Unterweser
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.
1 unit: 1 permanent shutdown.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Unterweser | PWR | PWR | 1,345 | 1972-07-01 | 1978-09-29 | 1979-09-06 | 2011-08-06 | Permanent Shutdown |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Unterweser | 1,230 | 1,410 | 3,900 | 1978-09-16 | KRAFTWERK UNION, AG | KRAFTWERK UNION, AG | Decommissioning from 2018-02-19 |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Unterweser | 289.8 TWh | 79.4% | 82.7% | 83.7% |
Operator: PreussenElektra GmbH
Owner: PreussenElektra GmbH
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 |
|---|---|---|---|---|---|---|
| Unterweser NPP On-Site Storage Facility | AFR Dry Spent Fuel Storage | Commercial | 800 t HM | 2007–2047 | In Operation | BundesGesel,Germany |
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.
$237
Lodging/Night
$140
M&IE/Day
$377
Total/Day
Germany: 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.
53.428, 8.47566
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: Unterweser Nuclear Power Plant.
Unterweser is a nuclear power plant at Kleinensiel in the municipality of Stadland, Lower Saxony, Germany, near Nordenham on the Weser River.
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Construction began on 1 July 1972. The plant had a single pressurized water reactor. It was connected to the grid on 29 September 1978. The reactor was taken off line on 17 March 2011 during the moratorium that followed the Fukushima accident, and it was permanently shut down on 6 August 2011. The last fuel rods were removed from the reactor in February 2019.