Paks
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.
5 units: 4 operational, 1 under construction.
Net capacity in service: 1,916 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Paks 1 | PWR | VVER V-213 | 479 | 1974-08-01 | 1982-12-28 | 1983-08-10 | Operational | |
| Paks 2 | PWR | VVER V-213 | 479 | 1974-08-01 | 1984-09-06 | 1984-11-14 | Operational | |
| Paks 3 | PWR | VVER V-213 | 479 | 1979-10-01 | 1986-09-28 | 1986-12-01 | Operational | |
| Paks 4 | PWR | VVER V-213 | 479 | 1979-10-01 | 1987-08-16 | 1987-11-01 | Operational | |
| Paks 5 | PWR | VVER-1200/V-527 | 1,185 | 2026-02-05 | Under Construction |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Paks 1 | 408 | 509 | 1,485 | 1982-12-14 | ATOMENERGOEXPORT | Kharkiv Turbine Plant "Turboatom" | |
| Paks 2 | 410 | 506 | 1,485 | 1984-08-26 | ATOMENERGOEXPORT | Kharkiv Turbine Plant "Turboatom" | |
| Paks 3 | 410 | 506 | 1,485 | 1986-09-15 | ATOMENERGOEXPORT | Kharkiv Turbine Plant "Turboatom" | |
| Paks 4 | 410 | 506 | 1,485 | 1987-08-09 | ATOMENERGOEXPORT | Kharkiv Turbine Plant "Turboatom" | |
| Paks 5 | 1,185 | 1,265 | 3,200 | Atomenergomash | Arabelle Solutions |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Paks 1 | 146.8 TWh | 87.9% | 87.1% | 88.2% |
| Paks 2 | 137.3 TWh | 84.5% | 83.7% | 84.6% |
| Paks 3 | 136.1 TWh | 88.4% | 87.5% | 88.6% |
| Paks 4 | 135.6 TWh | 89.2% | 88.3% | 89.6% |
Operator: PAKS NUCLEAR POWER PLANT, LTD.; Paks II. Nuclear Power Plant Private Company Limited by Shares
Owner: HUNGARIAN POWER COMPANIES LTD.; Paks II. Nuclear Power Plant Private Company Limited by Shares
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 |
|---|---|---|---|---|---|---|
| PURAM PAKS SITE SFISF | AFR Dry Spent Fuel Storage | Commercial | 14228 Cask-Bund. | 1997– | In Operation | Paks Nuclear Power Plant Ltd |
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.
$152
Lodging/Night
$75
M&IE/Day
$227
Total/Day
Hungary: 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.
46.578, 18.8534
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: Paks Nuclear Power Plant.
Paks is a nuclear power plant near the town of Paks in Tolna County, Hungary, on the Danube, about 100 km southwest of Budapest. It has four VVER-440/V213 pressurized water reactors, a Soviet design, with Atomstroyexport listed as the reactor supplier.
Read more
Construction of units 1 and 2 began in 1974, and of units 3 and 4 in 1979. The units were first connected to the grid between December 1982 and August 1987. On 10 April 2003, an incident in the fuel cleaning system of unit 2 released krypton-85 and damaged fuel elements; it was first rated level 2 and then level 3 on the International Nuclear Event Scale. On 14 January 2014, Hungary and Rosatom signed an agreement for an expansion with two VVER-1200 reactors.