Japanese media reports IAEA urged to dump contaminated water into ocean but no such statement made in real
February 19
Japanese media is misleading the Japanese citizens to accept the discharge of contaminated water to the Pacific as a request of an international organization
On 2/17/2015, IAEA (International Atomic Energy Agency) completed third review of Japan’s plans to decommission Fukushima plant.
NHK and other major Japanese media covered the press conference by Juan Carlos Lentijo, leader of IAEA inspection team and reported that he strongly recommended to consider discharging contaminated water into the Pacific.
They read the increasing contaminated water storage is stopping the decommissioning plan, they are running out of the storage place.
However on the website of IAEA, they actually state only “The IAEA team considered the current practice of storing contaminated water a temporary measure and highlighted the need for a more sustainable solution. “, which does not mention “discharge”. In the statement they highly evaluated “the improvement and expansion of systems to clean contaminated water”, “the installation of new, improved tanks to store contaminated water” and “the operation of an underground water bypass system”, which have been implemented since 2013.
None of the Japanese media released the unedited press conference video without interpreted subtitle.
http://ai.2ch.sc/test/read.cgi/newsplus/1424236682/
Source: Fukushima Diary
Walking atop an underground battle
February 19, 2015
FUKUSHIMA — The mass of machinery that engineers hope can stem the relentless flow of water into the gutted Fukushima Daiichi nuclear power plant impresses by its sheer size as well as its ambitious aim.
Huge 55cm-diameter ducts snake out from the roof of the refrigeration plant that forms the heart of this beast, which Tokyo Electric Power Co. showed the media for the first time Wednesday. When it starts beating, a minus 30 C solution of calcium chloride will course through them at 2 meters per second.
This refrigerant will circulate through more than 1,500 buried pipes encircling four of the plant’s six reactor buildings. If all goes according to plan, a “frozen earth” wall will form, stopping the influx of groundwater that now leaks back out as streams of radioactive contamination.
The refrigeration plant houses 30 units, each with a capacity of about 70 tons of refrigeration, defined as the heat reduction needed to freeze a ton of 0 C water in 24 hours. To put this in perspective, a Tepco guide described it as the freezing capacity of two tuna-fishing ships.
While the system entails 3.5km of ductwork, it will operate by the same principle as a household fridge. After absorbing heat from the soil and re-emerging from the ground, the refrigerant, now warmed up to minus 20-something, will be cooled back down to the right temperature with CFCs. All 30 units will go on full blast until the soil congeals, after which about half will be turned off, Tepco said.
Only about 15% of the equipment is in place. Tepco plans to start freezing the ground on the inland side, which is about 90% finished, before closing the circle on the coastal side.
Tepco had initially aimed to complete the installation by the end of March. But a fatal accident brought everything to halt for roughly two weeks while the company performed safety checks. Work resumed Feb. 3 but is running two to four weeks behind schedule.
“We’re putting safety before our schedule,” Fukushima Daiichi manager Akira Ono said.
Roughly half of the workers at the plant call Fukushima Prefecture home. For them, staying safe is not only about protecting themselves, but also about sparing their disaster-ravaged communities any more pain.
Snow fell at the plant on the day of the media tour. Gloves were little help against the biting cold, and the goggles shielding our eyes from radiation kept fogging up. For the 6,000-plus workers a day who toil at the ruined plant, such grim conditions have become a fact of life.
Source: Nikkei Asian Review
http://asia.nikkei.com/Japan-Update/Walking-atop-an-underground-battle
Inspectors urge Japan to dump water from Fukushima plant into ocean
February 17, 2015
Nearly four years after Japan’s massive March 2011 earthquake and tsunami, the country has made “significant progress” toward stabilizing and decommissioning the ravaged Fukushima Dai-ichi nuclear power plant, international nuclear inspectors said Tuesday.
However, the nearly 160 million gallons of contaminated water stored on-site pose massive logistical challenges, and examiners strongly urged Japan to consider controlled discharges of the liquid into the Pacific Ocean once it is treated.
The situation at the crippled plant remains “very complex” and “the benefits [of discharges] could be very, very huge” said Juan Carlos Lentijo, who led the team of 15 inspectors from the International Atomic Energy Agency on a nine-day mission that follows surveys in April and November 2013.
Japanese officials have been reluctant to take such a step at the plant 160 miles northeast of Tokyo, fearing it might further antagonize local fishermen and other residents affected by the initial accident and its aftermath.
