- Nuclear Power
- Nuclear Safety
- List of NPP
- Nuclear Accident
Posted by Energetic
|Unit||Type||First Criticality||Electric Power|
|Fukushima I - 1||BWR||March 26, 1971||460 MW|
|Fukushima I - 2||BWR||July 18, 1974||784 MW|
|Fukushima I - 3||BWR||March 27, 1976||784 MW|
|Fukushima I - 4||BWR||October 12, 1978||784 MW|
|Fukushima I - 5||BWR||April 18, 1978||784 MW|
|Fukushima I - 6||BWR||October 24, 1979||1100 MW|
|Fukushima I - 7 (planned)||ABWR||October, 2013||1380 MW|
|Fukushima I - 8 (planned)||ABWR||October, 2014||1380 MW|
|Fukushima I Nuclear Power Plant|
The Fukushima 1 NPP
|Operator||Tokyo Electric Power Company|
|Start of commercial operation||March 26, 1971|
|Reactors active||6 (4,696 MW)|
|Reactors planned||2 (2,760 MW)|
|Total power generation in 2006||25,806 GW·h|
|Average annual generation (last 5 yrs)||21,436 GW·h|
|Net generation||781,594 GW·h|
The company also said monitoring data suggested the air pressure level has also soared inside the container of the reactor.
Under Japanese law, a nuclear emergency must be declared if there is a release of radiation, if there is a dangerous level of water in the reactor, or if the cooling mechanisms fail. Japan declared a state of atomic power emergency instructing around 3,000 residents near a reactor in Fukushima Prefecture to evacuate. The evacuation advisory was issued for people living within a 3-kilometer radius of the plant, affecting approximately 5800 residents living near the power plant, while those living within a 10 kilometers radius were requested to stay home.
At 16:30 JST (7:30 GMT) on March 12, there was an explosion at the Fukushima I plant.
Early on March 13, an official of the Japan Nuclear and Industrial Safety Agency told a news conference that the emergency cooling system of Unit 3 had failed, spurring an urgent search for a means to supply cooling water to the reactor vessel in order to prevent a meltdown of its reactor core.
At 7:30 JST, TEPCO prepared to release radioactive steam, indicating that "the amount of radiation to be released would be small and not of a level that would affect human health".
At 12:33 JST on March 13, it was reported that Secretary Edano said "it was 'highly possible' a partial meltdown was underway" in Unit 3. The six other active Fukushima 1 and 2 reactors would be venting radioactive gas to reduce pressure. The Post blamed the hydrogen explosion in Unit 1 on the lack of electrical power to the plant, which disabled a safety device that ignites hydrogen gas before it builds to a dangerous level.
Radiation at the Fukushima No. 1 plant has risen to 882 micro sievert, compared with the legal limit of 500, said Tokyo Electric Power Co.(TEPOC), operator and owner of the Fukushima plants, on Sunday.
At an emergency press conference, Chief Cabinet Secretary Yukio Edano said that the radiation has briefly jumped to 1,204 micro sievert at the plant.
He said that fresh water has been injected into No. 3 reactor of the plant and radiation at the reactor was small and under control.
Earlier in the day, the TEPOC reported the reactor lost its ability to cool the reactor core.
It was the sixth reactor that lost the function after No. 1 and No. 2 reactors at the No. 1 plant and No.1, No.2 and No.4 at the No.2 plant had suffered the same trouble.