Possible Health Effects of Nuclear Crisis s1180054, Yoshinobu Kimezawa
Introduction Following Fukushima Daiichi nuclear powerplant accident, a large amount of radiation wasreleased. Here is a opinion about radiationexposures and effects on human health on theaccident.
Is All Radiation Harmful?There are two types of radiation: non-ionizing andionizing.Non-ionizing radiation: If it is very intense, itcan heat up tissues. Otherwise, it does not havesignificant effects. It is not believed to causecancer.Ionizing radiation: It is much more dangerousbecause it does break chemical bonds and thusdoes cause cancer.
What Happens When Someone isExposed to Ionizing Radiation?First stage(Slight exposure): Nausea andfatigue, then vomiting. After that comes hair lossand diarrheaSecond stage(Heavy exposure): Destruction ofthe intestinal lining and worse diarrhea anddehydration, then central nervous system damage.After that comes loss of consciousness and,inevitably, death.
Radiation Released from Nuclear Plantsand One from Nuclear BombNuclear bomb: It produces two types of radiationthat have lethal effects. The blast itself producesX-rays and gamma rays.Nuclear plant: Fukushima is not emitting gammaor X-irradiation. Most of the radioactivity is in theform of radiocesium and radioiodine, which arebyproducts of the fission of uranium in the fuelrods.
How much Exposure is Enough to MakeSomeone Sick?The biological risk of exposure to radiation ismeasured in sieverts(Sv).500,000 μSv/h: Nausea and fatigue within hours.750,000 μSv/h: Hair loss within two or threeweeks,1 million μSv/h: Hemorrhage.4 million μSv/h: Death
How much Radiation Have People inJapan been Exposed to? How risky is it?Radiation levels are more higher near Fukushimanuclear power plant. However, radiation levels inTokyo have been 10 times normal, which is stillvery low.
ConclusionFukushima nuclear power plant accident isserious. However, the accident is not the same asChernobyls at all. Although, after the accident,bad health consequence of human would notappear soon, Japan have to work on a healthproblem over the long term.