radiation.
When you start talking about risk radioactivity panic mounts and the reactions are for the most exaggerated and irrational. Perhaps because the radiation is a danger that you can not perceive with their senses a kind of malevolent ghost that hovers in industrial air-strikes and silenziosamante.
Added to this is sometimes incomplete information deliberately scare rattles off figures that the values \u200b\u200bof radioactivity without explaining its meaning.
So to do a bit of clarity: the `units of measurement of the impact that radiation may have on the human body is the sievert per unit of time.
Normally you use 2 sub-units namely `millisievert (0.001 sievert) and microsievert (0.001 millisieverts). According to wikipedia
:
Total average radiation dose for Americans: 6.2 mSv / year ie 6200 microsievert / year or 0.70 microsievert / Time
New York-Tokyo flights for airline crew: 9 mSv / year ie 9000 microsievert / year ie 1 microsievert / Time
Smoking 1.5 packs / day: 13-60 mSv / year ie 13000-60000 microsievert / year or 1.484 to 6.849 microsievert / Time
So when you read the values \u200b\u200bof radiation and must be careful not to confuse millisievert microsievert with, and understand that units of time is compared to the given value.
values \u200b\u200bencountered so far beyond the zone of 30 km from the reactor are well below the risk threshold. A sendai
bottom values \u200b\u200bare around 0:20 microsievert per hour.
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