Ikata Nuclear Power Plant
|Ikata Nuclear Power Plant|
The Ikata NPP, August 2006
|Construction began||September 1, 1973|
|Commission date||September 30, 1977|
|Operator(s)||Shikoku Electric Power Company|
|Nuclear power station|
|Cooling source||Iyo-nada Sea|
|Units operational||1 x 566 MW|
1 x 890 MW
|Units decommissioned||1 x 566 MW|
|Nameplate capacity||1,456 MW|
|Annual net output||603.4 GW·h|
|Commons||Related media on Commons|
The Ikata Nuclear Power Plant (伊方発電所, Ikata hatsudensho, Ikata NPP) is a nuclear power plant in the town of Ikata in the Nishiuwa District of Ehime Prefecture, Japan. It is the only nuclear plant on the island of Shikoku. It is owned and operated by the Shikoku Electric Power Company. The plant was shut down along with all other nuclear plants in Japan following the Fukushima Daiichi nuclear disaster. Unit 3 was reactivated using plutonium-uranium mixed oxide fuel on 12 August 2016 and began providing electricity to the grid three days later. On December 13, 2017, the Hiroshima High Court issued a temporary injunction to halt the operation of the Ikata 3 nuclear reactor in Japan's Shikoku region until September 2018.
The plant is on a site with an area of 860,000 square metres (210 acres); 47% of the plant site is green, in comparison the non-nuclear plants Shikoku Electric operates are 13.8, 20.1, 21.2 and 45.5%.
Reactors on site
|Unit||Reactor type||Capacity||First criticality||Commissioned||Type||Comments|
|Ikata - 1||PWR||566 MW||February 17, 1977||September 30, 1977||Mitsubishi 2-loop plant||To be decommissioned|
|Ikata - 2||PWR||566 MW||August 19, 1981||March 19, 1982||Mitsubishi 2-loop plant||To be decommissioned|
|Ikata - 3||PWR||890 MW||March 29, 1994||December 15, 1994||Mitsubishi/Westinghouse 3-loop plant||Suspended until Sep 2018|
On March 3, 2004 there was a coolant leak in Unit 3.
In January 2006 Mitsubishi Heavy Industries announced the completion of the replacement of the internal structure of the No.1 reactor. It was the world's first all-in-one extraction and replacement of the core internals of a PWR reactor. The upper and lower internals of the reactor were replaced in order to accommodate more control rods and allow for higher fuel burnup.
Maintenance in 2011
On Sunday 4 September reactor no. 1 was shut down for regular inspections. These check-ups would last at least three months. At that time reactor No.3 was also shut down, although the normal inspections were long time finished before September. To resume operation, a stress test was required for all suspended reactors by the government, after the accidents in Fukushima. The Ehime prefectural government said it would decide whether to approve the resumption of operations after the results of the safety test came out. The Shikoku Electric Power Company said that if the No. 3 reactor did not resume operations, power supplies would be very tight in winter when electricity demand would be high. It was considered to restart a thermal power-plant which had been long out of use.
Nuclear evacuation drill held in 2012
In February 2012 an evacuation drill was held in the prefecture Ehime and Shimane. The drill was done to mimic the situation of a reactor cooling failure after a huge earthquake. The evacuation-zones were expanded from 10 to 30 kilometers after the disaster in Fukushima Daiichi nuclear power plant. In this evacuation drill some 10.000 people were taken out of the area round the nuclear power plant, with buses, helicopters and boats of the Maritime Self-Defense Force. The residents in the town of Ikata, commanded by disaster announcements on the radio to gather at a junior high school. From there they were taken by buses to a shelter some 50 kilometers further. This drill was the very first ever executed on this scale, and it was also the first time that so many people were evacuated out from their town.
Unit 3 restart in 2016
On 19 April 2016, unit 3 received from NRA the final approval to restarting. On 27 June, Shikoku Electric completed loading 157 fuel assemblies, of which 16 uranium-plutonium mixed oxide (MOX). Unit 3 achieved criticality on 13 August and resumed commercial service on 7 September. However, on 13 December 2017 the Hiroshima High Court revoked the lower court decision, ordering the close of the unit until the end of September 2018. Shikoku Electric plans to appeal. The dispute centres on the evaluation of earthquake risk under the stricter post Fukushima regulations. In January 2020 the High Court passed a further injunction against the operation of unit 3, again in part because an active fault nearby could not be ruled out as a full geological survey of the area had not been conducted.
In Godzilla vs. Destoroyah, Godzilla approaches the nuclear plant, and the actions of the Japan Self Defense Forces are stalled in action against the monster, fearing that a direct attack could cause a nuclear explosion and destroy the planet. Thankfully, the Super X-III weapon comes to the rescue and freezes the beast before he can do any more harm.
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- "Archived copy". Archived from the original on 2011-10-04. Retrieved 2010-01-14.CS1 maint: archived copy as title (link)
- Jaif (4 sept 2011) Another Japanese reactor stops for regular checks Archived 2012-04-19 at the Wayback Machine
- NHK-world (16 February 2012)Nuclear evacuation drill held in Ehime Prefecture[permanent dead link]
- JAIF (16 February 2012)Earthquake-report 349[permanent dead link]
- "Completion of the 3-step conformity review on the New Regulatory Requirements for Ikata Power Station Unit 3" (PDF). www.nsr.go.jp. NRA. 20 April 2016. Retrieved 6 July 2016.
- "Ikata-3 Fuel Loading Completed, with Commercial Operation to Resume in August". www.prnewswire.com. 28 June 2016. Archived from the original on 6 July 2016. Retrieved 6 July 2016.
- "Ikata 3 back in commercial operation". Retrieved 7 February 2017.
- "Japanese court orders Ikata 3 to close". Nuclear Engineering International. 15 December 2017. Retrieved 18 December 2017.
- "Second injunction keeps Ikata reactor offline". World Nuclear News. 17 January 2020. Retrieved 20 January 2020.
- "Godzilla vs. Destoroyah (1995) -- Full Movie Review!". Retrieved 7 February 2017.
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