net capacity (reference)320MW
Net capacity (design)320MW
Thermal output1,031MWt
Typical enrichment3–5% U-235
Ownership & location
SiteMihama nuclear power plant
Unit1
CountryJapan
OwnerKansai Electric Power Co100%
OperatorKansai Electric Power
Coordinates 35.7024, 135.9634
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Fabricator capability is recorded against reactor type and model line, not against named units — utilities do not publish fuel contracts.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 1967Construction start
  2. 29 Jul 1970First criticality
  3. 8 Aug 1970Grid connection
  4. 28 Nov 1970Commercial operation
  5. 27 Apr 2015Permanent shutdown

Other units at Mihama nuclear power plant

UnitStatusGross MW
Mihama nuclear power plant 2 Retired 500
Mihama nuclear power plant 3 Operating 826

Other WH 2LP units

7 units worldwide share this model designation.

UnitCountryStatusGross MW
Angra nuclear power plant 1 Brazil Operating 640
Beznau nuclear power plant 1 Switzerland Operating 380
Beznau nuclear power plant 2 Switzerland Operating 380
Krško nuclear power plant 1 Slovenia Operating 727
Doel nuclear power plant 1 Belgium Retired 454
Doel nuclear power plant 2 Belgium Retired 454

Sources