Mitsubishi 2-loop
The Mitsubishi 2-loop is a Generation II pressurised water reactor from Mitsubishi Heavy Industries. 0 units are operating and 0 are under construction, out of 7 on record.
Mitsubishi's smallest PWR, built at Genkai, Ikata and Mihama under an early Westinghouse licence. All of them are now shut down: the post-Fukushima backfit requirements cost more than the remaining life of a 560 MWe unit could justify, which is why Japan's restarts have concentrated on the larger plants.
| Vendor | Mitsubishi Heavy Industries |
|---|---|
| Reactor type | Pressurised water reactor (PWR) |
| Generation | II |
| Capacity range | 500–600 MWe gross |
| Also recorded as | M (2-loop)in the source tracker |
| Coolant | Light water |
| Typical enrichment | 3–5% U-235 |
| Japan | 7 units |
|---|
How long it took to build
Years from construction start to grid connection, for units with both dates on record. The median across 5 finished units is 3.4 years.
| Unit | Country | Started | Connected | Years |
|---|---|---|---|---|
| Mihama nuclear power plant 2 | Japan | 1968 | 1972 | 3.9 |
| Genkai nuclear power plant 1 | Japan | 1971 | 1975 | 3.4 |
| Ikata nuclear power plant 1 | Japan | 1973 | 1977 | 3.5 |
| Genkai nuclear power plant 2 | Japan | 1977 | 1980 | 3.3 |
| Ikata nuclear power plant 2 | Japan | 1978 | 1981 | 3.0 |
All Mitsubishi 2-loop units
| Unit | Country | Status | Gross MW | Online |
|---|---|---|---|---|
| Genkai nuclear power plant 1 | Japan | Retired | 559 | 1975 |
| Genkai nuclear power plant 2 | Japan | Retired | 559 | 1981 |
| Ikata nuclear power plant 1 | Japan | Retired | 566 | 1977 |
| Ikata nuclear power plant 2 | Japan | Retired | 566 | 1982 |
| Mihama nuclear power plant 2 | Japan | Retired | 500 | 1972 |
| Tomari nuclear power plant 1 | Japan | Mothballed | 579 | 1989 |
| Tomari nuclear power plant 2 | Japan | Mothballed | 579 | 1991 |
Sources
- Mitsubishi 2-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