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    Report1 Report1 Presentation Transcript

    • Does Nuclear Cricis effects health? S1180194 Masato Harada
    • Fukushima I nuclear accidentsFukushima I nuclear accidents is severe nuclear accide nt. Large radionuclide was released. As a result, 170,000 people within 12 miles of the plant have to escape place of refuge. And, at least 200 people hav e been exposed to radiation. Are they all right?How Does Nuclear Cricis effects health?
    • Nocuous of radiation・ There are two types of radiation(non-ionizing andionizing)・ Non-ionizing is safe. For example, infrared radiation,radio wave, cellphone radiation and microwave areNon-ionizing.・ Ionizing is harmful. It breaks chemical bonds andcauses cancer.For example, X-rays, gamma rays and alphaor beta rays are Ionizing. Generally speaking ,it meansradiation.
    • Influence of Radiation・ Influence of person caused by radioation depends on how long you are exposed.・ The initial symptoms are same as adverse by radiation tratment. For example, vomiting, diarrhea and hair loss deserve it.・ Severe symptoms are destruction of the intestinal lining  and worse diarrhea and dehydration, then central nervous  system damage. In the worst case, it causes death.
    • Comparison between the accident and nuclear bomb・ The accident is different from explosion of nuclear bomb.・ Explosion of nuclear bomb produce X-rays and gamma rays They make mushroom cloud which includes cesium-137, iodine-131, radioactive strontium and a host of other long-lived byproducts of the explosion and sheds radioactive subatance kill many people.・ Fukushima does not release X-rays and gamma rays. Most of radioactive subatance which is radiocesium and radioiodine, which is generated in a process of atomic power generation. Of course, they are harmful to human being, too.
    • Iodine-131 and Cesium-137・ Iodine-131 and Cesium-137 are released by nuclear accident.・ If people absorb Iodine-131 , the possibility that people might contract cancer of the thyroid will rise. I In fact, many people contractd it and die in Chernobyl. It is confirmed that it is released in Fukushima.But, Iodine tablet can restrain the symptom.・ Cesium-137 is danger like Iodine-131. It has a half-life of 30 years. So,Chernobyl became land which is not suitable for living. It is also confirmed that it is released in Fukushima.
    • Damage by radiation・ The biological risk of exposure to radiation is measured in sieverts.・ Dose limit of ordinary person is 1 millisieverts a year and one of radiation worker is 50 millisieverts a year.・ A dose of 2000 millisieverts causes hair loss and bleeding and kills 5 percent people. One from 3000 to 5000 millisieverts kill 50 percent people and cause cataract and erythema. One of 7000 or more kill 99 percent people.
    • Matters to be attended to Fukushima I nuclear accidents is the worst nuclear accident.A lot of people are very concerned about safty of nuclearpower plant and groundless rumors are abroad. I think thatpeople should take care of following heads.・ Take care of rumors.・ Don`t do overreaction.・ Get right knowledge about radioactivity.・ Understand that different experts may have different opinions about damage by radioactivity.➲