RE: How dangerous is radiation?

['Chris de Morsella' via Everything List]

 

 

From: everything-list@googlegroups.com 
[mailto:everything-list@googlegroups.com] On Behalf Of John Clark
Sent: Sunday, July 06, 2014 10:46 AM
To: everything-list@googlegroups.com
Subject: Re: How dangerous is radiation?

 

On Sat, Jul 5, 2014 at 9:23 PM, Russell Standish <li...@hpcoders.com.au> wrote:

 

> IIUC, the occupational acceptable limits are based on studies of survivors of 
> Hiroshima and Nagasaki (who actually received a range of
different exposures, depending on how screened they were at the time of the 
blast)


 The survivors of Hiroshima and Nagasaki were unique in that they received 
their radiation virtually instantaneously, it is probably far more dangerous to 
receive radiation in that way because the cells have no time to make repairs; 
even so the survivors didn't develop more solid cancers than the average 
Japanese unless they received more than 100 millisieverts, and they didn't have 
a larger chance of getting leukemia unless they got more than 200 
millisieverts. By comparison the average resident of this planet receives 2.4 
millisieverts from background radiation, but they received that radiation over 
the course of a full year not in a fraction of a second as the people of 
Hiroshima and Nagasaki did.

 

Clearly the time over which a given level of exposure occurs is a significant 
factor in the outcome.

Chris



  John K Clark 

 

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