27/03/2011

What is what, as far as radiation is concerned.



Danger level
Radiation doseEffect
SOURCE: WORLD NUCLEAR ASSOCIATION
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2 millisieverts per year (mSv/yr)
Typical background radiation experienced by everyone (average 1.5 mSv in Australia, 3 mSv in North America)
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9 mSv/yr
Exposure by airline crew flying New York-Tokyo polar route
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20 mSv/yr
Current limit (averaged) for nuclear industry employees
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50 mSv/yr
Former routine limit for nuclear industry employees. It is also the dose rate which arises from natural background levels in several places in Iran, India and Europe
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100 mSv/yr
Lowest level at which any increase in cancer is clearly evident.
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350 mSv/lifetime
Criterion for relocating people after Chernobyl accident
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400 mSv/hr
The level recorded at the Japanese nuclear site, 15 March
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1,000 mSv single dose
Causes (temporary) radiation sickness such as nausea and decreased white blood cell count, but not death. Above this, severity of illness increases with dose
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5,000 mSv single dose
Would kill about half those receiving it within a month

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