The reactors af Fukushima Daiichi were built by different companies, but they were all designed by GE.
Construction for the Fukushima Nuclear Power Plant started the 25th of July, 1967. The plant was built by Kajima Construction Corporation, Ltd. This is a Japanese construction company. Founded in 1840. Fukushima I was fully operational in the year 1971.
Yes, thorium was used as a fertile material in nuclear reactors.
The RBMK reactors at Chernobyl were probably the most unsafe reactors ever designed and built. They should never have been built.
Most nuclear reactors, in general, are designed and built to produce usable energy. The energy helps supply public demand for electricity, or provide propulsion for a combat vessel at sea, especially submarines. Some nuclear reactors are built for research only, to learn more about nuclear power and about better ways to utilize it. Nuclear reactors do not emit atmospheric contaminants like other energy-making processes do. They are not like combustion engines, and require no oxygen to burn for their function. Breeder reactors are a different story indeed. They do produce usable energy, but in too many cases their design purpose is to "breed" more fissionable material during the reaction process.
Mostly at present they are AGR's that is Advanced Gascooled Reactors, using carbon dioxide coolant, graphite moderator, and slightly enriched fuel clad in stainless steel sheaths. There is one PWR running and all new ones built will be PWR.
There were six reactors at Fukushima Daiichi. At the time of the earthquake, three of these, reactors 1, 2, and 3, were operating. Reactor 4 was shut down for refueling, and reactors 5 and 6 were in cold shutdown.
Fukushima Daiichi nuclear disaster happened on 2011-03-11.
The tsunami that hit Japan wiped out the cooling systems for the reactors at the Fukushima Daiichi power plant. The reactors are currently overheating and releasing dangerous amounts of radiation into the atmosphere
International reaction to the Fukushima Daiichi nuclear disaster happened in 2011.
Japanese reaction to Fukushima Daiichi nuclear disaster happened in 2011.
Yes. That's how the diesel generators were damaged at Fukushima Daiichi, leading to the current crises there. Note that the reactors themselves were not touched by the tsunami because of the containment structures in place.
Dai-ichi, or Daiichi, means first. There are two Fukushima power plants, both of which are run by the Tokyo Electric Power Company. The names are Fukushima Daiichi, meaning the first Fukushima plant, and Fukushima Daini, meaning the second plant.
There is a link below to a timeline for the accident at Fukushima Daiichi.
Fukushima Daiichi.
The Fukushima Daiichi nuclear disaster took place on March 11, 2011, in Okuma, Fukushima, Japan.
Before the Fukushima Daiichi Disaster, there were 54 operational nuclear reactors in Japan. Three of those melted down, and one had problems that rendered it inoperable. The government has decided the other two reactors at Fukushima Daiichi cannot be restarted. Also, as other reactors have been shut down for maintenance or refueling, they have not been restarted, with the result that now, in early December 2011, only eight Japanese reactors remain in operation.
Fukushima Daiichi uses Uranium-235, at a slightly enriched ratio of about 5%.