In the past year, Japan has succeeded in removing spent and fresh fuel from one reactor, Unit 4, and reduced the inflow of groundwater into the facility. It has also taken steps to clarify which entities are responsible for particular jobs, the IAEA team noted.
But about 80,000 gallons of groundwater continue to enter the plant per day, and building and maintaining storage tanks is increasingly taxing for the 7,000 workers toiling at the site, Lentijo’s team noted. In January, a laborer in his 50s who was inspecting an empty, 33-foot-tall storage tank fell into the vessel and died.
In wake of that accident, Japan’s nuclear regulator called on plant operator Tokyo Electric Power Co. to move toward discharges of treated water.
About half of the water stored on-site has been treated to remove most radioactive contaminants, the IAEA team noted, though current technology does not allow for the easy removal of tritium, an isotope of hydrogen.
Unlike other contaminants, which are suspended or dissolved in water, tritium actually modifies the water molecules and therefore is difficult to separate out.
Still, tritium is considered one of the least hazardous radioactive materials produced by nuclear power plants, and Lentijo said “controlled discharges are a normal practice in the industry.”
“Most of the nuclear power plants are discharging treated water,” he said at a news conference in Tokyo. “This is accomplished with negligible impact on the environment and the safety of the people.”
Japan’s Ministry of Economy, Trade and Industry has solicited demonstration projects from several companies for technology that might effectively treat the tritiated water. Orange County-based Kurion said it was awarded a $10-million grant in November for a pilot programs of its technology in Japan to see if it would be effective at Fukushima.
Among its other recommendations, the IAEA team encouraged Japan to narrow down the number of options being considered for the overall decommissioning plan and to reinforce “safety leadership and safety culture” systems.
A final report from the IAEA team is expected in late March.
Source: Los Angeles Times
http://www.latimes.com/world/asia/la-fg-iaea-japan-water-fukushima-plant-20150217-story.html
Radiation spike at Daiichi Unit 1 discharge canal
- A significant spike in contaminated water levels at Fukushima Daiichi in the unit 1 discharge canal was reported today.
- The only new work began between the 14th and 18th is the concreting of the unit 4 seawater piping trench.
- Readings between Feb 14th and Feb 18th saw a considerable jump beyond normal fluctuations for these two locations.
Source: Tepco
http://www.tepco.co.jp/nu/fukushima-np/handouts/index-j.html
1,000 homes being torn down after decontamination
NHK has learned that at least 1,000 homes in Fukushima Prefecture will be demolished — even after they have been cleaned of radioactive fallout from the 2011 Fukushima Daiichi accident.
Local officials say that’s a waste of time and money. They call on the government to run the decontamination work more efficiently.
NHK polled officials from 9 Fukushima municipalities where demolition is under way. Each municipality remains partly or completely evacuated.
Officials from 3 towns said about 1,080 houses are to be torn down despite being decontaminated as requested by residents. Naraha Town reports the largest number, around 870.
Officials say leaking rain and animal intrusions are damaging the homes while residents remain evacuated. They also say many evacuees have given up on returning and found new homes instead.
The government pays for both decontamination and demolition programs in evacuation areas. The Environment Ministry says decontamination takes about 2 weeks and costs about 8,300 dollars on average.
An official says the ministry tried to speed up decontamination work at local governments’ requests. He says the ministry will now pursue efficiency as well.
Source: NHK
http://www3.nhk.or.jp/nhkworld/english/news/20150212_30.html
Fukushima child tests positive for thyroid cancer in second survey
Feb 12, 2015
FUKUSHIMA – A child in Fukushima Prefecture has been diagnosed with thyroid cancer in the latest health survey to assess the impact of the triple core meltdown that tainted the region with radiation in 2011.
Seven others in the survey of 385,000 children in Fukushima Prefecture are also suspected of having thyroid cancer but have not received a definitive diagnosis, a prefectural committee said. The survey began in April 2014, three years after the Great East Japan Earthquake and tsunami crippled the Fukushima No. 1 power plant.
The child diagnosed and the seven others tested negative in the first survey, which covered all 370,000 children in the prefecture who were 18 or younger at the time of the disaster. Those born a year after the meltdowns were not included.
“Despite the new results, I don’t think we need to change our previous view” that they were not affected by the radiation, said Hokuto Hoshi, who heads the panel.
In the first survey, 86 children were confirmed as having thyroid cancer and 23 were suspected of having it.
