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The Tōkai Nuclear Power Plant (東海発電所, Tōkai hatsudensho, Tōkai NPP) was Japan's first nuclear power plant. It was built in the early 1960s to the British Magnox design, and generated power from 1966 until it was decommissioned in 1998. A second nuclear plant, built at the site in the 1970s, was the first in Japan to produce over 1000 MW of electricity, and still produces power as of 2009. The site is located in Tokai in the Naka District in Ibaraki Prefecture, Japan and is operated by the Japan Atomic Power Company.

Reactors on site

Unit	Type	Average electric power	Capacity	Construction started	Construction completed	First criticality	Closure
Tōkai I	Magnox (GCR)	159 MW	166 MW	March 1, 1961	November 10, 1965	July 25, 1966	March 31, 1988
Tōkai II	BWR/5^[1]	1060 MW	1100 MW	October 3, 1973	March 13, 1978	November 28, 1978

Unit 1

This reactor was built based on British developed Magnox technology. Unit 1 will be the first nuclear reactor to be decommissioned in Japan. The experience in decommissioning this plant is expected to be of use in the future when more Japanese plants are decommissioned. Below is a brief time-line of the process.

March 31, 1998: operations cease
March 2001: last of the nuclear fuel moved off-site
October 4, 2001: decommissioning plan announced
December 2001: decommissioning begins, spent fuel pool is cleaned
2003: turbine room and electric generator taken down
Late 2004: fuel moving crane dismantled
2011: the reactor itself is dismantled

Unit 2

This Boiling Water Reactor was the first nuclear reactor built in Japan to produce over 1000 MW of electricity. By some formalities in the paperwork, the unit is technically separate from the rest of the nuclear facilities at Tokai-mura, but it is managed with the rest of them and even shares the same front gate.

Incident

Following the 2011 Sendai earthquake and tsunami the number 2 reactor was one of eleven nuclear reactors to be shut down automatically.^[2] It was reported on 14 March that a cooling system pump for the number 2 reactor had stopped working.^[3] Japan Atomic Power Company stated that there was a second operational pump and cooling was working, but that two of three diesel generators used to power the cooling system were out of order.^[4]

References

^ "Reactors in operation". IAEA. 31 December 2009. Retrieved March 12, 2011.
^ "Japan earthquake: Evacuations ordered as fears grow of radiation leak at nuclear plant; News.com.au". news.com.au. 2011. Retrieved 13 March 2011. According to the industry ministry, a total of 11 nuclear reactors automatically shut down at the Onagawa plant, the Fukushima No. 1 and No. 2 plants and the Tokai No. 2 plant after the strongest recorded earthquake in the country's history
^ "Cooling system pump stops at Tokai No.2 plant-Kyodo; Energy & Oil; Reuters". af.reuters.com. 2011. Retrieved 13 March 2011.
^ "Tokai No.2 nuke plant cooling process working - operator | Reuters". uk.reuters.com. 2011. Retrieved 13 March 2011. Japan Atomic Power said Monday that the cooling process was working at its Tokai No.2 nuclear power plant's reactor although two of the three diesel power generators used for cooling were out of order.

External links

Media related to Tōkai Nuclear Power Plant at Wikimedia Commons

36°27′59″N 140°36′24″E / 36.46639°N 140.60667°E / 36.46639; 140.60667

[IAEA-2009-1] "Reactors in operation". IAEA. 31 December 2009. Retrieved March 12, 2011.

[2] "Japan earthquake: Evacuations ordered as fears grow of radiation leak at nuclear plant; News.com.au". news.com.au. 2011. Retrieved 13 March 2011. According to the industry ministry, a total of 11 nuclear reactors automatically shut down at the Onagawa plant, the Fukushima No. 1 and No. 2 plants and the Tokai No. 2 plant after the strongest recorded earthquake in the country's history

[3] "Cooling system pump stops at Tokai No.2 plant-Kyodo; Energy & Oil; Reuters". af.reuters.com. 2011. Retrieved 13 March 2011.

