学术英语 review

As worries grow over radiation leaks at Fukushima ,is it possible to gauge the immediate and lasting effects of radiation exposure ?Here’s the science behind radiation sickness and other threats..The principal risks associated with nuclear power arise from health effects of radiation. This deep efffect can deep human dody even tough biological cells and thereby initiate cancer .If they strike sex cells ,they can cause genetic diseases in progeny.(Bernard L.Cohen)Besides,Susan Blumenthal said that radiation is energy like waves or particles transmitted in the form.Remove electrons form other atoms need ionizing radiation like waves or particles prove enough energy, thus cells was damage by creating chemically reactive ions.(Susan Blumenthal).Nina Bai said a very high single does of radiation acquire within minutes can be more harmful than the dosage accumlated over time .According to the World Nuclera Association ,a single one-sievert does is likely to cause temporary radiation sickness and lower white blood cell count, but is not fatal. One five=sievert does would likely kill half of those exposed within a month. At 10siverts,death occurs within a few weeks. （Nina Bai,2010）.In fact nuclear radiation cause is not great,but also keep a long time.some experts say that the process would take some 80 to 100 years to deem those radioactive elements harmless(Amber Cornelio).As a matter of fact,we depending on the duration and strength of the exposure to divide a harmful does of radiation.These are include

iodine-131,cesium-239^2,and strontium-90^3,every decays have different rate and different harm for the body(Susan Blumenthal).In that way,what should we do to void and treat nuclear radiation?“as low as reasonable achievable a”.Readiation exposure limits are conserwatively set well below the levels known to induce radiation sickness or causing long-term health effects.(Nina Bai)