Obninsk
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 |
|---|---|---|---|---|---|---|---|---|
| APS-1 Obninsk | LWGR | AM-1 | 5 | 1951-01-01 | 1954-06-26 | 1954-06-27 | 2002-04-29 | Permanent Shutdown |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| APS-1 Obninsk | 5 | 6 | 30 | 1954-05-06 | MINISTRY OF MEDIUM MACHINE BUILDING OF THE USSR (MINSREDMASH) | Institute for Physics and Power Engineering Named After A. I. Leypunsky | Decommissioning from 2010-04-21 |
Operator: MINISTRY OF MEDIUM MACHINE BUILDING OF THE USSR (MINSREDMASH)
Owner: MINISTRY OF MEDIUM MACHINE BUILDING OF THE USSR (MINSREDMASH)
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-19.
Research Reactors
Research and test reactors, critical assemblies and prototypes at this site, as listed in the IAEA Research Reactor Database: type, thermal power, first criticality, shutdown date, current status and what each is used for.
21 reactors: 4 operational, 13 decommissioned, 3 under decommissioning, 1 permanent shutdown.
| Reactor | Type | Thermal Power | First Criticality | Shutdown | Status | Used For |
|---|---|---|---|---|---|---|
| BFS-1 | Crit Assembly | 200 Wt | 1962-02-20 | Operational | ||
| WWR-TS | Tank Wwr | 15 MWt | 1964-11-04 | Operational | isotope production, transmutation, teaching, training | |
| BFS-2 | Crit Assembly | 1 kWt | 1969-09-30 | Operational | ||
| BARS-6 | Prompt Burst | 1 kWt | 1994-12-30 | Operational | ||
| BR-2 | Fast | 1 kWt | 1956-01-01 | Decommissioned | ||
| 27/VM | Pwr Power | 70 MWt | 1956-03-01 | Under decommissioning | ||
| SBR-2 | Fast, Hg Cooled | 15 kWt | 1957-03-01 | Decommissioned | ||
| BR-5 | Fast, Na Cooled | 5 MWt | 1958-01-01 | Decommissioned | ||
| BR-10 | Loop Type | 8 MWt | 1958-06-01 | 2002-01-01 | Permanent shutdown | |
| 27/VT | Fast, Power | 70 MWt | 1959-01-01 | Under decommissioning | ||
| RF-GS | Crit Assembly | 10 Wt | 1962-01-01 | Decommissioned | ||
| MATR-2 | Crit Assembly | 400 Wt | 1963-08-02 | Under decommissioning | ||
| BR-1 | Crit Assembly | 50 Wt | 1965-01-01 | Decommissioned | ||
| TOPAZ | Space Test | 15 kWt | 1966-01-01 | 1986-01-01 | Decommissioned | |
| FG-5 | Crit Assembly | 100 Wt | 1967-01-01 | Decommissioned | ||
| STRELA | Crit Assembly | 20 Wt | 1968-08-14 | Decommissioned | ||
| SGO | Crit Assembly | 100 Wt | 1969-01-01 | Decommissioned | ||
| COBRA | Crit Assembly | 300 Wt | 1970-01-01 | Decommissioned | ||
| Stend T-2 | Space Test | 2 Wt | 1970-01-01 | Decommissioned | ||
| FS-1M | Crit Assembly | 200 Wt | 1970-03-03 | Decommissioned | ||
| AMBF-2 | Crit Assembly | 100 Wt | 1984-11-22 | Decommissioned |
Source: IAEA Research Reactor Database (RRDB), 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.
$173
Lodging/Night
$112
M&IE/Day
$285
Total/Day
Russia: 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.
55.0839, 36.5704
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: Obninsk Nuclear Power Plant; IAEA PRIS: Russian Federation.
The Obninsk site is in Obninsk, Kaluga Oblast, about 110 km southwest of Moscow. It housed a small graphite-moderated, water-cooled reactor known as AM-1, rated at 5 MW electrical and 30 MW thermal.
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Construction began around 1950 to 1951. The reactor was connected to the grid on June 27, 1954. The next Soviet nuclear plant to join the grid was Beloyarsk Unit 1 in 1964. The reactor was permanently shut down on April 29, 2002, ending electricity production, and it was used afterward for research and isotope production.