Kashiwazaki-Kariwa Nuclear Power Plant
The Kashiwazaki-Kariwa Nuclear Power Plant (柏崎刈羽原子力発電所, Kashiwazaki-Kariwa genshiryoku-hatsudensho, Kashiwazaki-Kariwa NPP) is a large, modern (housing the world's first advanced boiling water reactor or ABWR) nuclear power plant on a 4.2-square-kilometer (1,000-acre) site. The campus spans the towns of Kashiwazaki and Kariwa in Niigata Prefecture, Japan, on the coast of the Sea of Japan, where it gets cooling water. The plant is owned and operated by Tokyo Electric Power Company (TEPCO), and it is the largest nuclear generating station in the world by net electrical power rating.
| Kashiwazaki-Kariwa Nuclear Power Plant | |
|---|---|
Aerial view, units 5, 6, and 7 | |
| Country | Japan |
| Location |
|
| Coordinates | 37°25′42″N 138°36′06″E |
| Status | Out of service |
| Construction began | June 5, 1980 |
| Commission date | September 18, 1985 |
| Owner(s) |
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| Operator(s) | Tokyo Electric Power Company |
| Cooling source | Sea of Japan |
| Power generation | |
| Units operational | 5 × 1,067 MW 2 × 1,315 MW |
| Nameplate capacity | 7,965 MW |
| Capacity factor | 0% |
| Annual net output | 0 GW·h |
| External links | |
| Website | www |
| Commons | Related media on Commons |
On July 16, 2007, the Chūetsu offshore earthquake took place, with its epicenter located only 19 km (12 mi) from the plant. The earthquake registered Mw 6.6, ranking it among the strongest earthquakes to occur in immediate range of a nuclear power plant. This shook the plant beyond design basis and initiated an extended shutdown for inspection, which indicated that greater earthquake-proofing was needed before operation could be resumed. The plant was completely shut down for 21 months following the earthquake. Unit 7 was restarted after seismic upgrades on May 19, 2009, followed later by units 1, 5, and 6. (Units 2, 3, and 4 were not restarted by the time of the March 2011 earthquake.)
The four restarted and operating units at the plant were not affected by the March 11, 2011 earthquake, but thereupon all units were shut down to carry out safety improvements. Tepco regained permission to restart units 6 and 7 from the Nuclear Regulation Authority (NRA) in 2017, but throughout 2023, all units remained idle. In December 2023, the NRA finally approved the reloading of fuel at the plant, citing improvements in the safety management system. As of 2024, Tepco is seeking permission from local authorities to restart the plant again.