In both surveys, the thyroid glands were first scanned with ultrasound to measure the size and shape of any lumps, and assigned four grades of severity. Those children assigned the two highest grades were then given blood tests and cell biopsies.
The child confirmed to have thyroid cancer and the seven suspected of having it were between 6 and 17 at the time of the accident, according to Fukushima Medical University, which conducted the survey.
Source! Japan Times
Elementary particle ‘X-Ray’ for Fukushima reactors
The project is aimed at finding clues as to the location of the melted fuel, a step that is indispensable to its removal from the damaged reactors, in order to continue with decommissioning work.
Three reactors at the plant suffered meltdowns following the massive earthquake and tsunami that struck the area in March of 2011. Extremely high radiation levels have been preventing experts from locating and determining the state of the melted fuel.
The experts will soon make use of a type of elementary particle called the muon to get a peek inside the reactors.
Workers wearing protective gear used a crane on Monday to install an observation device outside the Number 1 reactor building. The time they could devote to the task was limited, since radiation levels outside the reactor building are as high as 500 microsieverts per hour.
Muons are created when cosmic rays from space collide with the Earth’s atmosphere. Scientists say about 10,000 muons per square meter reach the Earth’s surface every minute.
Experts hope that observing the particles passing through the reactor building will create images of the nuclear fuel, in the same way an X-ray works.
After workers install another device at the Number 1 reactor on Tuesday, experts will conduct observations until March. It is believed that almost all the fuel in the reactor has melted and fallen down.
Experts also plan to use muons in a different way to probe the Number 2 reactor.
Fumihiko Takasaki, professor emeritus with the High Energy Accelerator Research Organization, led the development of the observation devices.
He said the project, which was started soon after the disaster happened, is finally being used at the plant. He said he hopes the technology will help with the decommissioning of the reactors by determining whether the fuel is still in them.
Fukushima ice wall plan delayed by 2 weeks
February 9, 2015
The operator of the Fukushima Daiichi nuclear power plant says a plan to fill in underground tunnels at the defunct facility will be delayed by 2 weeks.
TEPCO officials announced the new schedule at a meeting with the Nuclear Regulation Authority, or NRA, on Monday. The new timetable will start late this month.
TEPCO had initially planned to remove highly-radioactive water from the tunnels after building an ice wall to stop the water from leaking out of reactor buildings.
The workers poured cement into the tunnels while draining contaminated water. But blocking the water was not successful as it continued to flow through the buildings.
The officials said in the new plan, they will fill in areas where unblocked tunnels and reactor buildings join to stop the tainted water from seeping out.
NRA regulators mostly approved the plan. They will continue to probe what else is necessary to do.
The setback for water blocking effort is likely to affect the plan to build the ice wall.
TEPCO officials say the plan is already 2 weeks to a month behind schedule due to a fatal accident at the plant.
They say they do not yet know how the latest delay will affect the whole decommissioning project. They are still studying the next steps they need to take.
Source: NHK
http://www3.nhk.or.jp/nhkworld/english/news/20150210_04.html
Robotic snake set to examine innards of melted Fukushima reactor
Feb 7, 2015
HITACHI, IBARAKI PREF. – A snakelike robot designed to examine the interior of one of the three meltdown-hit reactors at the Fukushima No. 1 nuclear power plant is ready to begin its expedition.
Assessing the damage in the reactors is a crucial step in decommissioning the poorly protected plant, which was crippled by core meltdowns triggered by the Great East Japan Earthquake and tsunami in March 2011.
Remote-controlled robots are essential for the job because the radiation in the reactors chambers is so high it would kill any person who got close.
Using information gathered by the robot, Tokyo Electric Power Co., the plant operator, plans to repair the damaged chambers enough so they can be filled with water in preparation to remove the melted radioactive debris, an operation planned to begin in about a decade.
The 60-cm-long robot, developed by electronics giant Hitachi and its nuclear affiliate Hitachi-GE Nuclear Energy, was demonstrated this week at a Hitachi-GE facility northeast of Tokyo. It is expected to enter the No. 1 reactor as early as April, officials said.
It has a lamp at the front and is designed to crawl like a snake through a 10-cm-wide pipe into the containment vessel. From there it must dangle and descend onto a platform just below the reactor core’s bottom, an area known as the pedestal.
There, the robot is to transform into a U-shaped crawler and capture live images and temperature and radiation levels and transmit them to a control station outside the building.
Expectations for the robot probe are high after earlier efforts at assessment met with limited success.
