Fukushima dismantling crew removes 400 tons of spent fuel from crippled reactor
RT | November 5, 2014
The first of four sets of spent nuclear fuel rods has been removed from a damaged reactor building at Japan’s Fukushima power plant, scoring a major success in an effort to dismantle the quake and tsunami-wrecked facility.
The 1,331 spent fuel rod assemblies weighting some 400 tons have been recovered from the upper levels of the Reactor 4 building after a year-long operation, a spokeswoman for Fukushima operator TEPCO reported on Wednesday. The last 11 assemblies were removed on Tuesday.
The recovered assemblies were placed in a storage pool at ground level of the plant, the company said.
TEPCO is still to remove 180 rod assemblies that haven’t been used at the reactor and are considered less dangerous because, unlike the spent fuel, they have not been irradiated. Some of the unused rod assemblies are already in the new storage pool. The task is expected to be completed by the end of the year.
Three other reactor buildings are holding almost 1,400 fuel assemblies in storage pools, and they must be recovered too. The operation started with Reactor 4 because it was damaged most in the March 2011 disaster due to a series of hydrogen explosions inside the building and is in danger of collapsing.
The operations at Reactors 1, 2 and 3 would be more difficult, because unlike Reactor 4 they were operational at the time of the disaster and experienced meltdowns, resulting in higher levels of radioactive contamination.
TEPCO plans to start removing fuel from Reactor 1 in 2019, two years later than originally planned. At the moment preparations for the removal are underway, with the operator recently removing the canopy over the building to allow debris removal.
The utility is surveying the interior of the Reactor 2 building and removing debris at the Reactor 3 using remote-controlled robots.
After dealing with the fuel, the most difficult task may be addressed – the recovery of reactor cores. The unprecedented operation may start in 2025, five years after initially planned.
Fukushima radiation levels underestimated by five times – TEPCO
RT | February 8, 2014
TEPCO has revised the readings on the radioactivity levels at the Fukushima No. 1 nuclear plant well to 5 million becquerels of strontium per liter – both a record, and nearly five times higher than the original reading of 900,000 becquerels per liter.
Strontium-90 is a radioactive isotope of strontium produced by nuclear fission with a half-life of 28.8 years. The legal standard for strontium emissions is 30 becquerels per liter. Exposure to strontium-90 can cause bone cancer, cancer of nearby tissues, and leukemia.
Tokyo Electric Power Co. originally said that the said 900,000 becquerels of beta-ray sources per liter, including strontium – were measured in the water sampled on July 5 last year.
However, the company noted on Friday that the previous radioactivity levels had been wrong, meaning that it was also likely readings taken from the other wells at the disaster-struck plant prior to September were also likely to have been inaccurate, the Asahi Shimbum newspaper reported.
The Japanese company has already apologized for the failures, which they said were a result of the malfunctioning of measuring equipment.
TEPCO did not mention the radioactivity levels of other samples of both groundwater and seawater taken from between June and November last year – which totaled some 140.
However, the erroneous readings only pertain to the radiation levels measured in water – readings taken to measure the radiation levels in air or soil are likely to have been accurate.
In the basement of the station, the drainage system and special tanks have accumulated more than 360,000 tons of radioactive water. The leakage of radioactive water has been an ongoing problem in the wake of the accident at the Fukushima-1 nuclear power plant.
TEPCO also said on Thursday that 600 liters of contaminated water – which had 2,800 becquerels of beta-ray sources per liter in it, leaked from piping leading to a tank at the Fukushima nuclear plant.
A record high level of beta rays released from radioactive strontium-90 was detected at the crippled Fukushima nuclear power plant beneath the No. 2 reactor’s well facing the ocean, according to the facility’s operator who released news of the measurements mid-January.
TEPCO measured the amount of beta ray-emitting radioactivity at more than 2.7 million becquerels per liter, Fukushima’s operator said as reported in the Japanese media.
In March 2011, an earthquake triggered a tsunami that hit Japan’s coast, damaging the Fukushima Daiichi nuclear power plant. The catastrophe caused the meltdown of three nuclear reactors at the facility, leading to the worst nuclear disaster since Chernobyl.
The water used to cool the reactors has been leaking into the soil and contaminating the ground water ever since. Some of the radioactive water has been escaping into the Pacific Ocean.

Clean-up doubts: Many Fukushima evacuees may never return home
RT | November 13, 2013
Many of the people who were forced to evacuate after the 2011 triple meltdown at the Fukushima nuclear power plant may never return, Japanese lawmakers admitted, overturning initial optimistic government pledges.
A call to admit the grim reality and step back from the ambitious Fukushima decontamination goals came from Prime Minister Shinzo Abe’s coalition parties. Japan has so far spent $30 billion on the clean-up program, which has proven to be more difficult to carry out than initially expected.
The new plan would be for the government to fund relocation to new homes for those who used to live in the most contaminated areas.
“There will come a time when someone has to say, ‘You won’t be able to live here anymore, but we will make up for it’,” Shigeru Ishiba, the secretary General of Abe’s Liberal Democrat party said in a speech earlier this month.
On Tuesday, evacuees reacted with anger at the government’s admission.
“Politicians should have specified a long time ago the areas where evacuees will not be able to return, and presented plans to help them rebuild their lives elsewhere,” Toshitaka Kakinuma, a 71-year-old evacuee, told the Asahi Shimbun newspaper.
