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The News That Matters about the Nuclear Industry Fukushima Chernobyl Mayak Three Mile Island Atomic Testing Radiation Isotope

Continuing crisis of Fukushima, and of the global nuclear industry

In particular, scientists believe the accident resulted in the atmospheric release of over 35,000 terabecquerels’ worth of caesium-137 – or some 42 percent of what was released during the 1986 catastrophe at Chernobyl. Caesium-137 is a radioactive isotope that has a half-life decay period of around 30 years and is capable of causing gene damage after prolonged exposure…..

Also contrary to government claims, researchers believe that a great amount of caesium-137 was discharged from the spent nuclear fuel storage ponds, which were in significant distress during the crisis as the cooling systems failed to supply water to the ponds, leading to heat accumulation and exposure of the fuel rods.

A chronicle of nuclear decay: Over half a year later, what have we learnt from Fukushima? MOSCOW Eight months since the fateful March of 2011, one of the world’s worst nuclear catastrophes that enflamed Japan’s Fukushima Daiichi Nuclear Power Plant has ceased to be the stuff of front-page frenzy. We will likely still see radioactive goods and food products popping up on the store shelves around the world, reminding us of the terrors of nuclear energy, but for many, the panic caused by the threat of contamination spreading silently in a far-off country has become yesterday’s news. But does it mean that the problems of Fukushima – and, indeed, of the global nuclear power industry – are soon to be over? Not by a long shot.
Bellona, Vladimir Slivyak, 22/11-2011 – Translated by Maria Kaminskaya
Clearly, even a cursory look at the latest developments will tell us it will be a very long time before the tragedy in Japan is safely forgotten.

In mid-November, a series of large-scale rallies took place in Fukuoka Prefecture, in the south of Japan, which is now home to some of the evacuees from Fukushima. Some 15,000 people took to the streets, demanding the closure of all Japanese nuclear power plants.

And the week before that, representatives of international media outlets were invited on a tour of the stricken plant: The Japanese authorities were, apparently, hoping to demonstrate that – having come, at the height of the disaster, under a barrage of criticism for being less than one hundred percent open about the developing crisis – they could now be counted on for complete transparency in how they related with the rest of the world.

The level of radiation that the Japanese and foreign journalists were able to register while on the visit to the site was 1,000 microsieverts near the plant – a reading that exceeds normal values by 5,000 times. A story (in Russian) carried by the Russian publication Komsomolskaya Pravda, citing the news agency ITAR-TASS, said this level was what Geiger counters showed as the reporters were approaching the station from a nearby forest. Closer to the entrance to the site, the measurements came down to 300 microsieverts – still, though, much higher than the norm, which is 0.2 microsieverts, the story said.

The journalists were taken on a tour of the station dressed in protective clothing they had been supplied in advance – hooded coveralls and full-face respirator masks, media reports said. It seems unlikely, though, that such precautions could have been sufficient to shield the journalists completely from exposure.

As laudable as this effort at transparency may be, we didn’t need this tour to know that things were far from perfect at the embattled plant. A few days prior, world media reports told us there were indications that a chain reaction may be in progress at the No. 2 reactor at Fukushima, spelling a risk of new massive releases of radiation. Xenon may have been detected in air samples taken near the reactor – a sign of possible nuclear fission taking place in the reactor…..
In particular, scientists believe the accident resulted in the atmospheric release of over 35,000 terabecquerels’ worth of caesium-137 – or some 42 percent of what was released during the 1986 catastrophe at Chernobyl. Caesium-137 is a radioactive isotope that has a half-life decay period of around 30 years and is capable of causing gene damage after prolonged exposure…..

Also contrary to government claims, researchers believe that a great amount of caesium-137 was discharged from the spent nuclear fuel storage ponds, which were in significant distress during the crisis as the cooling systems failed to supply water to the ponds, leading to heat accumulation and exposure of the fuel rods.

Of the total amount of caesium-137 spewed out by the crippled plant last spring, only 20 percent fell out on the Japanese territory, with the remaining 80 percent dispersed elsewhere and most ending up in the ocean.

The results of the study, led by Andreas Stohl from the Norwegian Institute for Air Research, were published for open peer review on the website of the scientific journal Atmospheric Chemistry and Physics…..

There is one more important detail that the researchers have noted: According to their report, radiation may have started escaping the facility even before the enormous wave hit the shore some 45 minutes after the 9-magnitude earthquake, Bloomberg reported in its story on the latest findings…..

http://www.bellona.org/articles/articles_2011/fukushima_half_year_later

November 23, 2011 - Posted by | environment, Japan

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