Nuclear Power Demonstration (NPD) nuclear power plant
Nuclear Power Demonstration (NPD) nuclear power plant is a nuclear site in Canada with 1 unit on record. None is currently operating.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Nuclear Power Demonstration (NPD) nuclear power plant | Retired | PHWR | CANDU | 25 | 1962 |
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.
Nuclear Power Demonstration (NPD) nuclear power plant Retired
| Reactor type | Pressurised heavy water reactor (PHWR) |
|---|---|
| Model | CANDU |
| Size class | Small |
| Gross capacity | 25MW |
| Net capacity | 22MW |
| Thermal output | 92MWt |
| Enrichment | Natural uranium, 0.71% U-235no enrichment required |
| NSSS vendor | AtkinsRéalis (Candu Energy) |
| Owner | AECL100% |
| Operator | Ontario Hydro |
| Construction start | 1 Jan 1958 |
|---|---|
| First criticality | 11 Apr 1962 |
| Grid connection | 4 Jun 1962 |
| Commercial operation | 1 Oct 1962 |
| Permanent shutdown | 1 Aug 1987 |
Nuclear Power Demonstration (NPD) nuclear power plant in context
The one unit with both construction and grid dates on record took 4.4 years from construction start to grid connection; the median across all reactors connected in the 1960s is 5.0 years.
The nearest other tracked nuclear sites are Darlington New nuclear power plant (270 km), Darlington nuclear power plant (271 km) and Pickering nuclear power plant (287 km).
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Nuclear Power Demonstration (NPD) nuclear power plant | 1958 | 1962 | 4.4 | 5.0 (1960s) |
Nearest tracked nuclear sites
| Site | Country | Distance | Operating GW gross |
|---|---|---|---|
| Darlington New nuclear power plant | Canada | 270 km | - |
| Darlington nuclear power plant | Canada | 271 km | 3.7 |
| Pickering nuclear power plant | Canada | 287 km | 2.2 |
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 | Ontario, Canada |
|---|---|
| Coordinates | 46.1867, -77.6578 |
| Elevation | about 130 mabove sea level |
| Setting | About 260 km from the sea |
| Region | Northern America |
| Units by status | Retired: 1 |
Elevation is read at the listed coordinates from a 30 m terrain model (SRTM 30 m). Two independent models differ by a median of 6 m across our plants and by up to about 40 m on steep or coastal ground, and a point on a shoreline can read as sea level. Distance to the water is measured to a generalised 1:10 million coastline, so a few kilometres or less is not resolved. This is context, not a design-basis or flood-risk figure.
| Owners | AECL |
|---|---|
| Operators | Ontario Hydro |
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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