July 18 july_24_possible_health_effects_of_nu

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July 18 july_24_possible_health_effects_of_nu

  1. 1. Possible health effects of nuclear crisis July 18 - July 24 Article #1
  2. 2. IntroductionFukushima NO.1 power plant dont avert a meltdown.unclearauthorities have reported that spikes of radiation have escapedfrom the facility at levels that can be dangerous to humanhealth.so many people within 20 km of the plant escape thearea. we look at the potential radiation effect human health.
  3. 3. what are kind of radiation damaging for people?radiation have two types of radiation , non-ionizing and ionizingNon-ionizing radiation includes infrared radiation,radio waves,cellphone and the radiation we use to cook food in amicrowave.non-ionizing radiation dont have hazardous effect .But ionizing is much more dangerous ionizing radiation doesbreak chemical bonds and thus does cause cancer.
  4. 4. How effect when human is exposed toionizing radiation.The damaging depends on how long you are exposed.Theinitial symptoms are identical to those suffered by a personundergoing radiation therapy for cancer. the first signs includenausea and fatigue, then vomiting. After that comes hair comeshair loss and diarrhea. And heavier exposure is generallydestruction of the intestinal lining and worse diarrhea anddehydration, then central nervous system damage.After thatcomes loss of consciousness and death.
  5. 5. How does radiation from nuclear plantscompare with a nuclear bomb? A nuclear explosion produces two types of radiation that havelethal effect.That blast itself produces X - rays and gamma raysthat irradiate anyone near the site, usually with a lethal or near-lethal dose of radiation.the radiation kill people directly oraggravates other injuries suffered in the blast.clouds of radioactive ash that includes cesium -137,iodine-131,radioactive strontium and a host of other long lived byproductsof the explosion.This material can collect on skin and clothing,where it can emit radiation that pierces the skim.Moreimportant, it can accumulate in food, milk,water and otherproducts that are ingested. nuclear plant are byproducts of thefission of uranium in the fuel roods
  6. 6. What makes cesium -137 and iodine-131 dangerous?iodine-131 is absorbed preferentially in the thyroid gland,I has ahalf-life of eight days and is most dangerous to childrenbecause it damages rapidly dividing cells.Cesium -137 has a half life of30 years. it is absorbed into softtissues, causing sarcomas.it contaminates food, water and milkand gets into the body when those things are ingested.
  7. 7. How much exposure is enough to makesomeone sick?The biological risk of exposure to radiation is measured insieverts.1 An exposure of 500,000 microsieverts can lead to nauseaand fatigue within hours.2 A does of 750,000 microsieverts cause hair loss within two orthree weeks,3 A dose of 1 million microsieverts will cause hemorrhage.4 Death usually at a dose of 4million microsieverts.
  8. 8. Summarythe radiation effect human health but we should understandhow to effect of nuclear radiation so we dont worry about toonervous.

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