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Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia

 
Anonymous Coward
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03/02/2012 08:45 AM
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Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
[...] By middle of April, 133Xe was fairly uniformly distributed in the middle latitudes of the entire Northern Hemisphere and was for the first time also measured in the Southern Hemisphere (Darwin station, Australia). [...]

During the accident events, 133Xe and 137Cs from FD-NPP were dispersed throughout the Northern Hemisphere and eventually also reached the Southern Hemisphere. [...]

In April all measurement stations recorded an enhanced (but due to radioactive decay, decreasing) background of 133Xe caused by the FD-NPP emissions, indicating the transition to complete dispersion in the Northern Hemisphere (see Stohl et al., 2012). Even the Australian station Darwin started recording enhanced 133Xe concentrations in April, indicating penetration of radioactive contamination into the Southern Hemisphere. [...]

[link to www.atmos-chem-phys.net]

[link to enenews.com]
Anonymous Coward (OP)
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03/02/2012 08:46 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
Title: Xenon-133 and caesium-137 releases into the atmosphere from the Fukushima Dai-ichi nuclear power plant: determination of the source term, atmospheric dispersion, and deposition
Source: Atmospheric Chemistry and Physics; Atmos. Chem. Phys., 12, 2313–2343, 2012 www.atmos-chem-phys.net/12/2313/2012/ doi:10.5194/acp-12-2313-2012
Authors: A. Stohl1, P. Seibert2, G. Wotawa3, D. Arnold2,4, J. F. Burkhart1, S. Eckhardt1, C. Tapia5, A. Vargas4, and T. J. Yasunari6
1 NILU – Norwegian Institute for Air Research, Kjeller, Norway
2 Institute of Meteorology, University of Natural Resources and Life Sciences, Vienna, Austria
3 Central Institute for Meteorology and Geodynamics, Vienna, Austria
4 Institute of Energy Technologies (INTE), Technical University of Catalonia (UPC), Barcelona, Spain
5 Department of Physics and Nucelar Engineering (FEN),Technical University of Catalonia (UPC), Barcelona, Spain
6 Universities Space Research Association, Goddard Earth Sciences and Technology and Research, Columbia, MD 21044, USA
Date: Received: 8 October 2011 – Published in Atmos. Chem. Phys. Discuss.: 20 October 2011
Revised: 1 February 2012 – Accepted: 23 February 2012 – Published: 1 March 2012
Anonymous Coward
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03/02/2012 09:00 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
XENON-133 is also used in anesthesia. Globalwarmingtards should be rejoicing. this will help slow down climate change. geoengineering.
Monbazillac

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03/02/2012 09:02 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
wut the heck amazed
Anonymous Coward
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03/02/2012 09:11 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
Maybe instead of carbon taxing us to death, we should be "Rad Taxing" Japan to death before we all die.
Atom-Boy

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03/02/2012 09:12 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
Xenon-133 is relative harmless compared to all the other
Products from F'Shima!

Last Edited by The real and almighty Atom-Boy on 03/02/2012 09:16 AM
G.Y.!B.E.
Anonymous Coward
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03/02/2012 09:31 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
[snip]

Regarding 133Xe, we find a total release of 16.7 (uncertainty range 13.4–20.0) EBq, which is the largest radioactive noble gas release in history not associated with nuclear bomb testing.

There is strong evidence that the first strong 133Xe release started very early, possibly immediately after the earthquake and the emergency shutdown on 11 March at 06:00 UTC.

The entire noble gas inventory of reactor units 1–3 was set free into the atmosphere between 11 and 15 March 2011. For 137Cs, the inversion results give a total emission of 35.8 (23.3–50.1) PBq, or about 42% of the estimated Chernobyl emission.

Our results indicate that 137Cs emissions peaked on 14–15 March but were generally high from 12 until 19 March, when they suddenly dropped by orders of magnitude exactly when spraying of water on the spent-fuel pool of unit 4 started.

This indicates that emissions were not only coming from the damaged reactor cores, but also from the spent-fuel pool of unit 4 and confirms that the spraying was an effective countermeasure.

[link to www.atmos-chem-phys-discuss.net]

~
bug
Anonymous Coward (OP)
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03/02/2012 09:33 AM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
[snip]

Regarding 133Xe, we find a total release of 16.7 (uncertainty range 13.4–20.0) EBq, which is the largest radioactive noble gas release in history not associated with nuclear bomb testing.

There is strong evidence that the first strong 133Xe release started very early, possibly immediately after the earthquake and the emergency shutdown on 11 March at 06:00 UTC.

The entire noble gas inventory of reactor units 1–3 was set free into the atmosphere between 11 and 15 March 2011. For 137Cs, the inversion results give a total emission of 35.8 (23.3–50.1) PBq, or about 42% of the estimated Chernobyl emission.

Our results indicate that 137Cs emissions peaked on 14–15 March but were generally high from 12 until 19 March, when they suddenly dropped by orders of magnitude exactly when spraying of water on the spent-fuel pool of unit 4 started.

This indicates that emissions were not only coming from the damaged reactor cores, but also from the spent-fuel pool of unit 4 and confirms that the spraying was an effective countermeasure.

[link to www.atmos-chem-phys-discuss.net]

~
bug
 Quoting: Anonymous Coward 1295673


Thanks bug.
Anonymous Coward (OP)
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03/02/2012 01:08 PM
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Re: Study: First time in history xenon-133 detected in Southern Hemisphere — Cs-137 also measured — Darwin station, Australia
bump





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