1st largest plant in Connecticut · 58th nationally
Millstone is a nuclear power plant in Connecticut with a nameplate capacity of 2,260 MW. It generates roughly 13.7M MWh per year — enough to power about 1,301,853 average U.S. homes.
Its capacity factor of 69% puts it in the middle range — running steadily but not full-time.
| Plant Name | Millstone |
|---|---|
| Operator | Dominion Energy Nuclear Conn Inc |
| City | Waterford |
| County | New London County |
| State | Connecticut |
| ZIP | 06385 |
| Coordinates | 41.31070, -72.16770 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 3 | Nuclear | Uranium | 1,350 MW | Operating | 1986 |
| 2 | Nuclear | Uranium | 910 MW | Operating | 1975 |
| Owner | Location | Share |
|---|---|---|
| Dominion Energy Nuclear Conn Inc | Waterford, CT | 9347.0% |
| Massachusetts Mun Wholes Electric Co | Ludlow, MA | 480.0% |
| Green Mountain Power Corp | Colchester, VT | 173.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| NERC Region | NPCC |
|---|---|
| Balancing Authority | Iso New England Inc. |
Nuclear plants generate carbon-free baseload electricity by fissioning uranium fuel inside a reactor. They run nearly around-the-clock — typical capacity factors above 90% — and a single facility can power millions of homes. Spent fuel is stored on-site in dry casks. NRC oversees safety; emergency planning zones extend 10 miles from the reactor.