[4] "Tokai No.2 nuke plant cooling process working - operator | Reuters". uk.reuters.com. 2011. Retrieved 13 March 2011. Japan Atomic Power said Monday that the cooling process was working at its Tokai No.2 nuclear power plant's reactor although two of the three diesel power generators used for cooling were out of order.

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 == Incident ==
-Following the [[2011 Sendai earthquake and tsunami]] the number 2 reactor was one of eleven nuclear reactors to be shut down automatically.<ref>{{cite web |url= http://www.news.com.au/world/japan-earthquake-evacuations-ordered-as-fears-grow-of-radiation-leak-at-nuclear-plant/story-e6frfkyi-1226020473244 |title=Japan earthquake: Evacuations ordered as fears grow of radiation leak at nuclear plant; News.com.au |first= |last=|work=news.com.au |year=2011|quote=According to the industry ministry, a total of 11 nuclear reactors automatically shut down at the Onagawa plant, the Fukushima No. 1 and No. 2 plants and the Tokai No. 2 plant after the strongest recorded earthquake in the country's history|accessdate=13 March 2011}}</ref> It was reported on 14 March that a cooling system pump for the number 2 reactor had stopped working.<ref>{{cite web |url= http://af.reuters.com/article/energyOilNews/idAFTKG00708120110313 |title=Cooling system pump stops at Tokai No.2 plant-Kyodo; Energy & Oil; Reuters|first= |last= |work=af.reuters.com |year=2011  |accessdate=13 March 2011}}</ref> Japan Atomic Power Company stated that there was a second operational pump and cooling was working, but that two of three diesel generators used to power the cooling system were out of order.<ref>{{cite web |url= http://uk.reuters.com/article/2011/03/13/uk-japan-quake-tokai-idUKTRE72C2RL20110313 |title=Tokai No.2 nuke plant cooling process working - operator &#124; Reuters |first= |last=|work=uk.reuters.com |year=2011 |quote=Japan Atomic Power said Monday that the cooling process was working at its Tokai No.2 nuclear power plant's reactor although two of the three diesel power generators used for cooling were out of order. |accessdate=13 March 2011}}</ref>
+Following the [[2011 Sendai earthquake and tsunami]] the number 2 reactor was one of eleven nuclear reactors [[SCRAM|to be shut down automatically]].<ref>{{cite web |url= http://www.news.com.au/world/japan-earthquake-evacuations-ordered-as-fears-grow-of-radiation-leak-at-nuclear-plant/story-e6frfkyi-1226020473244 |title=Japan earthquake: Evacuations ordered as fears grow of radiation leak at nuclear plant; News.com.au |first= |last=|work=news.com.au |year=2011|quote=According to the industry ministry, a total of 11 nuclear reactors automatically shut down at the Onagawa plant, the Fukushima No. 1 and No. 2 plants and the Tokai No. 2 plant after the strongest recorded earthquake in the country's history|accessdate=13 March 2011}}</ref> It was reported on 14 March that a cooling system pump for the number 2 reactor had stopped working.<ref>{{cite web |url= http://af.reuters.com/article/energyOilNews/idAFTKG00708120110313 |title=Cooling system pump stops at Tokai No.2 plant-Kyodo; Energy & Oil; Reuters|first= |last= |work=af.reuters.com |year=2011  |accessdate=13 March 2011}}</ref> Japan Atomic Power Company stated that there was a second operational pump and cooling was working, but that two of three diesel generators used to power the cooling system were out of order.<ref>{{cite web |url= http://uk.reuters.com/article/2011/03/13/uk-japan-quake-tokai-idUKTRE72C2RL20110313 |title=Tokai No.2 nuke plant cooling process working - operator &#124; Reuters |first= |last=|work=uk.reuters.com |year=2011 |quote=Japan Atomic Power said Monday that the cooling process was working at its Tokai No.2 nuclear power plant's reactor although two of the three diesel power generators used for cooling were out of order. |accessdate=13 March 2011}}</ref>
 ==References==