Tokai mura
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.
2 units: 1 suspended operation, 1 permanent shutdown.
Net capacity in service: 1,060 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Tokai 1 | GCR | MAGNOX | 137 | 1961-03-01 | 1965-11-10 | 1966-07-25 | 1998-03-31 | Permanent Shutdown |
| Tokai 2 | BWR | BWR-5 | 1,060 | 1973-10-03 | 1978-03-13 | 1978-11-28 | Suspended Operation |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Tokai 1 | 159 | 166 | 587 | 1965-05-04 | GENERAL ELECTRIC COMPANY (UK) | GENERAL ELECTRIC COMPANY (UK) | |
| Tokai 2 | 1,056 | 1,100 | 3,293 | 1978-01-18 | GENERAL ELECTRIC CO. | GENERAL ELECTRIC CO./ HITACHI, LTD. | Suspended 2011-03-11 |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Tokai 1 | 28.2 TWh | 70.8% | 75.7% | 78.7% |
| Tokai 2 | 221.6 TWh | 72.9% | 72.6% | 73.5% |
Operator: JAPAN ATOMIC POWER CO.
Owner: JAPAN ATOMIC POWER CO.
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-14.
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.
13 reactors: 3 operational, 5 decommissioned, 5 under decommissioning.
| Reactor | Type | Thermal Power | First Criticality | Shutdown | Status | Used For |
|---|---|---|---|---|---|---|
| NSRR | Triga Acpr | 3 kWt | 1975-06-30 | Operational | materials testing | |
| JRR-3M | Pool | 20 MWt | 1990-03-22 | Operational | isotope production, neutron scattering, neutron radiography, materials testing, transmutation, activation analysis, geochronology | |
| STACY | Crit Assembly | 200 Wt | 1995-02-23 | Operational | nuclear data | |
| JRR-1 | Homog (l) | 6 kWt | 1957-08-27 | Decommissioned | ||
| JRR-2 | Tank | 10 MWt | 1960-10-01 | Under decommissioning | ||
| AHCF | Crit Assembly | 10 Wt | 1961-01-01 | Decommissioned | ||
| JRR-3 | Heavy Water | 10 MWt | 1962-01-01 | Decommissioned | ||
| TCA Tank Critical Assembly | Crit Assembly | 200 Wt | 1962-08-23 | 2010-11-08 | Under decommissioning | teaching, training |
| JRR-4 | Pool | 3.5 MWt | 1965-01-28 | Under decommissioning | isotope production, materials testing, transmutation, activation analysis, geochronology, neutron capture therapy, training | |
| SCA | Crit Assembly | 200 Wt | 1966-08-01 | Decommissioned | ||
| FCA | Crit Fast | 2 kWt | 1967-04-29 | 2011-03-10 | Under decommissioning | teaching, training |
| VHTRC | Crit Assembly | 10 Wt | 1985-05-13 | Decommissioned | ||
| TRACY | Pulsing | 1 kWt | 1995-12-20 | 2011-03-08 | Under decommissioning |
Source: IAEA Research Reactor Database (RRDB), as of 2026-10-13.
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.
15 facilities: 6 in operation, 6 decommissioning, 2 shutdown, 1 decommissioned.
| Facility | Type | Scale | Design Capacity | Operated | Status | Operator |
|---|---|---|---|---|---|---|
| JAEA Tokai Plutonium Fuel Development Facility (Pu-1 - MOX) | MOX fuel fabrication (Mox Powder, Pellet, Pin, FA) | Laboratory | 0.3 t HM/year | 1965– | In Operation | Japan Atomic Energy Agency (JAEA) |
| MNF-Fuel Fabrication Facility | Fuel Fabrication (U Pellet, Pin, FA) | Commercial | 440 t U/year | 1972– | In Operation | Mitsubishi Nuclear Fuel (MNF) |
| MNF-Reconversion facility | Re-conversion to UO2 Powder | Commercial | 450 t U/year | 1972– | In Operation | Mitsubishi Nuclear Fuel (MNF) |
| NFI Tokai Works | Fuel Fabrication (U Pellet, Pin, FA) | Commercial | 250 t U/year | 1980– | In Operation | Nuclear Fuel Industries Ltd (NFI) |
| JAEA Tokai Plutonium Fuel Production Facility (Pu-3 - FBR) | MOX fuel fabrication (Mox Powder, Pellet, Pin, FA) | Pilot plant | 10 t HM/year | 1988– | In Operation | Japan Atomic Energy Agency (JAEA) |
| Tokai II NPP Site SFSF | AFR Dry Spent Fuel Storage | Commercial | 3714 Cask-Bund. | 2001– | In Operation | The Japan Atomic Power Company |
| JAEA Tokai Reprocessing Test Facility (JRTF) | Spent Fuel Reprocessing - aqueous route | Laboratory | 0 t HM/year | 1968–1970 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| JAEA Tokai Plutonium Fuel Fabrication Facility (Pu-2 - ATR) | MOX fuel fabrication (Mox Powder, Pellet, Pin, FA) | Pilot plant | 10 t HM/year | 1972–2001 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| JAEA Tokai Plutonium Fuel Fabrication Facility (Pu-2 - FBR) | MOX fuel fabrication (Mox Powder, Pellet, Pin, FA) | Pilot plant | 1 t HM/year | 1972–2001 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| JAEA Tokai Reprocessing Plant - Spent Fuel Storage | AFR Wet Spent Fuel Storage (Pool) | Pilot plant | 140 t HM | 1977–2018 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| JAEA Tokai Reprocessing Plant (TRP) | Spent Fuel Reprocessing - aqueous route | Pilot plant | 90 t U/year | 1977–2006 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| Japan Nuclear Fuel Conversion (JCO) | Re-conversion to UO2 Powder | Commercial | 718 t HM/year | 1981–1999 | Shutdown | Japan Nuclear Fuel Conv. Co |
| JAEA Tokai Reprocessing Plant - Plutonium Conversion Development Facility (PCDF) | MOX fuel fabrication (Mox Powder, Pellet, Pin, FA) | Pilot plant | 0.01 t HM/day | 1983–2016 | Decommissioning | Japan Atomic Energy Agency (JAEA) |
| Tokai Test Facility | Uranium Enrichment | Laboratory | 0 MTSWU/year | 1987–2003 | Decommissioned | Laser Atomic Separation Eng. Research Association of Japan |
| JAEA Tokai Uranium Enrichment Facilities (Building L) | Uranium Enrichment | Laboratory | 0 MTSWU/year | 1990–2002 | Shutdown | Japan Atomic Energy Agency (JAEA) |
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.
$208
Lodging/Night
$107
M&IE/Day
$315
Total/Day
Japan: 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
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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.
36.468, 140.608
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: Tokai Nuclear Power Plant.
Tokai is a village in Ibaraki Prefecture, Japan, on the Pacific coast, that hosts the Tokai Nuclear Power Plant along with a cluster of research reactors and nuclear fuel facilities.
Read more
Tokai Unit 1, a British-designed gas-cooled Magnox reactor, began construction on 1 March 1961, reached the grid on 10 November 1965 and entered commercial operation on 25 July 1966. It ceased operating on 31 March 1998. Tokai Unit 2, a General Electric boiling water reactor, began construction on 3 October 1973, reached the grid on 13 March 1978 and entered commercial operation on 28 November 1978. A criticality accident at a fuel facility in Tokai on 30 September 1999 killed two workers.