Shika Nuclear Power Plant
CountryJapan
Coordinates37°03′40″N 136°43′35″E / 37.06111°N 136.72639°E / 37.06111; 136.72639
StatusOut of service
Construction beganJuly 1, 1989 (1989-07-01)
Commission dateJuly 30, 1993 (1993-07-30)
Operator(s)Hokuriku Electric Power Company
Nuclear power station
Reactor type1 x BWR
1 x ABWR
Cooling sourceSea of Japan
Power generation
Units operational1 x 540 MW
1 x 1206 MW
Nameplate capacity1746 MW
Capacity factor0
Annual net output0 GW·h
External links
Websitewww.rikuden.co.jp/atomic/
CommonsRelated media on Commons

The Shika Nuclear Power Plant (志賀原子力発電所, Shika genshiryoku hatsudensho, Shika NPP) is a nuclear power plant located in the town of Shika, Ishikawa, Japan. It is owned and operated by the Hokuriku Electric Power Company. It is on a site that is 1.6 km2 (395 acres).[1] The plant is currently not producing electricity in the wake of the 2011 Fukushima Daiichi nuclear disaster.

Reactors on site

Unit Type Commission date Electric Power Thermal Power Maker
Shika – 1 BWR July 30, 1993 540 MW 1,593 MW Hitachi
Shika – 2 ABWR March 15, 2006 1,358 MW 3,926 MW Hitachi

Accidents

1999 criticality event

On June 18, 1999 during an inspection, an emergency control rod insertion was to be performed on Unit 1. One rod was to be inserted into the reactor, however, due to improper following of the procedure, instead of one rod inserting, 3 rods withdrew. For the next 15 minutes, the reactor was in a critical state (producing heat). This event was not revealed until March 15, 2007, since it was covered up in the records. Unit 1 remained shut down, pending judicial and bureaucratic evaluation. In April 2007 the event had been provisionally categorized as an INES level-2 incident.[2]

A lower court had ordered the entire plant to be shut down, but that decision was later overturned by Nagoya's high court. The utility put in a request to the Ishikawa prefectural government and the town of Shika for the restart of unit 1.[3] The unit returned to power on May 11, 2009 and resumed commercial operation on May 13.[4]

Temporary shut-down

Following the 2011 Fukushima nuclear accident, the plant was temporarily shut down to make changes in order to comply with new regulatory requirements.[5]

Construction of a reinforced concrete wall that should shield the reactors against a possible tsunami was started in October 2011. The wall was designed 4 meters high and 700 meters long, 11 meters above sea level. This was done to comply with extra governmental instructions ordered after the Fukushima accident. Next to this a new drainage gate was to be installed to minimize damage to plant facilities in case seawater would be able to climb over the wall and would submerge the plant. Other emergency safety measures included the installing of an extra pump to cool the reactors with seawater and an extra power source to operate a valve for venting steam out of reactors. Construction was expected to be completed by the end of March 2013.[6]

As of 2021, the plant is still waiting for clearance to restart.[5]

See also

References

  1. ↑ Hokuriku Power. Shika NPP information sheet.
  2. ↑ "Shika 1 criticality rated at INES 2". world-nuclear-news.org. 2007-04-23. Retrieved 2017-03-06.
  3. ↑ Reuters. Japan's Hokuriku seeks local OK for nuclear restart. March 18, 2009.
  4. ↑ NucNet. Japan’s Shika-1 Returns To Service Archived 2011-10-04 at the Wayback Machine. May 22, 2009.
  5. 1 2 "Shika 2, Japan". www.world-nuclear.org. Retrieved 5 January 2024.
  6. ↑ JAIF (5 October 2011)Earthquake-report 226: Construction of seawall begins at nuclear plant Archived 2011-10-28 at the Wayback Machine
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