FUKUSHIMA NUCLEAR DISASTER NEWS

東京電力福島第1原子力発電所事故報道 TEPCO TOKYO JAPAN

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TEPCO still can't prevent Fukushima radioactive     water from leaking into soil, sea

Fukushima nuclear plant operator TEPCO reports that the coolant   system of the fifth reactor was shut down due to a water leak.     The system was halted after a leak near one of the valves was     detected, according to the company’s press release.

The cooling system uses seawater that is being first pumped into the
decontamination system and is then being fed to the reactors and the spent
fuel pools. According to TEPCO, the temperature of the coolant liquid in the
spent fuel pools is currently 23 degrees Celsius and no changes in the level of
radioactive contamination has been reported yet.
 
The biggest nuclear plant disaster for the last 25 years occurred after when
following the the magnitude 9.0 Tōhoku earthquake the Fukushima plant was
hit by a tsunami that flooded three out of six reactors triggering their
meltdown. It became the largest nuclear incident since the Chernobyl disaster
in April 1986 and the second (after Chernobyl) to measure Level 7 on the
International Nuclear Event Scale.
 
Currently the biggest problems the plant’s personnel are facing are the
accumulation of radioactive water and its storage. About 440,000 tons of highly
radioactive water is currently being stored in underground tanks and cisterns.
The amount of contaminated water underground is increasing by 400 tons per
day due to the groundwater flowing in from the higher ground.
 
Starting this April TEPCO initiated an experiment to freeze 11,000 tons of
radioactive water that accumulated in the plant’s underground tunnels, to
prevent it from its leakage into the soil and, finally, into the sea. However, due
to some particular characteristics of the tunnels some of the water could not
be frozen.

 

Angry Fukushima farmers bring large cow to Tokyo center

Angry farmers from Fukushima brought a large cow to the center of Tokyo    Friday to demand Japan's government investigate a disease they say cattle   have developed since the nuclear disaster three years ago.

Operators of non-profit "Kibo no Bokujo", or "Farm of Hope", delivered a full-
size black cow to the front of the agriculture ministry to demand an
investigation into why it and many other animals have developed white dots on
their skin since reactors went into meltdown after the earthquake and tsunami of March 2011.
The farm is located only 14 kilometres (nine miles) from the nuclear plant and
is keeping some 350 cows that were abandoned in the area when their owners
had to evacuate because of radiation contamination.
"Our cows cannot be shipped as meat. They are evidence of lives affected by
radiation," said Masami Yoshizawa, leader of the farm, in front of the ministry,
as his supporters and media looked on.
Fellow Fukushima farmer Naoto Matsumura said: "What if this started
happening to people? We have to examine the cause of this and let people
know what happened to these animals."
The vast farmland in Fukushima has been contaminated by radioactive
materials from the Fukushima plant, forcing tens of thousands of local
residents to give up their homes to live in temporary shelters.
The government says it could take decades to clean the region, but scientists
say many residents may never be able to return because of the contamination.
 
Kazuto Tatsuta, who worked on cleanup at nuclear plant,
hopes his work 'tells people about things that the media never see'
 
Justin McCurry in Tokyo
theguardian.com, Thursday 22 May 2014 12.27 BST
 
イメージ 1
The main character in 1F:
The Labour Diary Of Fukushima Dai-ichi Nuclear Power Plant,
stands near a shattered reactor. Photograph: Kazuto Tatsuta/Kodansha/AP
 
 
Like many of the thousands of men who have worked at Fukushima Daiichi
nuclear power plant over the past three years, Kazuto Tatsuta was driven by
a sense of mission.
 
"I had been looking for work around the time of the disaster and wondered if
there was anything I could do to help the region," Tatsuta said.
 
After six months working for one of the myriad subcontractors at Fukushima
Daiichi, his exposure to radiation was already nearing the legal annual limit of
20 millisieverts, so he resigned.
 
He left with a rare insight into the realities of life at arguably the world's most
hazardous industrial cleanup site. Now he has framed his memories in graphic
form in 1F (Ichi-Efu), a new manga whose publication comes as Japan debates
the future of its dozens of mothballed nuclear reactors.
 
As an insider's account, 1F: The Labour Diary of Fukushima Daiichi Nuclear
Power Plant, has proved popular among readers seeking an antidote to patchy
information from the government and the plant's operator, Tokyo Electric
Power Company (Tepco), and at times wildly speculative media reports.
 
