Mitsubishi 3-loop
The Mitsubishi 3-loop is a Generation II pressurised water reactor from Mitsubishi Heavy Industries. 8 units are operating and 0 are under construction, out of 9 on record.
The Mitsubishi three-loop plant, and the design behind most of Japan's operating PWR fleet: Sendai 1 and 2, Ikata 3, Mihama 3, Ohi 1 and 2 and Takahama. Sendai 1 was the first Japanese reactor to restart after Fukushima, in August 2015, four and a half years after every unit in the country was taken offline.
| Vendor | Mitsubishi Heavy Industries |
|---|---|
| Reactor type | Pressurised water reactor (PWR) |
| Generation | II |
| Capacity range | 800–950 MWe gross |
| Also recorded as | M (3-loop)in the source tracker |
| Coolant | Light water |
| Typical enrichment | 3–5% U-235 |
| Japan | 9 units, 8 operating |
|---|
How long it took to build
Years from construction start to grid connection, for units with both dates on record. The median across 8 finished units is 3.6 years.
| Unit | Country | Started | Connected | Years |
|---|---|---|---|---|
| Takahama nuclear power plant 1 | Japan | 1970 | 1974 | 3.9 |
| Takahama nuclear power plant 2 | Japan | 1971 | 1975 | 3.9 |
| Mihama nuclear power plant 3 | Japan | 1972 | 1976 | 3.5 |
| Sendai nuclear power plant 1 | Japan | 1979 | 1983 | 3.8 |
| Takahama nuclear power plant 3 | Japan | 1980 | 1984 | 3.4 |
| Takahama nuclear power plant 4 | Japan | 1981 | 1984 | 3.6 |
| Sendai nuclear power plant 2 | Japan | 1981 | 1985 | 3.5 |
| Ikata nuclear power plant 3 | Japan | 1990 | 1994 | 3.5 |
All Mitsubishi 3-loop units
| Unit | Country | Status | Gross MW | Online |
|---|---|---|---|---|
| Ikata nuclear power plant 3 | Japan | 890 | 1994 | |
| Mihama nuclear power plant 3 | Japan | 826 | 1976 | |
| Sendai nuclear power plant 1 | Japan | 890 | 1984 | |
| Sendai nuclear power plant 2 | Japan | 890 | 1985 | |
| Takahama nuclear power plant 1 | Japan | 826 | 1974 | |
| Takahama nuclear power plant 2 | Japan | 826 | 1975 | |
| Takahama nuclear power plant 3 | Japan | 870 | 1985 | |
| Takahama nuclear power plant 4 | Japan | 870 | 1985 | |
| Tomari nuclear power plant 3 | Japan | Mothballed | 912 | 2009 |
Sources
- Mitsubishi 3-loop, vendor documentation
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data