Tsuruga nuclear power plant
| Tsuruga nuclear power plant | ||
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 on the right |
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| location | ||
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| Coordinates | 35 ° 45 '8 " N , 136 ° 1' 15" E | |
| Country: |
 Japan
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| Data | ||
| Owner: | Japan Atomic Power Company | |
| Operator: | Japan Atomic Power Company | |
| Project start: | 1965 | |
| Commercial operation: | March 14, 1970 | |
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Active reactors (gross): |
1 (1160 MW) | |
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Decommissioned reactors (gross): |
1 (357 MW) | |
| Energy fed in in 2006: | 9,096 GWh | |
| Energy fed in since commissioning: | 234,086 GWh | |
| Website: | Tsuruga-1: (Japanese) ( Memento from December 1, 2007 in the Internet Archive ), (English) ( Memento from March 18, 2011 in the Internet Archive ) Tsuruga-2: (Japanese) ( Memento from June 28, 2010 in the Internet Archive ), (English) ( Memento from January 13, 2010 in the Internet Archive ) |
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| Was standing: | July 25, 2007 | |
| The data source of the respective entries can be found in the documentation . | ||
The Tsuruga nuclear power plant ( Japanese 賀 発 電 所 , Tsuruga hatsudensho ) is located near the city of Tsuruga in Fukui Prefecture . The plant differs technically from all other plants in Japan, as it is the only nuclear power plant at which a pressure and a boiling water reactor have been built side by side. The design of the individual reactors is also unique in Japan (see below).
Block 1
Unit 1 was the first boiling water reactor to go online in Japan . The manufacturer was General Electric . Its construction time of 48 months was unusually short. The reactor was cooled by sea water. In contrast to all other boiling water reactors in Japan, the reactor building of Tsuruga 1 is not rectangular, but cylindrical.
The official shutdown of Unit 1 was carried out on April 27, 2015. The block has been offline since 2011 and has been the oldest active nuclear power plant in Japan since Tokai 1 was shut down in 1998.
Block 2
Unit 2 has a pressurized water reactor manufactured by Mitsubishi Heavy Industries that went into operation in 1986. This reactor is also cooled by sea water. The prism-shaped, octagonal design of the reactor building is unique in the world and clearly stands out from the cylindrical pressurized water reactors in Japan.
The reactor has been idle since May 2011. The operator applied for a restart in November 2015. Whether the plant will ever go back online is questionable: The Japanese nuclear regulator assumes that there is an active crevice under the reactor. According to the regulations on reactor safety that came into force after 2011, an operating ban would have to be issued. The operator contradicts the seismic findings.
Blocks 3 and 4 (discarded)
Units 3 and 4 were planned - each with an output of 1538 MW; they were declared as prototypes for the further developed pressurized water reactor.
In March 2014, units 3 and 4 were no longer listed in the IAEA 's 'Power Reactor Information System' .
Incidents
On October 1, 1974, 13 tons of radioactive water leaked into the sea. 37 workers were easily contaminated.
On March 8, 1981, more than 15 tons of radioactive water spilled into Urazoko Bay. The water had leaked due to a defect and came to the outside through a crack in the floor. The leak was only noticed after three hours. 56 workers were irradiated. The incident became even more explosive because the responsible authorities were only informed 40 days after the accident.
It turned out that there had already been significant problems with repair work:
- On January 10, 1981, 19 people were exposed to radiation of up to 0.55 mSv per day.
- During 3 days of repair work around January 19, 1981, 45 people were exposed to radiation of up to 0.92 mSv per day.
- During 6 days of repair work around January 24, 1981, 76 people were exposed to radiation of up to 1.55 mSv per day.
- For 16 days from March 8, 1981, 138 people were exposed to radiation of up to 1.55 mSv per day. (According to the company, a maximum of 1 mSv per day was permitted.)
The leak of October 1, 1974 was also only discovered during the investigation.
The power plant was then closed for 6 months.
On June 12, 1999, about 90 tons of water flowed from the primary circuit of Tsuruga 2; The cause was a crack due to material fatigue.
On May 2, 2011 it became known that substances had been discovered in the primary circuit of reactor 2, which indicated a defect in the fuel rods. A week later, the operating company announced that the leak had been found and closed.
On December 10, 2012, it was announced that the plant is on an active crevice; Therefore, the operating license will probably be withdrawn and dismantling will be ordered.
On May 22, 2013, the Japanese nuclear regulatory agency confirmed that the nuclear power plant is located on an active crevice.
On March 17, 2015, World Nuclear News reported that Block 1 will not be restarted. April 27, 2015 was given to the IAEA as the official shutdown date.
In November 2015, the operator applied for a safety inspection for Block 2; As of November 2018, the application has not been approved.
Data of the reactor blocks
The Tsuruga nuclear power plant has two shutdown units , two more were planned for a time:
| Reactor block | Reactor type | net power |
gross power |
start of building | Network synchronization |
Commercialization of essential operation |
switching off processing |
|---|---|---|---|---|---|---|---|
| Tsuruga-1 | Boiling water reactor | 340 MW | 357 MW | 11/24/1966 | 11/16/1969 | March 14, 1970 | 04/27/2015 |
| Tsuruga-2 | Pressurized water reactor | 1110 MW | 1160 MW | 11/06/1982 | 06/19/1986 | 02/17/1987 | since 5/2011 in long-term standstill |
See also
Web links
- Plague: Tsuruga (Japan)
- Loan application to the Export-Import Bank of the United States (1977; English; PDF; 8.5 MB)
- ODL data from Tsuruga (JavaScript required)
- Leak in Tsuruga-2 (PDF)
Individual evidence
- ↑ iaea.org
- ↑ WISE Volume 3 No. 3, June / July 1981, p. 14.
- ↑ nuclearfiles.org (English)
- ↑ BBC: Nuclear leak in Japan (English)
- ↑ FAZ.net: Incident in the Tsuruga nuclear power plant
- ↑ Westfälische Rundschau online
- ↑ Nuclear reactor is possibly on an active crevice (welt.de of December 10, 2012), spiegel.de
- ↑ NRA: Tsuruga nuclear plant sits on top of fault. In: The Asahi Shimbun. May 22, 2013, archived from the original on March 4, 2016 ; accessed on August 8, 2016 .
- ↑ world-nuclear-news.org: Three Japanese reactors to be retired
- ↑ www.world-nuclear.org: Nuclear Power in Japan (see table in section 'Status of restart applications and safety reviews')
- ↑ iaea.org
- ↑ Power Reactor Information System of the IAEA : Japan: Nuclear Power Reactors - Alphabetic (English)
