Asco
Reactor Data
Reactor Units
Every power reactor at this site as listed in the IAEA Power Reactor Information System (PRIS): reactor type and model, net electrical capacity, grid connection and commercial operation dates, and current status.
2 units: 2 operational.
Net capacity in service: 1,992 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Asco 1 | PWR | WH 3LP | 995 | 1974-05-16 | 1983-08-13 | 1984-12-10 | Operational | |
| Asco 2 | PWR | WH 3LP | 997 | 1975-03-07 | 1985-10-23 | 1986-03-31 | Operational |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Asco 1 | 888 | 1,033 | 2,941 | 1983-06-16 | WESTINGHOUSE ELECTRIC CORPORATION | WESTINGHOUSE ELECTRIC CORPORATION | |
| Asco 2 | 888 | 1,027 | 2,941 | 1985-09-11 | WESTINGHOUSE ELECTRIC CORPORATION | WESTINGHOUSE ELECTRIC CORPORATION |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Asco 1 | 299.9 TWh | 85.1% | 85.7% | 88.1% |
| Asco 2 | 293.9 TWh | 86.7% | 87.4% | 89.7% |
Operator: ASOCIACIÓN NUCLEAR ASCÓ-VANDELLÓS A.I.E. (ENDESA/ID)
Owner: ENDESA, S.A.; ENDESA, IBERDROLA
Source: IAEA Power Reactor Information System (PRIS), as of 2026-11-02.
Fuel Cycle Facilities
Fuel cycle plants at this site, as listed in the IAEA Nuclear Fuel Cycle Facilities Database: what each plant does, its scale and design capacity, the years it operated, its current status and who operates it.
1 facility: 1 in operation.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| AFR DSF-ASCO | AFR Dry Spent Fuel Storage | Commercial | 475 t HM | 2013– | In Operation |
Source: IAEA Nuclear Fuel Cycle Facilities Database (NFCFDB), as of 2026-10-13.
Working Here
Per Diem Rates FY 2026
Per diem covers lodging and meals & incidental expenses (M&IE) for government and contractor travel near this facility. Rates are from the U.S. State Department foreign per diem tables for FY 2026.
$246
Lodging/Night
$146
M&IE/Day
$392
Total/Day
Spain: rate for locations the State Department does not list separately
U.S. Department of State foreign per diem, for U.S. government and contractor travel.
Photos
Photos of this facility from the NukeWorker photo gallery. Click the header or any photo to browse the full album.
Facility Map
Interactive satellite map showing the facility's geographic location. Marker color indicates current status: green for online, red for offline, orange for reduced power. Click the header to open in Google Maps satellite view.
41.205, 0.573284
Location & Contact
Physical address, phone number, and website for this facility. Use the directions link to get driving directions via Google Maps.
Plant Facts
About This Site
Written by NukeWorker from public records: facts that do not change. Operator, status and capacity come from the live data elsewhere on this page. Sources: Wikipedia: Asc%C3%B3 Nuclear Power Plant; Foro Nuclear: The fifth Spanish nuclear power plant, Ascó I and II; Global Energy Monitor: Ascó nuclear power plant.
Ascó is a nuclear power plant at Ascó in Catalonia, Spain, with cooling water from the Ebro River.
Read more
Construction of Unit 1 began in May 1974 and Unit 2 in March 1975. Both units are Westinghouse-designed pressurized water reactors. Unit 1 was connected to the grid on 13 August 1983 and entered commercial operation in December 1984. Unit 2 was connected on 23 October 1985. In November 2007 a release of radioactive particles occurred at Unit 1, first rated INES level 1 and reclassified as level 2 in April 2008.