Genkai Nuclear Power Plant
| Genkai Nuclear Power Plant | |
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Genkai Nuclear Power Plant (in the distance)
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 Location of Genkai Nuclear Power Plant in Japan
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| Country | Japan |
| Coordinates | 33°30′56″N 129°50′14″E / 33.51556°N 129.83722°ECoordinates: 33°30′56″N 129°50′14″E / 33.51556°N 129.83722°E |
| Construction began | September 15, 1971 |
| Commission date | October 15, 1975 |
| Owner(s) | Kyūshū Electric Power Company |
| Operator(s) | Kyushu Electric Power Company |
| Nuclear power station | |
| Reactor type | PWR |
| Cooling source | Korea Strait |
| Cooling towers | no |
| Power generation | |
| Units operational | 1 x 559 MW 2 x 1180 MW |
| Units decommissioned | 1 x 559 MW |
| Nameplate capacity | 2,919 MW |
| Average generation | 21,000 GW·h |
The Genkai Nuclear Power Plant (玄海原子力発電所 Genkai genshiryoku hatsudensho?, Genkai NPP) is a nuclear power plant located in the town of Genkai in the Higashimatsuura District in the Saga Prefecture. It is owned and operated by the Kyūshū Electric Power Company.
The reactors were all built by Mitsubishi Heavy Industries and are of the 2 and 4-loop M type pressurized water reactor. Unit 3 has been selected as a special Plutonium fuel test case. The plant is on a site with a total of 0.87 square kilometers.
Saga does not lie on a fault line and receives the fewest earthquakes in Japan. The 2005 Fukuoka earthquake was felt at the plant, but there was no equipment damage.
All reactors at the Genkai plant use low enriched (3-4%) Uranium dioxide fuel.
Genkai 1 belongs to the first generation of PWR built by Mitsubishi, based on imported technology.
Genkai 2 is the first reactor of the second generation of Mitsubishi's PWR, fully using its own technology.
Genkai 3 and 4 represent the third generation of Mitsubishi's PWR, with further improvements.
In early 2011, Units 2 and 3 were suspended for routine maintenance. Following the Tohoku earthquake, Kyushu Electric voluntarily sought reapproval with the town of Genkai and Saga prefecture to make sure that there would be no objection to turning the reactors back on. Negotiations extended several months past the normal restart time. Because Units 2 and 3 were not restarted for the summer, Kyushu was expected to have an electricity shortage and only be able to meet 85% of normal summer needs.
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