Home / Asia / Japan / Japan Power Demonstration Reactor nuclear power plant

Japan Power Demonstration Reactor nuclear power plant

Retired nuclear power-station site in Ibaraki Prefecture, Japan. Approximate location 36.4568, 140.6059.

NuclearIbaraki PrefectureJapanBWR-1boiling water reactorRetired

Japan Power Demonstration Reactor nuclear power plant is a retired nuclear power station in Ibaraki Prefecture, Japan. Its current lifecycle status is “Retired” — so it is not yet, or no longer, generating at full output. It ranks #527 of 692 Japan power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 9.1% of Japan's electricity; the national grid averages 477 gCO₂/kWh (32.7% low-carbon) (2025).

13MW installed capacity
3construction time (1960→1963)
1965commissioned (~61 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_nuc_japandemonstrationre_japan.

Data status

Known data

FacilityJapan Power Demonstration Reactor nuclear power plant GEM-nuclear
CountryJapan · Ibaraki Prefecture GEM-nuclear
Coordinates36.4568, 140.6059 GEM-nuclear
FuelNuclear GEM-nuclear
MW installed capacity13 MW GEM Global Nuclear Power Tracker September 2025 unit-status sum (retired); retired/historical capacity
Verification noteSum of 1 GNPT unit records in the selected retired historical scope. source-verified
OwnerJapan Atomic Energy Agency [100%] GEM-nuclear
Commissioned1965 GEM-nuclear
Technologyboiling water reactor GEM-nuclear

Calculated from dataset

Capacity rank in country#527 / 692 calculated
Fuel-specific rank in country#24 / 24 calculated
Capacity vs country/fuel peers0.01× · 2,070 MW · n=24 calculated
Climate12.3°C · HDD 2,415 derived from coordinates
Environmental severityC4 · 42/100 derived from coordinates

Not available

GWh reported / yrNot available not in dataset
CO₂ emissionsnot applicable not applicable

Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.

Data provenance

Source of the capacity and fuel values:

capacity: GEM Global Nuclear Power Tracker September 2025 unit-status sum (retired); fuel: GEM GNPT

In context: how this plant compares

At 13 MW, Japan Power Demonstration Reactor nuclear power plant is below the median nuclear plant in Japan (2,070 MW). Technically it is described as boiling water reactor. Its lifecycle status is Retired; it no longer generates electricity. Nuclear plants split uranium to raise steam with no direct CO₂; they run as steady baseload with very high capacity factors and the longest operating lifetimes of any thermal plant.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

How it compares & nearby plants

The #24 largest nuclear power plant of 24 in Japan by capacity.

Japan has 24 nuclear power plants in this dataset, together about 58,491 MW of capacity.

Nearby power plants

Location

Coordinates 36.4568, 140.6059 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions

What type of power plant is Japan Power Demonstration Reactor nuclear power plant?

Japan Power Demonstration Reactor nuclear power plant was a nuclear-fired power station in Ibaraki Prefecture, Japan and was retired.

Built from open public data; no personal information. Operate this site? Request a correction or removal.