“Depending on how much data we can collect from this area, I believe (the probe) will give us a clearer vision for future decommissioning,” Hitachi-GE engineer Yoshitomo Takahashi said.
After its exploratory trip, which will make the robot extremely radioactive, technicians plan to store it in a shielded box. They have no plans to reuse it.
Different robots must be designed for each reactor, since each is slightly different.
According to computer simulations, all of the fuel rods in unit 1 probably melted and pooled at the bottom of the containment chamber, but there had been no way of confirming that until now.
A brief fiberscope observation conducted in 2012 produced images that were scratchy and of limited use.
To assess the debris at the bottom of the damaged reactor chambers, which are usually filled with water, an amphibious robot is being developed for deployment next year.
The damage from the melted fuel burned holes in the reactors, thwarting efforts to fill them with cooling water. As a result, water must be pumped into them continuously, producing an endless stream of radiation-contaminated water that is hampering the plant’s cleanup process.
Source: Japan Times
Skeptical Fukushima residents monitoring radiation levels in their communities
Members of Fukushima Saisei no Kai (Resurrection of Fukushima) drive through Iitate village to measure radiation levels on Jan. 28.
February 08, 2015
On a recent day in late January, a minicar departed from the Iitate village office in Fukushima Prefecture with stickers attached that said, “We are driving slowly because we are measuring radiation levels.”
The vehicle, operated by Fukushima Saisei no Kai (Resurrection of Fukushima), a local residents’ nonprofit organization, is equipped with GPS and radiation measurement equipment, allowing it to record locations and airborne radiation levels.
“Although the level has decreased considerably from immediately after the Fukushima nuclear accident, it is still high,” said Mitsukazu Sugiura, 65, the driver of the vehicle, on Jan. 28.
Distrust of the central government, a need to know to make future plans and a desire to maintain ties with neighbors have led to groups of residents around Fukushima Prefecture taking the initiative to monitor radiation levels on their own.
All of Iitate village, which is divided into 20 districts, has been designated as an evacuation zone.
While the village government measures radiation levels at two locations in each district, it has also commissioned Fukushima Saisei no Kai to conduct more detailed measurements.
The organization’s vehicle is driven by village residents who commute from where they have evacuated to, such as Minami-Soma or Fukushima cities.
Twice a month in each district, group members conduct measurements along almost all areas along roads where residents lived.
Average radiation levels for each 100-meter-square area have been posted on the group’s website.
The near-term goal of the Iitate village government is to encourage residents to return with the planned lifting in March 2016 of the evacuation order. However, residents cannot erase concerns about radiation effects on their health as well as questions about the possibility of resuming agriculture.
Local farmer Muneo Kanno, 64, established Fukushima Saisei no Kai three months after the March 2011 accident at the Fukushima No. 1 nuclear power plant along with scientists and friends. Kanno felt that scientific data would be needed to decide whether to return to Iitate and resume farming.
“In order to tie it with the resurrection of the community, it will be important to have local residents directly involved,” he said.
Residents of the Okubo-Yosouchi district in central Iitate began measuring radiation levels near their homes and in the farm fields from 2013. The catalyst was the monthly meetings that were held for the 14 households in the hamlet that had gone their separate ways after the evacuation order was issued.
At those meetings, residents were curious about the radiation levels. However, some said the central government could not be trusted, so they decided they had to check for themselves what the radiation levels were.
Immediately after the nuclear accident, the residents were slow to evacuate because they were not informed by the central government about the estimated spread of radioactive materials.
Masuo Nagasho, 67, a former village government employee, suggested residents conduct their own measurements.
“The attraction of the village was the people,” he said. “What I most regretted was the destruction of ties between people and the life of the community that had led before to working together for festivals and rice planting.”
In 2014, the monitoring effort spread to the entire district, which has about 70 households. The measurement has provided the perfect opportunity for residents to maintain their neighborly ties by having lunch together. The meals are provided by a local women’s group.
TARGETING WATERS OFF NUCLEAR PLANT
Another citizens’ group, Umilabo, has been monitoring radiation levels off the coast of the crippled Fukushima No. 1 nuclear plant since November 2013.
One member, Riken Komatsu, 35, works at a fishcake manufacturing plant in Iwaki. He was born and grew up in the area, but when customers asked about the safety of the fish being used, he could only pass along data collected by Tokyo Electric Power Co., the Fukushima No. 1 plant operator, and the Fukushima prefectural government.
