Fukushima Daiichi: the situation (one year) after (ASN and IRSN)

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izentrop
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by izentrop » 13/04/16, 20:54

Obamot wrote: you should get out of your hole because nature is not so bad!

Feel good with fish ladders, while everywhere else:
biodiversity, the disappearance of the species-s-accelerated
Disappearance-of-insects-a-disaster-silent
fish-way-to-total disappearance

Apart from that, everything's fine :|
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Obamot » 13/04/16, 21:54

So after all that you wrote, according to you it would be better to Chernobyl in contaminated area ... : Mrgreen: : Cheesy: : Mrgreen:

You know that it's good for you! : Lol:
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by moinsdewatt » 15/04/16, 19:53

News from the '' Ice Wall '' in Fukushima:

The Nippon Nuclear Regulatory Agency has given its green light for the use of the ice wall.
The start of the cooling will begin soon. Cooling that will take 3 months for the first phase.

Fukushima's underground ice wall

March 30, 2016

Japan's Nuclear Regulation Authority (NRA) on Wednesday approved the use of an underground "wall of ice" at the destroyed Fukushima nuclear plant to help contain spills of contaminated water into the Pacific Ocean.

After several delays, the Tokyo Electric Power Company (Tepco), on Thursday will be able to begin the process of freezing the ground around the buildings that are the most affected by the earthquake and tsunami of March 11, 2011.

"This operation is a challenge, and it is necessary to carry it out with extreme care, and with all necessary details (for follow-up)," said the regulator's president Shunichi Tanaka at the end of a meeting held on Wednesday, NHK reported .

NRA had been researched in this study, originally raised in 2013, to certify that Tepco, which has a long history of negligence, can safely manage radioactive water in facilities.

Meanwhile, more than 1,500 pipes have been inserted into the earth at a depth of 30 meters (98 feet) around the oven units, for the procedure.

Through pipes thesis has saline solution at temperature of minus 30 degrees Celsius will be injected to freeze the ground in touch with the frozen pipes and create a barrier to prevent prevention groundwater from seeping into the buildings and mix with polluted refrigerant.

The goal is to reduce the amount of radioactive water that accumulates in the basements of the buildings and prevents its leakage in the Pacific Ocean.

Currently between 150 and 200 tons of water in the structures daily and this system is expected to reduce the amount of 50 tons at full capacity.

The process of creating the wall will be completed in three phases, the first of which will take place, and its effects will be felt within 40 days approximately.

http://www.business-standard.com/articl ... 628_1.html

and the 4 Avril a first refrigeration section has been activated:

One portion of the ice wall was activated on Thursday, with additional parts set to be activated over the next few months. TEPCO says this is a precautionary measure to make sure they do not make any adjustments.

http://www.digitaljournal.com/news/envi ... cle/461995

It cost 312 $ millions!
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Remundo » 24/04/16, 10:14

Where are the chanters of nuclear power to cast a laudatory gaze on this wonder of refrigeration in every sense of the word? : roll:
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by moinsdewatt » 24/04/16, 14:50

Fukushima: the discharge of contaminated water at sea is the preferred solution

the 20 April 2016, Europe1

A call had been made to companies and research institutes to study options for deciding the fate of 800.000 cubic meters of partly decontaminated water.

Five years after the Fukushima disaster, the Japanese Ministry of Industry has decided. Discarding at sea is the quickest and cheapest way to get rid of the tritium-laden water stored at the Fukushima hilly power station, a Japanese Ministry of Industry commission said. An appeal had been made to companies and research institutes to study various options for deciding the fate of the 800.000 cubic meters of water, partly decontaminated, stored in tanks at the Fukushima plant.

Evaporation or infiltration into the soil envisaged. This is water of different origins that has been pumped after being in contact with highly radioactive facilities. It has been purified of some 62 radionuclides but is still loaded with tritium, a radioactive substance that can not be filtered with current techniques. In addition to disposal at sea, various potential solutions (evaporation, deep infiltration into the soil, solidification with cement and / or other substances) have been proposed and evaluated in terms of the financial cost and the time required for any sluicing.

A cost estimated at 3,4 billion yen. It appears that it would take seven years and four months to get rid of this water in the ocean after dilution for a cost estimated at 3,4 billion yen (27 million), while the other techniques would cost ten times to 100 times more for a period of eight years and two months to thirteen years, according to documents of this commission. It will now set the results of its reviews in a report that will be studied by the Ministry and the company Tepco, manager of Fukushima, to make a decision this fall.

