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 class | Large |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 684MW |
| Net capacity (reference) | 641MW |
| Net capacity (design) | 660MW |
| Thermal output | 2,011MWt |
| 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utilities do not publish fuel contracts.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