Iodine radioactive long-term effects

The long-term effects of antithyroid drug treatment on the prevalence of ANCAs has been examined in 209 consecutive patients with hyperthyroidism who had been treated with antithyroid drugs, radioactive iodine, thyroidectomy, or a combination of these treatment options... 

When used at doses that defiver 150 Gy or more (<150p,Gi I/g of thyroid tissue), radioactive iodine is an effective cure for Graves disease and is associated with few acute side-effects. Potential long-term adverse side-effects, including thyroid cancer and genetic damage, have yet to be observed in individuals treated as children or adolescents with 1. 

Major accident External release of a large fraction of the radioactive material in a large facility (e.g. the core of a power reactor). This would typically involve a mixture of short and long lived radioactive fission products (in quantities radiologically equivalent to more than tens of thousands of terabecquerels of iodine-131). Such a release would result in the possibility of acute health effects over a wide area, possibly involving more than one country long-term environmental consequences. 

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