Rancho Seco nuclear power plant 1
Retired United States
Gross capacity
917MW
Rancho Seco nuclear power plant 1 is a pressurised water reactor unit at Rancho Seco nuclear power plant in United States rated at 917 MW gross. It is retired. Commercial operation began 17 Apr 1975.
Specification
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | not disclosed |
| Size | Largeabove 300 MWe |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 917MW |
| Net capacity (reference) | 873MW |
| Net capacity (design) | 918MW |
| Thermal output | 2,772MWt |
| NSSS vendor | not on record |
| Typical enrichment | 3–5% U-235 |
Ownership & location
| Site | Rancho Seco nuclear power plant |
|---|---|
| Unit | 1 |
| Country | United States |
| Owner | Sacramento Municipal Utility District100% |
| Operator | Sacramento Municipal Utility District |
| Coordinates | 38.3445, -121.1206 |
Fuel chain for this unit
Fuel form
Uranium dioxide pellets in zirconium-alloy cladding
Enrichment
3–5% U-235
Who makes this assembly
- China National Nuclear Corporation PWR fuel assemblies
- ENUSA Industrias Avanzadas PWR and BWR fuel assemblies
- Framatome PWR fuel assemblies
- KEPCO Nuclear Fuel PWR fuel assemblies
- Mitsubishi Heavy Industries PWR fuel assemblies
- Westinghouse Electric Company PWR 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utilities do not publish fuel contracts.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 Apr 1969Construction start
- 16 Sep 1974First criticality
- 13 Oct 1974Grid connection
- 17 Apr 1975Commercial operation
- 7 Jun 1989Permanent shutdown
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 2024-05-29
- 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