Week11-1

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Week11-1

  1. 1. Effects of Radiation Exposure s1180035 Shota Furuya
  2. 2. Contents● Types of Radiations● Effects of Ionizing Radiations● Types of Ionizing Radiations● Productions of Nuclear Explosion● Distinctions of I-131 and Cs-137● Risk of Radiation Exposure● Conclusion
  3. 3. Types of Radiation Non-ionizing Radiation Ionizing Radiation NOT Harmful HarmfulIncluding Including ● Radio waves ● X-rays ● Cellphone waves ● Gamma rays ● Microwaves ● Alpha or Beta particles ● IR or UV rays ● etc. ● etc.
  4. 4. Effects of Ionizing Radiation Nausea, Fatigue, Vomiting Hair Loss, Diarrhea Destruction of intestinal lining, Dehydration Loss of consciousness and Death
  5. 5. Productions of Nuclear Explosion X rays, Gamma rays Radioactive Materials● Occur when it blasts ● Includes I-131, Cs-137,● Give dose of radiation to Sr-90, etc. people immediately ● Form ashes or clouds● Kill people directly or called "fallout" aggravate injuries ● Can collect on skins and clothes ● Can emit radiations and it pierces skins ● Can accumulate in foods, water and drinks
  6. 6. Distinctions of I-131 and Cs-137 Iodine - 137 Cesium - 137● Half-life : 8 days ● Half-life : 30 years● Absorbed in thyroid gland ● Absorbed in soft tissues● Can cause tumors ● Can cause sarcomas● Especially dangerous for children● Can prevent by taking tablets of ordinary iodine More dangerous than I-131
  7. 7. Risk of Radiation ExposureMeasured in sieverts[Sv]500,000 μSv : Nausea, fatigue within hours750,000 μSv : Hair loss within 2 or 3 weeks1,000,000 μSv : Hemorrhage4,000,000 μSv : Sudden Death
  8. 8. Conclusion● Ionizing radiation affects to our body● Its effects are devastatingly serious● Especially dangerous material is Cs-137

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