Some 160,000 people escaped the vicinity of Fukushima Daiichi, when a powerful earthquake and tsunami transformed the plant into the world’s worst nuclear disaster since Chernobyl. About a third of them are still living in temporary housing. They were promised that this would not last for longer than 3 years.
In August the death toll among the evacuees surpassed the threshold of 1,599 lives, which is how many people in the prefecture were killed by the disaster itself. The displaced residents are suffering from health problems, alcoholism and high rates of suicide.
The Ministry of Environment wanted to decontaminate 11 townships in the affected area, bringing the average annual radiation dose to 20 millisieverts, a level deemed safe by the International Centre for Radiological Protection. It further pledged to pursue a long-term goal reducing it to 1 millisievert per year.
The clean-up, however, has been marred by delays and reports that workers sometimes simply dumped contaminated waste rather than collect it for safe storage, causing the environment ministry push back the deadline. There are also calls on the government to abandon the more ambitious dose target, arguing that it is unrealistic.
Some evacuees said they wouldn’t return even after the first phase of the cleanup, saying the dose of 20 millisieverts per year still poses health risks.
“No matter how much they decontaminate I’m not going back because I have children and it is my responsibility to protect them,” Yumi Ide, a mother of two teenage boys, told Reuters.
The fear of radiation has soared in Japan in the wake of the Fukushima disaster, with rallies against the use of nuclear power scoring record attendance. The government shut down all 50 remaining Japanese reactors for safety checks, and there is strong pressure to keep them offline.
The Japanese government is reportedly seeking to borrow an extra $30 billion for the Fukushima cleanup and compensations, which would raise the total cost of the disaster response to $80 billion. The figure does not include the cost of decommissioning reactors to be carried out by the plant operator, Tepco. The company recently complained about the huge expense of the process, which may last at least 30 years.
Fukushima open air fission? Radiation surge can’t be blamed just on random leaks
RT | September 2, 2013
The latest surge in radiation at Fukushima nuclear plant may suggest not only additional water leaks at the site, but could also mean fission is occurring outside the crippled reactor, explains Chris Busby from the European Committee on Radiation Risk.
The increase in radiation reading is too significant to be blamed on random water leaks, believes Busby.
RT: Just how serious is the situation now in Japan?
Chris Busby: I think this is an indication that it has actually deteriorated significantly, very suddenly in the last week. What they are not saying and what is the missing piece of evidence here is that radiation suddenly cannot increase unless something happens and that something cannot be leakage from a tank, because gamma radiation goes straight through a tank. The tank has got very thin metal walls. These walls will only attenuate gamma radiation by 5 per cent, even when it is 1 cm thick.
Although they may think this is a leak from the tank, and there may well be leaks from the tank, this sudden increase of 1.8 Sieverts per hour is an enormously big dose that can probably kill somebody in 2 to 4 hours.
Today there was another leak found at 1.7 Sieverts per hour in more or less the same place. This huge radiation increase, in my mind means something going on outside the tanks, some radioactive fission is occurring, like an open air reactor, if you like, under the ground.
RT: What impact will this have on the clean-up operation and those who are involved in that operation?
CB: First of all it is clearly out of control and secondly no one can go anywhere near it. Nobody can go in to measure where these leaks are or do anything about them, because anybody who is to approach that sort of area would be dead quite quickly. They would be seriously harmed.
RT: Then presumably, someone who was there earlier, not knowing that the radiation levels were so high, are at risk now?
CB: I think many people are going to die as a result of this just like liquidators died after Chernobyl. They were dying over the next ten years or so.
RT: Why has TEPCO failed to contain the radiation?
CB: I think no one has actually realized how bad this is, because the international nuclear industries have tried to play it down so much, that they sort of came to the idea that somehow it can be controlled. Whereas all along, it could never be controlled.
I’ve seen a photograph taken from the air recently, in which the water in the Pacific Ocean is actually appearing to boil. Well, it is not boiling. You can see that it’s hot. Steam is coming off the surface. There is a fog condensing over the area of the ocean close to the reactors, which means that hot water is getting into the Pacific that means something is fissioning very close to the Pacific and it is not inside the reactors, it must be outside the reactors in my opinion.
RT: Surely the international nuclear industry should have come to TEPCO’s help before this?
CB: Yes. They should have done that. This is not a local affair. This is an international affair. I could not say why it has not. I think they are all hoping that nothing will happen, hoping that this will all go away and keeping their fingers crossed. But from the beginning it was quite clear that it was very serious and that there is no way in which this is not going to go very bad.
And now it seems to have suddenly got very bad. If that photograph I’ve seen is true, they should start evacuating people up to a 100 kilometer zone.
RT: So not only those that live in the vicinity but also those that live within 100 km could be at risk?
CB: I say that this might be a faked dubbed photograph, but if that is real and these levels of 1.8 Sieverts per hour are real, than something very serious has happened and I think people should start to get away.
RT: Since the radiation is leaking into the ocean, will it not have a major ecological impact elsewhere?
CB: Of course. What happens there is that it moves all the radioactivity up and down the coast right down to Tokyo. I’ve seen a statement made by Tokyo’s mayor saying this will not affect the application of Tokyo to be considered for the Olympic Games. I actually thought they ought to consider evacuating Tokyo. It is very, very serious.