 
イメージ 2
Tatsuta draws the main character in his comic.
Photograph: Koji Sasahara/Kodansha/AP
 
 
Drawing on a cast of characters loosely based on his former workmates,
Tatsuta leaves nothing to the imagination. There are accounts of workers'
early-morning journey to the plant from their digs in nearby towns and cities,
and intricate illustrations of the protective clothing they must change into,
and remove, every day.
 
The brisk dialogue is replete with vocabulary and work practices only an insider
could know. As they start their shifts, workers tell each other to "be safe";
the manga's abridged title, 1F, is the little-known nickname given Fukushima
Daiichi by workers and local people.
 
Tatsuta says he did not consider his work dangerous and, despite the rigours
of spending hours in protective clothing and a full-face mask, he never thought
about quitting. His most uncomfortable moments, he said, were being unable to
urinate while sheathed in his radiation suit.
 
Although Tatsuta was unable to take notes or sketch scenes while at work,
those who have visited the plant will attest to the accuracy of every
painstakingly reproduced scene, from the layout of the rest areas where he
worked to the abandoned neighbourhoods that encircle the stricken plant.
 
"I had done some work as a manga artist before then, but I didn't apply for the
Fukushima job with the intention of writing a manga," Tatsuta, 49, told the
Guardian at his studio outside Tokyo.
 
He first considered writing a manga soon after he left the plant in late 2012.
He drew and wrote the first chapter and started knocking on publishers' doors,
but failed to find an editor who was interested until he approached Kodansha.
 
"We could see straight away that it was highly original," said Kenichiro
Shinohara, editor of Morning, a weekly manga magazine in which 1F first
appeared in serialised form last autumn. "It's surpassed our expectations and
has obviously caught the attention of people who don't usually read manga."
 
The initial print run of 150,000 copies was unusually large for a work by a
relatively unknown manga artist, yet sales have been brisk since it appeared in
book form at the end of April. Kodansha said there were plans for editions in
English, French and German.
 
But readers looking to Tatsuta for confirmation that the Daiichi cleanup has
been left largely in the hands of unscrupulous firms with links to organised
crime, and that workers are sent into dangerous areas with minimal training and
substandard equipment, may be disappointed.
 
"As a group and as individuals, I found them all to be decent people,"
Tatsuta said.
 
"I don't have a profound message to give the reader, other than to point out
that these are men who are doing their best to get the job done away from the
limelight. Politicians and experts are always on TV debating Fukushima,
but the workers have no voice. I hope to give them one through my manga."
 
Tepco posts regular updates about progress in key areas of Fukushima Daiichi
and invites groups of journalists to tour the facility several times a year, yet
there is much about the work of the 3,000-plus men who work in shifts at the
plant that remains hidden.
 
"The media have left a gap in people's understanding," said Tatsuta, who
prefers not to reveal his face or his real name as he hasn't ruled out a return
to the plant and wants to show solidarity with his "anonymous" workmates.
 
"We hear a lot about what the media are privy to – the water storage problem,
the removal or fuel assemblies and the like – but what I hope to do is to tell
people about things that the media never see."
 
Drawing entirely from memory, Tatsuta takes the reader on a virtual tour of
the areas where exhausted men eat and rest, the filling stations that service
hundreds of trucks, buses and cars carrying workers and equipment, and the
construction site for yet more tanks to relieve the buildup of contaminated
water.
 
He suggests that there is truth, though, in reports that many of the labourers
are exploited. Tatsuta answered a job advertisement promising 20,000 yen
(£117) a day, yet initially earned less than half that. And he shares concerns
that as more skilled workers leave because they have reached their radiation
exposure limit, finding enough replacements to push forward with
decommissioning will become more difficult.
 
about their experiences at Fukushima Daiichi, Tatsuta recalls his time there as
a mixture of drudgery and camaraderie.
 
"The labourers at Fukushima get a bad press, which I think is unfair," he
said. "They're depicted as rough, but they are no different from the workers
you would find on an ordinary building site in Tokyo."
 
19 3月 2014, 12:25

東京電力 福島第一原発の汚染水1万3千トンを再浄化

イメージ 1
 
 東京電力は、福島第一原子力発電所の汚染水浄化システム(ALPS)が不具合のため停止したため、汚染水およそ1万3千トンを再浄化せざるを得ない。19日、共同通信が伝えた。
  システムの3つの系統すべてを一時停止する決定は、18日、専門家らが一つの系統の汚染水浄化プロセスの効果が不十分である事を突き止めた後下された。東京電力によれば、水1リットル当たりの放射性物質の含有レベルは、浄化後、およそ1千万ベクレルだった。もしシステムが正常に機能した場合、レベルは1リットル当たり数百ベクレルまで下がらなくてはならない。なおシステムの稼働再開は、来月4月までには行えると見られている。
 
   ALPSは、トリチウムを除く主要な62種の放射性物質を水中から浄化するため開発されたものだ。
 

Fukushima radiation monitoring: is the worst over?

