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The intake of radioactive iodine was calculated based on the radioactive caesium intake and other factors: the airborne iodine-to-caesium ratio on the days that the people worked at the reactor compound and other data. For one worker a reading was found of more than 1,000 millisieverts. [125]
On March 24, 2011, Japanese officials announced that "radioactive iodine-131 exceeding safety limits for infants had been detected at 18 water-purification plants in Tokyo and five other prefectures". Officials said also that the fallout from the Dai-ichi plant is "hindering search efforts for victims from the March 11 earthquake and tsunami". [70]
Iodine-131 (131 I, I-131) is an important radioisotope of iodine discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley. [3] It has a radioactive decay half-life of about eight days. It is associated with nuclear energy, medical diagnostic and treatment procedures, and natural gas production.
A number of safety systems at the plant had been disabled, and workers were unaware of the danger posed by the radioactive source. [29] 1989 – In the Kramatorsk radiological accident, a small capsule containing highly radioactive 137 Cs was found inside the concrete wall in an apartment building in Kramatorsk, Ukrainian SSR. It is believed ...
Radioactive iodine, which can lead to increased risk of thyroid cancer if absorbed into the body, was released into the air along with other fission products. To counteract the radioactive iodine the distribution of potassium iodide is used, as it prevents the absorption of the potentially dangerous radioisotopes of that element.
For biological effects of substances such as radioactive iodine the ingestion of non-radioactive isotopes may substantially reduce the biological uptake of the radioactive form, and chelation therapy may be applied to accelerate the removal of radioactive materials formed from heavy metals from the body by natural processes.
An accident at the Sosnovy Bor nuclear plant leaked radioactive iodine into the air through a ruptured fuel channel. February 20, 1996: Waterford, Connecticut, United States: Leaking valve forced shutdown of Millstone Nuclear Power Plant Units 1 and 2, multiple equipment failures found. 0: 254: September 2, 1996: Crystal River, Florida, United ...
Radioactive iodine-131 is a common fission product; it was a major component of the radioactivity released from the Chernobyl disaster, leading to nine fatal cases of pediatric thyroid cancer and hypothyroidism. On the other hand, radioactive iodine is used in the diagnosis and treatment of many diseases of the thyroid precisely because of the ...