核辐射Nuclear Radiation.ppt

Nuclear Radiation Main Idea Discovery of nuclear radition. The effect of nuclear radition. How to prevent nuclear radition. enjoy some key words and several good paragraphs. Discovery You have a lot of radiation types: heat, light, microwave and nuclear. Nuclear radiation can occur in different forms (see 5). The common characteristics of all types nuclear radiation are the fact that it is so energetic that it can destroy molecules. Heat and sunlight are not able to do such damage. Radiation (with the word radiation, we mean nuclear radiation from now on) can destroy molecules, including the molecules in our body. When DNA-molecules in your cells are destroyed you run a risk of getting cancer. Radiation is therefor called carcinogenic: it causes cancer. The specific problem with radiation, compared to other carcinogenic substances (i.e. chemical etc.) is that there is no safe dose below which there is no effect. (see 9) The effect Personal Nearly half the children surveyed in three towns near the stricken Fukushima Daiichi nuclear plant received low-grade internal exposure to radiation during the early days of the accident there, the government said Thursday, fueling concerns about long-term health effects on local residents. 3月，一个女孩在福岛县的筛查中接受核辐射检测扫描。日本政府说，很多儿童受到 低强度内部辐射。 日本政府周四说，受损的福岛第一核电站附近三个城镇中接受调查的儿童中，有近一半在事故初期受到了低剂量的内部辐射。这令公众担心事故可能给当地居民的健康带来长期影响。 A spokesman for the Nuclear and Industrial Safety Agency, the main nuclear regulatory body, said Thursday that the doses the Fukushima children received were below the levels at which health effects become a concern. Children, particularly younger ones, are more susceptible to the effects of radiation, facing higher risks than adult of developing thyroid cancer later in life, experts say. 日本主要核监管机构原子力安全保安院发言人周四说，福岛儿童受到的辐射量低于造成的健康影响值得担忧的水平。专家们说，儿童，特别是年龄较小的儿童，更容易受到辐射影响，他们比成年人有更高的.风险在今后患上甲状腺癌。 Social Dire warnings of radiation spreading from Japans embattledFukushima Daiichi nuclear power plant to deadly effe