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Hiroshima and Nagasaki still radioactive?

 
Feeling somewhat relieved
User ID: 1280655
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03/15/2011 04:56 PM
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Hiroshima and Nagasaki still radioactive?
Very interesting facts from the Japanese Radioactive radiation research foundation; how come we never heard of these???? For all that we learned in school these places has been "dead zones" since the A bombs sixtysomething years ago, and will remain so hundreds or thousands of years.

"Are Hiroshima and Nagasaki still radioactive?

The practical answer is, "No."

Doses from residual radioactivity in both cities are now far below the annual background dose (0.001-0.003 Sv); hence, there are no detectable effects on human health. Radioactivity was over 90% gone by one week after the bombings and was less than the background level by one year.

People often ask, "If uranium and plutonium pose a potential hazard in nuclear waste sites and were present at dangerous levels in the environment following the Chernobyl nuclear accident, why aren't Hiroshima and Nagasaki still uninhabitable?"

There are two ways residual radioactivity is produced from an atomic blast. The first is due to fallout of the fission products or the nuclear material itself--uranium or plutonium (uranium was used for the Hiroshima bomb whereas plutonium was used for the Nagasaki bomb)--that contaminate the ground. Similar ground contamination occurred as a consequence of the Chernobyl accident, but on a much larger scale (click here for more-detailed explanation). The second way residual radioactivity is produced is by neutron irradiation of soil or buildings (neutron activation), causing non-radioactive materials to become radioactive."

Read more: [link to www.rerf.or.jp]
5a wtf
Anonymous Coward
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03/15/2011 04:59 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
wisdomknight

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03/15/2011 05:01 PM
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Re: Hiroshima and Nagasaki still radioactive?
if not, they are now!
"I find your lack of faith disturbing."
Feeling somewhat relieved? (OP)
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03/15/2011 05:04 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
 Quoting: Anonymous Coward 355226


I dunno.. How many times more?
Anonymous Coward
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03/15/2011 05:05 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
 Quoting: Anonymous Coward 355226


I do not.

How many?

In a nuclear plant is uranium at 20% right? In a bomb is plutoniun right?
Anonymous Coward
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03/15/2011 05:09 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
 Quoting: Anonymous Coward 355226


I dunno.. How many times more?
 Quoting: Feeling somewhat relieved? 1280655


Hiroshima = 855 grams of uranium
[link to www.hiroshima-spirit.jp]

Fukushima = 1760 tons of Uranium ONLY, not counting MOX.
[link to www.moonofalabama.org]

Links just picked from quick google search, obvoulsy nuclear plants have alot more uranium than low lvl bombs like hiroshima.

**1 metric tonne = 1000 kilograms = 1000000 grams
Anonymous Coward (OP)
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03/15/2011 05:10 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
 Quoting: Anonymous Coward 355226


I do not.

How many?

In a nuclear plant is uranium at 20% right? In a bomb is plutoniun right?
 Quoting: Anonymous Coward 1298156


According to the article one of the bombs were plutonium, the other one uranium
Sw r (OP)
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03/15/2011 05:19 PM
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Re: Hiroshima and Nagasaki still radioactive?
Do u have idea how many tons of Uranium are in a Nuclear Plant compared to the hiroshima bomb?
 Quoting: Anonymous Coward 355226


I dunno.. How many times more?
 Quoting: Feeling somewhat relieved? 1280655


Hiroshima = 855 grams of uranium
[link to www.hiroshima-spirit.jp]

Fukushima = 1760 tons of Uranium ONLY, not counting MOX.
[link to www.moonofalabama.org]

Links just picked from quick google search, obvoulsy nuclear plants have alot more uranium than low lvl bombs like hiroshima.

**1 metric tonne = 1000 kilograms = 1000000 grams
 Quoting: Anonymous Coward 355226


That is an awful lot more for sure...you know I am not to downplay this; trying to see clearly without the fear factor.
If we look at the timeline, i find it amazing how fast it disappeared, and that speed does not depend on the quantity, does it?
Anonymous Coward (OP)
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03/15/2011 06:09 PM
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Re: Hiroshima and Nagasaki still radioactive?
bump
Anonymous Coward (OP)
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03/15/2011 06:15 PM
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Re: Hiroshima and Nagasaki still radioactive?
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