Oklo
Facility Data
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 decommissioned.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| Mounana | Uranium Ore Processing | Commercial | 1500 t U/year | 1977–1999 | Decommissioned | Compagnie des Mines d'Uranium de Farnceville (COMUF) |
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.
$184
Lodging/Night
$133
M&IE/Day
$317
Total/Day
Gabon: 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.
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.
-1.39342, 13.1592
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: Oklo.
Oklo is a geological region with uranium deposits in the Haut-Ogooué Province of Gabon, near Franceville, where the remains of natural nuclear fission reactors were found in the uranium mines.
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The discovery was made in 1972, when uranium from the mines was found to contain less uranium-235 than expected and geologists identified byproducts typical of a reactor. The reactions took place roughly 1.8 to 1.7 billion years ago, in the Paleoproterozoic era. They lasted a few hundred thousand years and probably averaged under 100 kW of thermal power. At that time natural uranium held about 3 percent uranium-235, and ordinary water acted as a neutron moderator.