イメージ 1

"Since 2011 we were off the coast trying to assess some of
the levels of different radio nuclides, the contaminants coming
from Fukushima and then their fate in the ocean The worst has
passed in terms of the immediate dozes," Ken Buessler,
Scientist at Woods Hole Oceanographic Institution and
Director of the Center for Marine and Environmental
Radioactivity. 

Mr. Buessler has launched a crowd funded project to assess ocean
contamination from the Fukushima Daiichi event.
 
As I understand, you are doing a research project off the coast of
Japan. What are you looking for exactly?
 
Since 2011, as early as June we were off the coast trying to assess
some of the levels of different radio nuclides, the contaminants
coming from Fukushima and then their fate in the ocean – which ones
move with the currents, which ones end on the seafloor and how much
accumulates in the food chain.
 
What are the current research results? What have you found?
 
Well, certainly, the levels have decreased. I mean, we were amongst
some of the first with our Japanese colleagues to say that there were
still continued leaks on that site that we should be concerned about.
 
But the worst reactions were in the early weeks to months after
March 11 in 2011. A lot of the isotopes of concern with a longish half-
life – cesium 137 and 134 – would be transported by those ocean
currents into the Pacific. So, lower concentrations are further away
you get from Japan.
 
So, if I understood you correctly, the worst has passed.
 
The worst has passed in terms of the immediate dozes. There were
things like iodine 131 that has an 8-day half-life and of very much
concern on land for things like thyroid cancer. But once those
immediate short-lived decay products are gone, then you have these
longer-lived isotopes and cesium became of concern because it was
also accumulated in fish and caused the closure of fisheries in coastal
Japan, the coastal waters near those reactor sites.
 
Has the sea life really been affected heavily by this radiation?
 
We are talking about closing fisheries because of the consumption of
contaminants and internalizing them in our bodies. We are not talking
about the health of the marina organisms. Now, at its peak, in early
April, we were concerned there could have been reproductive
mortality of marine life.
 
That is when cesium was in… we are going to have to use some units
here – becquerels – how many decays per second of cesium in a
cubic meter of seawater. Those numbers were in tens of millions.
 
They dropped down to the 1000-10,000 range pretty quickly.
 
At that point it is safe to be on those waters or in those waters
swimming, but perhaps not to eat the seafood. And that is kind of
where it is lingering today, in the 100-1000 Bq per cubic meter range
near Japan of cesium isotopes.
 
You mentioned that we could be swimming there, what about drinking
the water itself? Would that affect our health?
 
The drinking water standard in Japan is about 10,000 in those same
units. And so, again, we are talking about relatively low levels today,
that the concern is not as much from our direct exposure in the
ocean, but internalizing it and getting those, say, through seafood and
other sources.
 
Using your studies, how much time will it take to recover from this
contamination, if it is possible to recover at all?
 
That’s a good question. So, for the oceans –we are talking about
currents. Those ocean currents mix the isotopes that are in the water
across the Pacific. It is about 5,000 miles to the west coast of North
America.
 
And we just saw it in the sea, the front edge of that plum on the west
coast, again, the concentrations are much lower than at the source.
 
These things will be deluded along the way moving at the speed of
ocean currents. That is where most of the radioactivity ends up.
 
A fraction is in there by order and then they decay and die in the
seafloor. A much smaller amount, but that’s more persistent, that is
going to remain for decades near Japan until those isotopes decay.
 
If I understood your correctly, you are suggesting that the worst has
passed in Japan, but now the radioactive plum is actually slowly
migrating towards the west coast of America.
 
Correct! This we saw with debris, if you remember, a year plus ago.
Debris moves with currents and it’s blown by the wind – a soccer ball
and other trash on the surface.
 
The currents themselves take a little longer to show up. And those
follow the pathways that we know something about, but it is very hard
to predict exactly what the concentrations will be on the west coast.
 
By all predictions they will not be of human health concern on our
coast of North America.
 
I’ve covered a lot of stories on this and I have to say that you are
the most positive reporter that I’ve had. Thank you for joining us on
the show.
 

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