“I wanted to go out into the ocean and pass along data I was certain about,” Komatsu said.
He and other fishing enthusiasts began the project to collect soil from the seabed and fish, which were taken to the local aquarium for measurement of the amount of radioactive materials they contained.
In November 2014, 10 flatfish were caught about 1.5 kilometers off the coast from the nuclear power plant. Radioactive materials tend to accumulate in flatfish because it lives near the seabed. Although radioactive cesium was detected in five of the 10 flatfish, the concentration was less than half of the standard in the Food Sanitation Law of 100 becquerels or less per kilogram.
There has been no detection of radioactive materials for almost all of the fish born after the nuclear accident.
In the Oguni neighborhood of Date city’s Ryozenmachi district, a resident’s group began taking airborne radiation level measurements from six months after the nuclear accident. Data for each 100-meter-square area were listed on a map, and the information has been updated annually since.
“The radiation has no color or smell, but the map has enabled us to see it,” said Soyo Sato, 66, who heads the group.
The neighborhood has a mix of households that were designated for evacuation because of high radiation levels as well as those that were not so designated. Residents who were exempt from the designation used the data on the map to argue that there was very little difference in radiation levels with areas designated for evacuation.
That led to a settlement with TEPCO for compensation levels that were close to those offered to residents living in the designated areas.
Hideki Ishii, a project associate professor of landscape architecture at Fukushima University, has provided support for self-monitoring efforts.
“When residents see the actual data for their community that they collected, they will think more seriously about whether people can live there and if the compensation levels offered are appropriate,” Ishii said. “It also fosters the ability to not only think about the current situation, but also the future.”
Source: Asahi Shimbun
http://ajw.asahi.com/article/0311disaster/fukushima/AJ201502080025
About the Evacuate-Fukushima-Now battle cry, from a chronological perspective.
February 8, 2015
Someone somewhere commented:
“The Evacuate-Fukushima-Now battle cry hasn’t been thought out too well because it fails to recognize the moral questions that arise when non-victims speak for the victims—thinking that it is their job to rescue people who have decided to stay and haven’t asked for help.”
I wish to answer here to that partial judgment. Erroneous because that judgment was made much afterwards competely out of its historical chronological perspective:
The Evacuate Fukushima Now battle cry at the start of the Fukushima catastrophe was well justified and absolutely right in itself.
It was very soon countered by the Japanese government orchestrating a gigantic campaign about « decontamination » thru all the media, constructed and directed by government contracted big advertising-PR companies, playing very well on all the « furuisato » (hometown attachment) feelings of the Fukushima people ; their attachment to their lands, to their own history, to their own Fukushima dialect and cultural traditions, to their family ties etc., brainwashing the people that after a possible-to-be-made-decontamination program paid by government everyone everything would go back to the life of before, normal as before.
Due to that government huge mediatic campaign to control the situation, to keep the people to stay, promising them full decontamination, lying to them continuously that everything in Daiichi was under control, just a very local technical problem to resolve, they cut in the bud any possible evacuation idea.
The Government well-orchestrated mediatic campaign knew very well how to play on the Furuisato feelings of most the Fukushima people to manipulate them, resulting in the majority of people in Fukushima willingly participating in the brainwashing and PR campaign. The support Fukushima campaign came from the bottom up as much as from the government.
It is the same in every contaminated community: the deniers always outnumber those who understand the danger and want out. They get intimidated, bullied and silenced. All one can do is leave at one’s own expense.
To not forget that the majority of those Fukushima people did not have the financial means on their own to abandon everything behind to attempt to evacuate adventurously with their whole family in another prefecture, and that the government did all it could to deter them from evacuating, the people losing any possible damage claims if evacuating out of the prefecture, their properties devalued, their house credits still to be paid.
Due to all this the Evacuate Fukushima battle cry became very soon an empty battle cry, the Japanese anti-nuclear movement itself abandoned it very early to the benefit of the other battle-cries of « Kodomo wo Mamore » (protect the children), «Genpatsu Iranai » (we don’t need nuclear) and « Saikado hantai » (We are against the restart of nuclear plants).
The « Evacuate Fukushima Now » battle-cry was absolutely right, it was so damn right that the Japanese government spent millions on a mediatic campaign to cut it in the bud, to defeat that idea, to keep the people from evacuating, to make them stay by all means living with radiation, in contaminated environment. To after 4 years push now the evacuees of the 20kms evacuated zone to return to live in high radiation.
