After the nuclear bombing of Hiroshima, people still live there.

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After the nuclear bombing of Hiroshima, people still live there.

How long does it take for the radiation to go away?
 
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How long before the started to inhabit the area?
 


Straight away, radiation is really the least of your problems if somebody detonates a bomb above your head.
Only about 10-15% of the initial casualties were due to radiation and long term very few - something like a few hundred excess cancer deaths over the last 50years.

Basically everybody close enough to receive a dangerous radiation dose are killed by the blast or it's immediate results.
 


Nusc said:
After the nuclear bombing of Hiroshima, people still live there.

How long does it take for the radiation to go away?

That is a legitimate question.
 


The most dangerous isotope from a Hiroshima type bomb is probably Iodine 131 with a half life of 8days, so after a couple of months it is essentially zero.
Ceasium 137 with a half life of 30years is also produced but it's not very easily absorbed in the body.
 
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