Pilgrim nuclear power plant
Pilgrim nuclear power plant is a nuclear site in United States with 3 units on record. None is currently operating.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Unit 1 | Retired | BWR | BWR-3 (Mark 1) | 711 | 1972 |
| Unit 2 | Cancelled | PWR | - | 1,180 | - |
| Unit 3 | Cancelled | PWR | - | 1,180 | - |
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.
Pilgrim nuclear power plant 1 Retired
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | BWR-3 |
| Size class | Large |
| Gross capacity | 711MW |
| Net capacity | 677MW |
| Thermal output | 2,028MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | GE Vernova Hitachi Nuclear Energy |
| Owner | Entergy Nuclear Operations Inc100% |
| Operator | Entergy Nuclear Operations |
| Construction start | 26 Aug 1968 |
|---|---|
| First criticality | 16 Jun 1972 |
| Grid connection | 19 Jul 1972 |
| Commercial operation | 1 Dec 1972 |
| Permanent shutdown | 31 May 2019 |
Pilgrim nuclear power plant 2 Cancelled
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | not disclosed |
| Size class | Large |
| Gross capacity | 1,180MW |
| Net capacity | not disclosed |
| Thermal output | not disclosed |
| Enrichment | 3–5% U-235 |
| NSSS vendor | not on record |
| Cancelled | 1981 |
| Owner | Boston Edison Co100% |
| Milestones | no dates on record |
|---|
Pilgrim nuclear power plant 3 Cancelled
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | not disclosed |
| Size class | Large |
| Gross capacity | 1,180MW |
| Net capacity | not disclosed |
| Thermal output | not disclosed |
| Enrichment | 3–5% U-235 |
| NSSS vendor | not on record |
| Cancelled | 1974 |
| Milestones | no dates on record |
|---|
Pilgrim nuclear power plant in context
The one unit with both construction and grid dates on record took 3.9 years from construction start to grid connection; the median across all reactors connected in the 1970s is 5.4 years.
The nearest other tracked nuclear sites are Seabrook nuclear power plant (109 km) and Millstone nuclear power plant (150 km).
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Unit 1 | 1968 | 1972 | 3.9 | 5.4 (1970s) |
Nearest tracked nuclear sites
| Site | Country | Distance | Operating GW gross |
|---|---|---|---|
| Seabrook nuclear power plant | United States | 109 km | 1.3 |
| Millstone nuclear power plant | United States | 150 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 | Massachusetts, United States |
|---|---|
| Coordinates | 41.9436, -70.5771 |
| Elevation | about 10 mabove sea level |
| Setting | On the sea coast, 1.2 km from the water |
| Region | Northern America |
| Units by status | Retired: 1 Cancelled: 2 |
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 | Entergy Nuclear Operations Inc Boston Edison Co |
|---|---|
| Operators | Entergy Nuclear Operations |
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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