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On March 11, 2011, a massive earthquake and tsunami which caused extensive and irreparable damaged to the nuclear reactors and spend fuel pools at theFukushima Nuclear Power Plant in Japan,which releasing harmful radiation into the air.The earthquake caused a 14m high tsunami disabled all the power plant generator unit 1-6.Since then, our scientist havereported government to the officials, hospitality, medical professionals, public and numerous countriesaround the world about the impact of these radiation release which harmful to human. This caused an extensive of radiation material spread in the atmosphere resulting in poison of gas and a hydrogen explosion which harmful to human. The government raised the accident assessment to Level 7, which level 7 is the most high level, the worst rating on an international disaster scale, acknowledging to the human and environmental consequences for a long lasting period. Operating reactors shut down eventually, which control all the nuclear plant inside the factory. When the cooling system was inoperable, a pressure valve opened manually to reduce the pressure in the reactor which contained radiation. After that, hydrogen explosions damaged the factory. Eventually, a large amount of harmful radiation was released into the air by the time.
3.The Fukushima nuclear disaster was a "man-made"
Most people know about the disaster at the Fukushima Daiichi nuclear plan on Japan's east coast believe caused by a natural disaster which believed by all the human. A big earthquake caused a tsunami that swept the Fukushima factory in March 2011, heavily damaging three reactors still in the process which released the harmful radiation to the air and in the ocean. Unfortunately, a new report from Japan's government says the damage to the nuclear reactors wascaused by human error and irresponsible . The "man-made" failure which led to such accident at Fukushima were the result of shutdowns between operations and the nuclear operator, Tokyo Electric Power Company (TEPCO), allowed the company to avoid factory safety measures. Japan 2011 tsunami were natural disasters but at the Fukushima Nuclear Power Plant was man-made failed among Japan nuclear power plant industry, the government of Japan, and citizen, including the reluctance to asking the authority. The Fukushima Nuclear disaster was the caused of argument and irresponsible between the government of Japan, the company.
4. The Industrial process and operation of nuclear plant
At first, to convert the uranium which is nuclear fission to the energy of electrical, the nuclear reactor operators able to control the energy produced by the uranium and to allow heat water into steam. The pellets which make in the longÂ rods so that the long rods are able to collected together intoÂ bundles. The bundles are immerged in the water inside the pressure vessel. To prevent from overheating,Â control rods made by the material that absorbs the neutrons are put into the uranium bundle using a mechanical that can lower them. To lowering the control rods that allow operators to control the mechanism of the nuclear reaction.Â Â Meanwhile, the operator of the nuclear reactors needs the uranium to give more heat energy on it, the control rods are will absorb less neutrons . To reduce heat of the nuclear reactor, they are decrease into the uranium bundle. The rods can be decreased completely into the uranium bundle to shut down the reactor . The generators heats the water and turns to steam energy. The steam drives a turbine, which rotate the generator to produce power. The steam which came from the reactor goes through a heat exchanger to convert the water to steam, which operate the turbine.
At the Unit 1 that have few that are reactor cooling responsibly include the two trains of core spray (CS) system, two types of isolation condenser (IS) system, at the high pressure cooling injection (HPCI) system, one train of the reactor shutdown cooling (SHC) system and two trains ofcontainment cooling system (CCS) .The core spray (CS) system normally used when the nuclear reactor core is exposed to Loss-of-Coolant-Accident. To overcome this overheating of fuel that may damage to the fuel rod cladding, the CS system cools the reactor core by adding water on the fuel from nozzles on the nuclear reactor core. Adding water used inthis reactors is taken from the pressure suppression chamber (S/C). The isolation condenser (IC) is used when the main condenser is rendered inoperable due to fracture of the main steaming pipe. For example.
Units 2 through 5
The middle nuclear reactors cooling capability at Units 2 through 5 including, for Unit 1from the above, two trains of CS system and other is one train of HPCI system. Meanwhile, each reactor unit has one train of reactor core isolation cooling (RCIC) system and two trains of heat removal (RHR) system Thenuclear reactor core isolation cooling (RCIC) system is used after the malfunctionin water cooling systems. The RCCI system eventually to the cooling of the reactor core running on a turbine-driven pump system.
The last reactor cooling system at Unit 6 including one train of RCIC system and three trains of RHR system which shown above.In extra, Unit 6 has nuclear high pressure core spray (HPCS) system and one train of low pressure core spray (LPCS) system. The high pressure core sputting (HPCS) system is used after the Loss-of-Coolant-Accident due to piping malfunction. The HPCS system cooling down the nuclear reactor core by adding water onto the fuel.The water which common used in this progress taken from the huge storage tank or from the S/C. After that , the low pressure core spray (LPCS) system is used when theLoss-of-Coolant-Accident has occupied due to piping malfunction.
6. Impact of Fukushima nuclear disaster on society
The common impact of Fukushima to Japan which is the economy crisis. Meanwhile the physical destruction mainly occurred from Japan's industrial site, most the industrial have been closed due to tsunami and earthquake because the earthquake which spoiled the underground electrical cable in the ground.In order to save the Japan crisis, the Bank of Japan has already pumped about $25billion into the Japanese economy to build up the economy.Meanwhile, the tsunami which cost Japan lost estimated at $200 billion. The Japan's government which already high depth levels, financial markets used to build up all the reconstruction site which spending at high cost level. The great news or bad news is that Japan has not able for Asian growth at some time.
