23 Haziran 2012 Cumartesi

Radiation - a good servant but a bad master

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Final dimensions of the accident in Japanese nuclear power plants are still not in sight. Appears clear, however, clear. The debate over the future of nuclear power is back on the agenda.

Nuclear disasters in Japan will change the world. Will permanently change it. It clearly showed us how dangerous and unpredictable at the end of atomic energy. Yes, we can control the splitting of atoms. Yes, we know how atoms behave and what we do to help us produce large amounts of energy. But we now know that the experts, nuclear physicists and politicians frightening helplessness when a nuclear power plant falls out of balance. Prevailing weakness and hope that it will melt the reactor core itself may cease.

Who says that Japan knows where tectonic "a barrel of gunpowder" sitting in Germany and never be so strong earthquake, this stuff makes you damn simple. What about planes that can drop to a nuclear power plant, which is to terrorist attacks and the multiple human and technical error?

The danger is not only a potential disaster - but the nuclear waste. We do not know where the management team that might someday be a problem. Despite an intensive search for the location, anywhere in the world at the moment there is not the only one landfill for eternity.


  The risk of future

If we want this risk in the future? Although we have alternatives. Solar energy, wind energy and so on? Renewable energy sources that make us independent of oil, which are benign and permanent, are not problematic for those who will come to earth after us. In this energy finally has much to invest. They are not environmentally dream. No. They are a symbol of clean, sustainable, technically modern society.


Atomic energy is itself overtaken. It is dirty, dangerous and wasting resources. Slowly disappears and the uranium fuel for nuclear power plants. Uranus has a maximum of another 50-60 years, experts say. Is this sustainable? Such as claiming only the atomic industry lobbyists and energy corporations, who make a lot of money by splitting the atom - and who have a strong influence on politicians. A policy is, hopefully, a disaster in Japan awake.

Now has to prove courage. I invest in energy technology and the future.


History of use of nuclear energy is full of minor and major incidents. Some of them were particularly dramatic. We present a chronological overview of the major accidents that have partly changed the view on nuclear energy.


  April 1986th

The most difficult disaster in Earth's history occurred in Chernobyl in Ukraine, then part of the Soviet Union. The graphite reactor explosion at the site killed 32 people. Thousands of people died as a result of failures over the years and decades that followed.

Around 120,000 people had to be relocated from the irradiated area. Winds and clouds of radioactive material is then "transported" to the area of Western Europe.

A comprehensive and shocking article about the Chernobyl accident can be viewed HERE.

  March 1979th

The largest nuclear accident in the United States occurred at Three Mile Island nuclear power in Harrisburg, Pennsylvania federal government. Radioactive "cloud" is then registered and a few hundred kilometers from the accident site.

More than 200,000 people had to flee their homes.

  October 1957th 

In a nuclear power plant in Windscale in the UK once the fire broke out in a reactor that was used for plutonium production. Radioactive gases are "poisoned" the large area of several hundred square kilometers.

From the resulting accident died at least 39 people.

   September 1957th

The world is one of the biggest nuclear disaster learned only a few years after it actually occurred. In Soviet plutonium plant Majak exploded an underground tank with liquid, radioactive waste management. At least 1,000 people were killed and more than 10,000 came in contact with radioactive material.

To date, no reliable figures on the extent of the accident. For half a century has been irradiated in a large area of about 12,000 square kilometers.

Only 1976th the world learned of this accident, the secret was betrayed a Soviet scientist who had emigrated. Moscow has yet 1990th officially recognized by the general average.


  RADIATION EFFECTS





On Saturday afternoon, the radiation level was 1015 milisiverta (mSv). By comparison, the radiation from the vicinity of the average person receives 2 mSv per year.

What is the dose that is received during a medical examination?

Whole body CT received a 10 milisiverta, a lung X-ray 0.1 milisivert. Rengenolozi and operators of nuclear power plants should receive about 100 milisiverta over five years, or 20 milisiverta in one year of that period. Such persons are under regular medical control.

What is the lethal dose of radiation?

- Around 6000 mSv. These larger doses are lethal, a radiation dose greater than 2000 mSv causing severe radiation sickness.

What are the immediate effects of radiation on human health?

Exposure to moderate doses of radiation can be removed after several hours lead to nausea, vomiting, diarrhea, headache and fever. Higher doses of radiation damage internal organs and ultimately may be deadly.

Fission products which are particularly dangerous to your health?

Radioactive iodine, which is embedded in the thyroid gland and radioactive strontium that is built into the bones. The main danger threatening the organism if the radioactive products from entering the body, either through the airway, either through the digestive system.

What are the parts of the body most susceptible to damage by radiation?

The most sensitive to radioactive rays are the cells of the stomach and intestines and parts of the bone marrow where blood cells are created.

What are the long-term effects of radiation on humans?

Radiation leads to genetic mutations and the biggest risk in the longer term is cancer. Among the later effects of radiation are degenerative changes in the lungs, kidney damage, vision problems, etc.

Are children exposed to greater risk from radiation?

Potentially, because they grow and develop in line with more cells in their body is divided. Therefore, it is more likely to disrupt the cycle of separation and that comes to cancer. After Chernobyl, the World Health Organization has recorded a dramatic increase in thyroid cancer among children in the area. 
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