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On March 11, 2011, an earthquake of magnitude 9 unexpected happened off the coast of Japan. The earthquake releases enough energy to every light bulb in Los Angeles for one year easy and takes about 6 minutes. According to data published by the U.S. Geological Survey, the total destructive power of earthquakes large enough and similar earthquakes in Japan is not the case for the last 1000 years. More interesting, though the earth’s axis shifted by 25 meters and as a result of changes in the mass distribution of the Earth, the days are getting shorter by 1.8 microseconds. Combined destructive power of earthquakes and tsunamis is 1 million times greater than the overall market destructive power of atomic bombs on Hiroshima and Nagasaki in World War II to give. Although Japan has a very thorough, and although the most earthquake-detection and emergency management systems in the world, bringing them cope with the tragedy of it worked. The enormity of the tragedy that more than 18,000 deceased people slain and 15,000 people are still missing.
One of the first installations when an early warning system at a nuclear power plant in Fukushima was closed. Discovered after an earthquake was about 49 seconds for the actual event, alarm systems, emergency power plant in Fukushima Scram hit rod in place. These emergency measures to fission, in Fukushima reactor core occurs in the order of seconds to stop. Basically, Fukushima Power Plant consists of 6 nuclear reactor cores, each with a design, the light worked with General Electric boiling water under pressure into the core itself. Since fission occurs, the generated heat used to boil water and stored under high pressure. This steam then flows through a turbine, creating electricity that the world we need. Basically, although the fission in the core is what drives the whole process, we can think of the circulation of cooling water as the major part of the production of nuclear energy. It is important that takes place during the generate heat, the air is continuously circulated, causing the reactor core temperature to remain below the critical temperature.
If the reactor is the operating system stops the production of fissile material in the reactor core continues to heat through heat and isotope products. If the fission reaction stops, the decay heat is also used in about 10 days at a reasonable level to reduce disappear. It is therefore important that the air circulation around the core for 10 days, although the reaction was stopped.
Thus, the power plant in Fukushima incident was actually due to the fact that the circulation of the coolant is stopped due to the earthquake. The main power supply current to the pump went offline and the effect stopping the circulation of cooling water. Since the reactor was stopped, not even central to generate electricity. GE reactor is designed to create a second backup system with a diesel pump, which kept the circulation. However, when the tsunami came and reached Fukushima power plant, a secondary system also gone offline because the pump is submerged. Occurs in the third pump system, but failed after a short time because of the tsunami disaster. Unfortunately, due to the earthquake and tsunami, all roads blocked and will not fire emergency vehicles and bring much needed water, and portable generators that can power the circulation of cooling water.
Therefore building up steam pressure is too strong and the explosion of steam, some steam to stop in the atmosphere. In essence, the fan arranged to stop a serious incident. Unfortunately, during the aeration process, oxygen from outside into the room and mixed in possession due to high temperatures, water is electrolyzed into hydrogen nucleus. Therefore causes a high pressure and high temperature to ignite the hydrogen, causing the explosion incident, damage to the outer chamber.
Fortunately for the steel dome that surrounds the reactor core is intact and the main incidents are avoided. For example, the chief engineer of the plant, the sequence is probably the reactor core with sea water and circulates in a natural way, flood, and with the help of a portable generator arrived. Flooding of the reactor core is the right solution so that the sea water cooling the reactor to start again from scratch. Unfortunately, the pelvic floor seepage from the reactor core, some fissile material in the sea in cinemas. There are several over-all cooling systems go offline, this is something that is unimaginable for the reactor designer. Fukushima incident is a combination of natural disasters with a number of human errors is activated, such as sea water can be pumped before stopping on the incident immediately. Of course this event will assist in the reactor operators, allowing security procedures will be stricter and better designed and implemented. Within the design of new, inherently safe reactors, the human factor is eliminated and the world we can generate enough electricity by nuclear power.

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