Tepco starts to fill Unit 3 trench with concrete
February 5, 2015
Unit 3 trench filling work situation
This effort to concrete in the unit 3 trench had not been previously announced and the area had not had any unusually high levels of contamination compared to other areas.
TEPCO concreted the unit 3 trench in some unannounced work at Fukushima Daiichi.
Today’s chedule from 10:00 AM to 13:42PM they unloaded 100m3 of concrete into the Unit 3 trench.
Source: Tepco
http://www.tepco.co.jp/nu/fukushima-np/handouts/2015/images/handouts_150205_01-j.pdf
Sendai Nuclear plant restart delayed again
In September, 2 reactors at the plant in Satsuma Sendai City in Kagoshima Prefecture became the first in Japan to meet new, tougher government regulations introduced after the 2011 nuclear disaster in Fukushima. Later, the governor of Kagoshima gave consent to Kyushu Electric Power Company to restart them.
The utility still needs approval from the Nuclear Regulation Authority for technical documents. It told the authority on Thursday that preparing them will take 2 or 3 months longer than expected because the authority says many revisions are needed.
One of the documents explains in detail facility designs for the plant’s Number 1 reactor. The company originally planned to submit it in December. It now says it will take until the end of February, due to the need to provide more detailed data and explanations on earthquake resistance.
The utility says it will submit by the end of March a separate document describing designs for facilities that are shared with the Number 2 reactor.
The restart may not come until May or later, possibly the summer, pending the regulator’s approval of the documents and onsite inspections.
All of Japan’s commercial nuclear reactors remain offline.
Analysis of Japanese Radionuclide Monitoring Data of Food Before and After the Fukushima Nuclear Accident
February 4, 2015
- The study reviewed foods testing for cesium 137 contamination and also strontium 90 contamination.
- Official assumptions had been than there was a set ratio of cesium 137 to strontium 90 across all foods.
- This is even more problematic as testing for actual strontium 90 in foods is done less often due to the complexity of the testing method.
- What was found is that over time the ratio of strontium 90 in foods had increased.
- A new study in the journal Environmental Science & Technology looked at governmental food testing in Japan.
In an unprecedented food monitoring campaign for radionuclides, the Japanese government took action to secure food safety after the Fukushima nuclear accident (11 March 2011). In this paper we analyze a part of the immense data set, in particular radiocesium contaminations in food from the first year after the accident. Activity concentrations in vegetables peaked immediately after the campaign had commenced, but they decreased quickly, so that by early summer 2011 only few samples exceeded the regulatory limits. Later, accumulating mushrooms and dried produce led to several exceedances of the limits again. Monitoring of meat started with significant delay, especially outside Fukushima prefecture. After a buildup period, contamination levels of meat peaked by July 2011 (beef). Levels then decreased quickly, but peaked again in September 2011, which was primarily due to boar meat (a known accumulator of radiocesium). Pre-Fukushima 137Cs and 90Sr levels (resulting from atmospheric nuclear explosions) in food were typically lower than 0.5 Bq/kg, whereby meat was typically higher in 137Cs, and vegetarian produce was usually higher in 90Sr. The correlation of background radiostrontium and radiocesium indicated that the regulatory assumption after the Fukushima accident of a maximum activity of 90Sr being 10% of the respective 137Cs concentrations may soon be at risk, as the 90Sr/137Cs ratio increases with time. This should be taken into account for the current Japanese food policy as the current regulation will soon underestimate the 90Sr content of Japanese foods.
Source: Environmental Science & Technology
Last December’s fallout in Futaba increased 3.7 × as December of 2013
February 4, 2015
According to NRA (Nuclear Regulation Authority), Last December’s fallout level of Cs-134/137 increased 3.7 times much as December 2013 in Fukushima.
From their report “Readings of environmental radioactivity level by prefecture” released on 1/30/2015, the fallout level in Futaba county was 6,200 MBq/km2・month in December of 2014.
It was 1,657 MBq/km2・month in December of 2013.
The readings of other areas in Fukushima prefecture are not reported.
NRA hasn’t made any announcement on this rapid increase in fallout level.
http://radioactivity.nsr.go.jp/en/contents/10000/9394/24/195_20150130.pdf
http://radioactivity.nsr.go.jp/ja/contents/9000/8745/24/195_20140131.pdf
Source: Fukushima Diary
Last December’s fallout in Futaba increased 3.7 × as December of 2013
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