For years now, various experts of the sector, the Japanese Nuclear Regulatory Authority or the International Atomic Energy Agency (IAEA) recommend the rejection of this water at sea, arguing that it is not possible to to store it in the long term, that it is done elsewhere in the world for the power stations in service, and affirming that the tritium does not present danger when it is diluted.

http://www.europe1.fr/international/fuk ... ee-2725036
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Remundo » 24/04/16, 19:23

they could also store it for a few half-lives of tritium ... which is 12-13 years old if my memory is good.

After 40 years, the activity will be divided by 10 approximately,

tritium is rather a dirt, it makes you water T2O or HTO which irradiates in beta - (electrons) inside living beings having the misfortune to have absorbed.

if they want to throw that out, let them go on really high seas ... dilution is perhaps the less bad option, but not a "solution".
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by moinsdewatt » 05/07/16, 13:08

Five years after Fukushima, the Pacific displays near-normal radioactivity

The Echoes | The 04 / 07

According to the Scientific Committee on Oceanic Research, the seabed and the port near the Fukushima power plant are still heavily contaminated.

Remember: 11 March 2011, an 9 magnitude earthquake, and a giant tsunami had devastated the Tohoku region (northeast), making 19.000 dead and missing. The phenomenon had caused a serious nuclear accident at the Fukushima power plant, causing one of the largest radioactive pollution of the oceans ever occurred. In the days following the tragedy, seawater intended to cool the reactors had carried nuclear materials into the ocean, then dispersed by the currents. The radioactive substances had been disseminated to the coasts of the United States.


Five years later, a report by the Scientific Committee on Ocean Research, which brings together international experts, reveals that levels of radioactivity across the Pacific Ocean are rapidly returning to normal. The cross-tabulation of data from twenty radioactivity studies generated by the Japanese power station revealed that levels of radioactivity in the Pacific were falling rapidly, after being tens of millions of times higher than normal just after the disaster. "For example, in 2011, nearly half of the fish samples in coastal waters off Fukushima contained dangerous levels of radioactive material," said Pere Masque, co-author of the study published by the Annual Review of Marine Sciences. "In 2015, that number had dropped to less than one per cent above the limit." For this study, researchers examined levels of radioactive cesium found off the coast of Japan and across the Pacific to North America. Cesium, a by-product of nuclear energy, is highly soluble in water, making it ideal for measuring the release of radioactive material into the ocean.

The seabed still heavily contaminated

But the study also notes that the seabed and the port near the Fukushima power station are still heavily contaminated following the worst nuclear accident in the world since Chernobyl in 1986. "Monitoring of levels of radioactivity and marine life in this region must continue," added Dr. Masque, professor of environmental chemistry at Edith Cowan University in Western Australia.

http://www.lesechos.fr/industrie-servic ... 011957.php
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Obamot » 05/07/16, 15:22

moinsdewatt wrote:
Les Echos wrote:Five years later, a report from "Scientific Oceanic Research Committee ", which brings together international experts, reveals that levels of radioactivity across the Pacific Ocean are quickly returning to normal.

Maybe just define what their " normality And should we still keep the word " scientific "!!? !!

moinsdewatt wrote:
Les Echos wrote:« As an example, in 2011, nearly half of the fish samples in coastal waters off Fukushima contained hazardous levels of radioactive material Said Pere Masque, co-author of the study published by the Annual Review of Marine Sciences. "Radioactive cesium levels off the coast [...] in 2015, that number had dropped to less than one percent above the limit ».

He nakashi go to eat it for 10 years his fish caught off Fukushima : Twisted:
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Christophe » 06/07/16, 17:21

moinsdewatt wrote:
Five years after Fukushima, the Pacific displays a almost normal radioactivity

The Echoes | The 04 / 07 (

(...)

The seabed still heavily contaminated


Very strong these journalists :)

So is it almost normal or is it highly contaminated? Should know how thin!
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Re: Fukushima Daiichi: the situation (one year) after (ASN and IRSN)




by Ahmed » 06/07/16, 19:02

It is almost normal that it is contaminated! You really have to explain everything! :D
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