Mihama nuclear power plant

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Mihama nuclear power plant
Aerial view of the nuclear power plant from 1975
Aerial view of the nuclear power plant from 1975
location
Mihama Nuclear Power Plant (Fukui Prefecture)
Mihama nuclear power plant
Coordinates 35 ° 42 '9 "  N , 135 ° 57' 48"  E Coordinates: 35 ° 42 '9 "  N , 135 ° 57' 48"  E
Country: Japan
Data
Owner: Kansai Denryoku
Operator: Kansai Denryoku
Project start: 1967
Commercial operation: Nov 28, 1970

Active reactors (gross):

1 (826 MW)

Decommissioned reactors (gross):

2 (840 MW)
Energy fed in in 2006: 5,556 GWh
Energy fed in since commissioning: 283,968 GWh
Website: The nuclear power plant on the operator's side (Japanese)
Was standing: July 25, 2007
The data source of the respective entries can be found in the documentation .
f1

The Mihama nuclear power plant ( Japanese 美 浜 発 電 所 , Mihama hatsudensho ), west of the town of Mihama in Fukui Prefecture , has three units , the oldest of which has been in operation since 1970.

The operator is the electricity supplier Kansai Denryoku . The outputs of the blocks are 340  MW , 500 MW and 826 MW.

Accidents

In 1974 Unit 1 had to be shut down due to leaks in the steam generator pipes. It turned out to be the primary water problem. The plant was rebuilt and the sodium phosphate was replaced by hydrazine . The block went back into operation on April 19, 1980.

After two minor incidents in Block 2 in 1991 and 2003, a fatal accident occurred on August 9, 2004 at 3:30 p.m. local time with four victims among the employees. According to the police, the workers were hit by a steam jet at 270 degrees. Another seven people were injured. The accident was caused by a leak in the turbine hall .

An investigation revealed significant security deficiencies. The tube had not been checked since it was commissioned. As a result of the accident, Yōsaku Fuji ( 藤 洋 作 , Fuji Yōsaku ) had to resign as president of Kansai Denryoku on March 25, 2005 .

Future of the plant after Fukushima

In March 2011, after a strong earthquake and tsunami, the Fukushima nuclear disaster struck . Since then, the Japanese have been saving massive amounts of electricity in order to be able to shut down as many nuclear reactors as possible as a precaution - there are fears of further quakes and aftershocks.

Blocks 1 and 2

The 340 MW block 1 was supplied by Westinghouse and Mitsubishi, block 2 by Mitsubishi. Mihama Block 1 began regular maintenance on November 24, 2010. Block 2 has not been online since 2012 at the latest.

On March 17, 2015, World Nuclear News reported that units 1 and 2 should not be used again. April 27, 2015 was given to the IAEA as the official shutdown date.

Block 3

Block 3 has been shut down since May 14, 2011.

In March 2015, the operator applied for the unit to be recommissioned and for a 20-year extension, which was approved in October 2016. Mitsubishi's pressurized water block, with its output of 826 MW, is identical to Takahama 1 and 2 , the three blocks are the three oldest in Japan that were scheduled to continue operating after the Fukushima nuclear disaster and were the only ones in Japan to have been in operation in February 2019 was extended.

As of February 5, 2019, the operator expects the block to restart in September 2020.

Data of the reactor blocks

The Mihama nuclear power plant has a total of three blocks :

Reactor block Reactor type net
power 		gross
power 		start of building Network
synchronization 		Commercialization
of essential operation 		switching off
processing
Mihama-1 Pressurized water reactor 320 MW 340 MW 02/01/1967 08/08/1970 11/28/1970 04/27/2015
Mihama-2 Pressurized water reactor 470 MW 500 MW 05/29/1968 04/21/1972 07/25/1972 04/27/2015
Mihama-3 Pressurized water reactor 780 MW 826 MW 08/07/1972 02/19/1976 December 01, 1976 since 5/2011 in long-term standstill

swell

  1. ^ Four dead after an accident in a nuclear power plant , Süddeutsche Zeitung of August 9, 2004
  2. ↑ A people save electricity
  3. ↑ a b https://www.iaea.org/sites/default/files/documents/review-missions/osart_mission_to_mihama_jan_2009_150.pdf
  4. ↑ http://www.iaea.org/PRIS/CountryStatistics/ReactorDetails.aspx?current=386
  5. ↑ http://www.world-nuclear-news.org/RS-Japanese-reactors-to-be-retired-1703157.html .
  6. ↑ http://www.nuklearforum.ch/de/aktuell/e-bulletin/aus-fuer-zwei-weiter-japanische-kernkraftwerkeinheitheiten .
  7. ↑ http://www.world-nuclear-news.org/Articles/Kansai-reschedules-restarts-of-three-reactors
  8. ↑ Power Reactor Information System of the IAEA : "Japan: Nuclear Power Reactors" (English)

See also

Web links

Commons : Mihama Nuclear Power Plant  - Collection of pictures, videos and audio files