Sendai
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: 2 operational.
Net capacity in service: 1,692 MWe.
| Unit | Type | Model | Net MWe | Construction | Grid | Commercial Op | Shutdown | Status |
|---|---|---|---|---|---|---|---|---|
| Sendai 1 | PWR | M (3-loop) | 846 | 1979-12-15 | 1983-09-16 | 1984-07-04 | Operational | |
| Sendai 2 | PWR | M (3-loop) | 846 | 1981-10-12 | 1985-04-05 | 1985-11-28 | Operational |
Capacity, milestones and suppliers
| Unit | Design MWe | Gross MWe | Thermal MWt | First Criticality | Reactor Supplier | Turbine Supplier | Notes |
|---|---|---|---|---|---|---|---|
| Sendai 1 | 846 | 890 | 2,660 | 1983-08-25 | MITSUBISHI HEAVY INDUSTRIES, LTD. | Siemens AG, Power Generation | |
| Sendai 2 | 846 | 890 | 2,660 | 1985-03-18 | MITSUBISHI HEAVY INDUSTRIES, LTD. | Siemens AG, Power Generation |
Lifetime performance, through 2025
| Unit | Electricity Supplied | Load Factor | Energy Availability | Operating Factor |
|---|---|---|---|---|
| Sendai 1 | 238.2 TWh | 75.4% | 72.7% | 73.2% |
| Sendai 2 | 225.6 TWh | 76.3% | 74.0% | 74.4% |
Operator: Kyushu Electric Power Co., Inc.
Owner: Kyushu Electric Power Co., Inc.
Source: IAEA Power Reactor Information System (PRIS), as of 2026-10-19.
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
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.
31.8335, 130.189
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: Sendai Nuclear Power Plant.
Sendai Nuclear Power Plant is in Satsumasendai, Kagoshima Prefecture, on the island of Kyushu in Japan, on the East China Sea.
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Construction began on 15 December 1979. The two units are Mitsubishi three-loop pressurized water reactors. Unit 1 was connected to the grid on 16 September 1983 and entered commercial operation in 1984, and Unit 2 was connected on 5 April 1985 and entered commercial operation in November 1985. After the 2011 Fukushima accident, Unit 1 restarted on 11 August 2015, the first Japanese reactor to do so after the nationwide shutdowns that followed.