7. Impact of Fukushima nuclear disaster to ecology
There are many stated the report on the human impact on this , there are fewer reports on the possible impacts that on the marine life, not only off the coast of Japan, but around the world. Japan has already closed all the fishing industry and exports most the fish around the world, because due to FDA conducts tests for radiation levels on fish products which have the high level of radiation.The ocean been thinking by humans throughout history as this unlimited sink, a volume of water that should not possibly been affected by the waste of our species. We slowly estimated the beginning to investigate the error in this line of thinking. The ocean is indeed a large volume of water, and the pollutions of water that find their way into it are often diluted to the point that they are no longer detectable. The amount of waste in the water which takes a long time to eliminated.
C:\Users\lewis\Desktop\japan seafood radiation.jpg
see photo above of a chef screening imported seafood for radioactivity
Chernobyl barn swallows (Hirundorustica) normal (left) and with radiation-caused albino spots (right)
Image: Courtesy of Timothy Mousseau
8. Impact of Fukushima nuclear disaster to sociology
The disaster of the earthquake in Japan and Fukushima nuclear station shutdown in March 2011, the reporters focus on the safety of nuclear power plant. At the time ,international media is the social dimension of the disaster: it bring to Japan communities. For someone who live and had familywhich live in Japan, a good question remains how the disaster affected these communities. The disaster has highlighted and compounded such underlying falling of birth rates, the separation of the family unit, and the grow of Japan communities. During the five years before the nuclear disaster, the birth rates had been falling in Japan.
Now day all the people mention about radiation levels in Japan, safety of water and the food have left many young couples are not ready to use in the high risky task of increased children in a dangerous levels..
9.Impact of Fukushima nuclear disaster to health
Radiation energy can be electromagnetic ,the strong wave which is gamma rays can harmful to human body health. Radiation which divided into non-ionizing (microwaves , infrared ,gamma rays ,TV, radio wave)and these are ionized . Ionizing radiation able to knock electrons off of atoms will changing the reactions of the properties . This process is referred to ionization so the name which named is as Ionization. Ionizing radiation which effects the health of human body because it can change chemicals reactions in the human body.When radiation enters a human body, the radiation which deposit inside the body will damage the Human DNA or cause many the atoms in tissues that cause damage to chemical bonds changing and break the tissues in the human body. The process of how radiation damage the tissues its depends the type of radiation are different. Meanwhile, the amount of radiation which cause damage to the human tissue depends on the total level to the body, the type of radiation, and the amount of time to absorbed the radiation.
10 .The actions taken by Tokyo Electric Power Company (TEPCO)
At the local time 14:46 on March 11, 2011 when the earthquake hit, tsunami began, Units 1 to 3 of the Fukushima Dai-ichi NPS were in progressing and Units 4 to 6 were undergoing the periodic inspections. The main control room for adjacent units; one for Units 1 and 2, one for Units 3 and 4, and one for Units 5 and 6.In the earthquake, five teams had been working long shifts at each main control room inside the nuclear plant. Each shift team had 11 members comprising of one shift supervisor, one assistant shift supervisor, two senior operators, one assistant senior operator, two main equipment shift operators, and four auxiliary equipment shift operators .After the earthquake, the shift teams start working at the main control rooms played a big role in controlling the nuclear reactors.
After the earthquake, the shift supervisor tried to solved the operating status of Units 1 and 2 from approximately 14:46 to 14:47 on March 11, 2011 and eventually checked that red warning lights were on through the warning signs above the control panels in the main control room for the two reactors (hereinafter called "Units 1 & 2 main control room"). He confirmed that all control rods had been fully inserted and the two reactors were automatically scrammed. The shock of the earthquake caused the earthquake and give the fire alarms to sound in the Units 1 &2 main control room at a fast responded .
11. Regulatory on Fukushisma
The safety of nuclear energy in Japan cannot be ensured unless the regulators go through an essential transformation process. The entire organization needs to be transformed, not as a formality but in a substantial way. Japan's regulators need to shed the insular attitude of ignoring international safety standards and transform themselves into a globally trusted entity. The regulators did not monitor or supervise nuclear safety. The lack of expertise resulted in the postponement of the implementation of relevant regulations.Regulators avoided their direct responsibilities by letting operators apply regulations on a voluntary basis. Their independence from the political arena, the ministries promoting nuclear energy, and the operators was a mockery.The regulators also had a negative attitude toward the importation of new advances in knowledge and technology from overseas. If NISA had passed on to TEPCO measures that were included in the B.5.b subsection of the U.S. security order that followed the 9/11 terrorist action, and if TEPCO had put the measures in place, the accident may have been preventable.
12. Efforts to Improve Safety and Quality
The Nuclear Power Division has been stated the improvement of safety and management in daily work of administrating and managing the nuclear power stations in the past. Meanwhile, with the past nuclear scandal in 2002, TEPCO returned to its initial recognition that take the understanding and confidence of the general public and the community and in order to manage the safety assuranceactivities at all the nuclear power stations, the Quality Management System (QMS) wasdeveloped.Under QMS, the PDCA cycle has the responsible to improve safety and quality by carry out the process required to achieve the quality policy established by
top management (President) and the roles of each organization in the rules and regulations..
The safety management must be operated and take under the leadership of factory management and the steady buildup of specific activities by thepeoples involved in nuclear power stations, many efforts have been taken. Initial, since the nuclear scandalhappen,actions have been made to cultivate a culture oflearning humbly (learning from nuclear power plant mistakes, prevent the disaster again) and ensure transparency information immediately, etc. for cultivation and safety culture..
After the investigation has conclude that was A "manmade" disaster. The nuclear disaster accident was the result of argument between the government, the regulators and TEPCO .The accidents was clearly man-made that we investigated ,the disaster due to irresponsible on employees to shut down the nuclear reactor. We should planning and working on the correct way to prevent this man -made disaster again.