Millstone nuclear power plant 1
Retired United States
Gross capacity
684MW
Millstone nuclear power plant 1 is a boiling water reactor unit at Millstone nuclear power plant in United States rated at 684 MW gross. It is retired. Commercial operation began 1 Mar 1971.
Specification
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | not disclosed |
| Size | Largeabove 300 MWe |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 684MW |
| Net capacity (reference) | 641MW |
| Net capacity (design) | 660MW |
| Thermal output | 2,011MWt |
| NSSS vendor | not on record |
| Typical enrichment | 3–5% U-235 |
Ownership & location
| Site | Millstone nuclear power plant |
|---|---|
| Unit | 1 |
| Country | United States |
| Operator | Dominion Energy |
| Coordinates | 41.3107, -72.1677 |
Fuel chain for this unit
Fuel form
Uranium dioxide pellets in zirconium-alloy cladding
Enrichment
3–5% U-235
Who makes this assembly
- Framatome BWR fuel assemblies
- Global Nuclear Fuel BWR fuel assemblies
- Westinghouse Electric Company BWR fuel assemblies
Upstream
Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.
Fabricator capability is recorded against reactor type and model line, not against named units,
utilities do not publish fuel contracts. See the fuel chain.
Timeline
- 1 May 1966Construction start
- 26 Oct 1970First criticality
- 29 Nov 1970Grid connection
- 1 Mar 1971Commercial operation
- 1 Jul 1998Permanent shutdown
Other units at Millstone nuclear power plant
| Unit | Status | Gross MW |
|---|---|---|
| Millstone nuclear power plant 2 | 918 | |
| Millstone nuclear power plant 3 | 1,280 |
Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06 · this unit last researched by GEM on 2024-05-28
- 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