Japan Power Demonstration Reactor nuclear power plant
Japan Power Demonstration Reactor nuclear power plant is a nuclear site in Japan with 1 unit on record. None is currently operating.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Japan Power Demonstration Reactor nuclear power plant | Retired | BWR | BWR-1 | 13 | 1965 |
Unit by unit
Each unit's rating, type and milestone dates as recorded by the Global Nuclear Power Tracker, with any correction we made to it. A dash or "not disclosed" means the source does not give the value.
Japan Power Demonstration Reactor nuclear power plant Retired
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | BWR-1 |
| Size class | Very small |
| Gross capacity | 13MW |
| Net capacity | 12MW |
| Thermal output | 90MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | GE Vernova Hitachi Nuclear Energy |
| Owner | Japan Atomic Energy Agency100% |
| Operator | Japan Atomic Energy Agency |
| Construction start | 1 Dec 1960 |
|---|---|
| First criticality | 22 Aug 1963 |
| Grid connection | 26 Oct 1963 |
| Commercial operation | 15 Mar 1965 |
| Permanent shutdown | 18 Mar 1976 |
Japan Power Demonstration Reactor nuclear power plant in context
The one unit with both construction and grid dates on record took 2.9 years from construction start to grid connection; the median across all reactors connected in the 1960s is 5.0 years.
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Japan Power Demonstration Reactor nuclear power plant | 1960 | 1963 | 2.9 | 5.0 (1960s) |
How these are worked out: ranks use gross operating capacity; ages count from the start-up year on record, as on the age page; build times run from construction start to grid connection, as on the build-times page; ratings are the tracker's net and design net capacity, as on the uprates page. Distances are straight-line between exact positions, so a site with only an approximate position gets none. A unit missing a date or a rating is left out of the figure that needs it.
| Location | Ibaraki, Japan |
|---|---|
| Coordinates | 36.4568, 140.6059approximate |
| Elevation | not given: the position is only approximate |
| Setting | not given: the position is only approximate |
| Region | Eastern Asia |
| Units by status | Retired: 1 |
| Owners | Japan Atomic Energy Agency |
|---|---|
| Operators | Japan Atomic Energy Agency |
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Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data