United States · 46.471, -119.334Columbia
Columbia, nuclear power plant in United States, operates one boiling water reactor with 1,131 MW net installed capacity and has been in service since 1984.
Unit Columbia 1 has been operating for 42 years, since 1984. Its 1,131 MW net are enough to supply about 3,560,000 households.
- Country
- United States
- Units
- 2
- Technology
- BWR
- Net capacity
- 1,131 MWe
- First grid connection
- 1984
- Operator
- Energy Northwest
- Owner
- Energy Northwest
- Status
- Operating
See also: alerts for this plant · every plant in United States · Nuclear power plants in Washington · Vendor: General Electric · every BWR reactor · how a BWR works
Units
| Unit | Type | Model | Status | MWe | MWt | Construction start | Grid connection | Closure | Licence until | Load factor |
|---|---|---|---|---|---|---|---|---|---|---|
| Columbia 1 | Boiling water (BWR) | BWR-5 (Mark 2) | Operating | 1,131 | 3,486 | Aug 1, 1972 | May 27, 1984 | — | Dec 20, 2043 | 84.9 % (2023) |
| Columbia EPU | Boiling water (BWR) | BWR-5 (Mark 2) | Planned | 162 | — | — | 2031 (planned) | — | — | — |
Data: IAEA PRIS · Global Energy Monitor · Wikipedia · updated on Sep 17, 2026
Columbia 1, a 1,131 MWe BWR (BWR-5 (Mark 2)), started construction in 1972, was connected to the grid in 1984 and is still operating, with a 84.9% load factor in 2023.
Columbia EPU, a 162 MWe gross BWR (BWR-5 (Mark 2)), is planned, with grid connection expected in 2031.
Operator: Energy Northwest.