Atucha
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.
3 units: 2 operational, 1 under construction.
Net capacity in service: 1,023 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Atucha 1 | PHWR | PHWR KWU | 335 | 1968-05-31 | 1974-03-19 | 1974-06-24 | Operational | |
| Atucha 2 | PHWR | PHWR KWU | 688 | 1981-07-09 | 2014-06-23 | 2016-05-22 | Operational | |
| CAREM25 | PWR | CAREM Prototype (Integrated-PWR) | 25 | 2015-08-25 | Under Construction |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Atucha 1 | 319 | 358 | 1,179 | 1974-01-13 | Siemens AG, Power Generation | Siemens AG, Power Generation | |
| Atucha 2 | 692 | 740 | 2,160 | 2014-05-30 | Siemens AG, Power Generation | KRAFTWERK UNION, AG | |
| CAREM25 | 25 | 29 | 100 | Comisión Nacional de Energía Atómica | will be provided later |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Atucha 1 | 107.8 TWh | 71.1% | 72.9% | 76.2% |
| Atucha 2 | 37.8 TWh | 52.4% | 52.6% | 69.3% |
Operator: NUCLEOELECTRICA ARGENTINA S.A.; COMISION NACIONAL DE ENERGIA ATOMICA
Owner: NUCLEOELECTRICA ARGENTINA S.A.; COMISION NACIONAL DE ENERGIA ATOMICA
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-19.
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.
2 facilities: 1 in operation, 1 shutdown.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| Atucha SF Storage Facility | AFR Wet Spent Fuel Storage (Pool) | Commercial | 986 t HM | 1988– | In Operation | Comision Nacional de Energia Atomica (CNEA) |
| Atucha HW Production Facility | Heavy Water Production | Pilot plant | 2 t/year | 1988– | Shutdown | Comision Nacional de Energia Atomica (CNEA) |
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.
$236
Lodging/Night
$120
M&IE/Day
$356
Total/Day
Argentina: 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.
-33.9675, -59.2059
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: Atucha Nuclear Power Plant.
Atucha is a nuclear power plant site at Lima, in Zárate Partido, Buenos Aires Province, Argentina, about 100 km from the city of Buenos Aires. It stands on the right bank of the Paraná de las Palmas river.
Read more
Construction of Atucha 1, a pressurized heavy-water reactor of Siemens (KWU) design, began in 1968, and the unit was connected to the grid on March 19, 1974. Construction of Atucha 2, a reactor of the same basic design, began in July 1981 under a Siemens contract and was halted in 1994. Work resumed in 2005 under a presidential decree. Atucha 2 reached first criticality on June 3, 2014, and was connected to the grid on June 23, 2014.