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

Fugen nuclear power plant

Retired Japan Small
Gross capacity
165MW

Fugen nuclear power plant is a pressurised heavy water reactor unit at Fugen nuclear power plant in Japan rated at 165 MW gross. It is retired. Commercial operation began 20 Mar 1979.

Specification
Reactor type Pressurised heavy water reactor (PHWR)
ModelATR
SizeSmall300 MWe or less
CoolantHeavy water
ModeratorHeavy water
Gross capacity165MW
Net capacity (reference)148MW
Net capacity (design)148MW
Thermal output557MWt
NSSS vendornot on record
Typical enrichmentNatural uranium, 0.71% U-235
Ownership & location
SiteFugen nuclear power plant
Unitnot stated
CountryJapan
OwnerJapan Atomic Energy Agency100%
OperatorJapan Atomic Energy Agency
Coordinates 35.7544, 136.0191
Fuel chain for this unit
Fuel form
Natural uranium dioxide bundles
Enrichment
Natural uranium, 0.71% U-235 no enrichment required
Who makes this assembly
Upstream

This unit runs on natural uranium, so its fuel chain has no enrichment step at all: mine → mill → conversion → fabrication. That is the shortest fuel chain of any commercial reactor type, and it makes the operator independent of the four organisations that control enrichment worldwide.

Conversion
AEOICamecoCNNCCNNCCNNCConverDynOranoRosatomTVELWestinghouse
Fabricator capability is recorded against reactor type and model line, not against named units, utilities do not publish fuel contracts.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. 10 May 1972Construction start
  2. 20 Mar 1978First criticality
  3. 29 Jul 1978Grid connection
  4. 20 Mar 1979Commercial operation
  5. 29 Mar 2003Permanent shutdown

Sources

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