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The conventional approach for radiation protection is based on the ICRP's linear, no threshold (LNT) model of radiation carcinogenesis, which implies that ionizing radiation is always harmful, no matter how small the dose. But a different approach can be derived from the observed health effects of the serendipitous contamination of 1700 apartments in Taiwan with cobalt-60 (T1/2 = 5.3 y). This experience indicates that chronic exposure of the whole body to low-dose-rate radiation, even accumulated to a high annual dose, may be beneficial to human health. Approximately 10,000 people occupied these buildings and received an average radiation dose of 0.4 Sv, unknowingly, during a 9–20 year period. They did not suffer a higher incidence of cancer mortality, as the LNT theory would predict. On the contrary, the incidence of cancer deaths in this population was greatly reduced—to about 3 per cent of the incidence of spontaneous cancer death in the general Taiwan public. In addition, the incidence of congenital malformations was also reduced—to about 7 per cent of the incidence in the general public.
originally posted by: Mianeye
Hiroshima, Nagasaki, 1000 of nuclear test bombs, Chernobyl, Fukushima, 3 Mile Island, lost nuclear bombs, Nuclear power plants and it's nuclear waste, back ground radiation, Roentgen photo .
We should all be dead by now, or...
originally posted by: rickymouse
Long term exposure to moderate levels of radiation is usually not good. It also depends what the radiation is tied to. Radiation may kill cancer, but it accumulates in the thyroid and can kill off your thyroid. Taking Iodine supplements to protect our thyroid is needed when there is a lot of radiation. Without a thyroid you would need to take medications on a regular basis.
originally posted by: pl3bscheese
a reply to: Grimpachi
I don't think the type of radiation matters.
Correlation does not equal causation. What if neither radiation dose from background sources is significant, but instead pollution levels of contaminants in air and water were the driving factors in the difference?
originally posted by: UltraMind
Calculations based on data from NCRP reports show that the average level of natural background radiation (NBR) in Rocky Mountain states is 3.2 times that in Gulf Coast states. However, data from the American Cancer Society show that age-adjusted overall cancer death in Gulf Coast states is actually 1.26 times higher than in Rocky Mountain states
(C)1998Health Physics Society"