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TEPCO Begins Small Debris Removal On Fukushima Unit 1

TEPCO Begins Small Debris Removal On Fukushima Unit 1

NHK announced late last week that TEPCO has begun removing small debris off the top of Fukushima unit 1 with a vacuum device. This debris removal would be the small debris that is on top of the collapsed roof layer. Once this is removed they will need to cut and remove the layer of collapsed roof materials before they move on to the larger debris beneath it. Each layer presents a new risk for contamination to … Read entire article »

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New Plan To Inspect Fukushima Unit 1 Unveiled

New Plan To Inspect Fukushima Unit 1 Unveiled

IRID has published a new plan to complete phase 2 of the robot containment inspection of unit 1 at Fukushima Daiichi. The initial plan involved dropping the shape changing robot down to the basement level of the containment structure. Due to brackish water and small debris in the water they have opted to not attempt to drop the shape changing robot or another swimming robot down into the lower level. Instead they have equipped a shape … Read entire article »

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TEPCO Releases Photos Of Fukushima Unit 1 Demolition

TEPCO Releases Photos Of Fukushima Unit 1 Demolition

TEPCO released two images of the work underway to remove the refueling floor level of unit 1. They commented that this specific steel removal work was to allow access for the water spray that will be used to keep down radioactive building dust as further removal work takes place. Handout http://www.tepco.co.jp/nu/fukushima-np/handouts/2016/images1/handouts_160108_09-j.pdf This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org © 2011-2016 SimplyInfo.org, Fukuleaks.org All Rights Reserved Content cited, … Read entire article »

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Fukushima Unit 1 Discharge Canal Begins Filtration

Fukushima Unit 1 Discharge Canal Begins Filtration

The discharge canal of unit 1 has been the site of ongoing high levels of contamination since the initial disaster. TEPCO began operating a portable filtration system on the canal on November 27th. This project is of interest as it had not been announced to the public prior to implementation. There have been plans in the works to install such systems to filter the port water, discharge canals were not mentioned in that preparation. TEPCO did … Read entire article »

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Fukushima Unit 1 TIPS Inspection Done, High Radiation Found

Fukushima Unit 1 TIPS Inspection Done, High Radiation Found

A new inspection attempt of the unit 1 TIPS room has been completed between September and October of 2015. TEPCO buried the information in the monthly roadmap document. The first attempt to inspect the unit 1 TIPS room was with a robot in 2012. That was unsuccessful after the robot failed to unlock the door. These new TIPS room findings showed radiation levels higher than what TEPCO found inside the containment structure on the recent robot … Read entire article »

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The Curious Case Of Two Fukushima Workers

The Curious Case Of Two Fukushima Workers

TEPCO released a handout today providing new data on the unit 1/2 vent tower. The handout included photos from 2013 and 2015 to track the degradation of the damaged tower. It also included an up close investigation of the base of the tower, previously declared off limits due to high radiation. As can be seen in the photo below, the worker is in a full lead or titanium shielded suit. This area was over 10,000 … Read entire article »

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TEPCO Says Unit 1-2 Vent Tower Probably OK For Now

TEPCO Says Unit 1-2 Vent Tower Probably OK For Now

TEPCO has been doing another round of inspections on the unit 1-2 vent tower. They told Mainichi they didn’t think it needed to be a priority right now but further inspections could uncover information that changes that determination. The tower has been of great concern since the base of it hold lethal levels of radiation. A more recent reading showed 25 sieverts at the base of the tower. This is higher in radioactivity than many … Read entire article »

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Fukushima Unit 1 Interim Plan Released

Fukushima Unit 1 Interim Plan Released

TEPCO released information about the interim plan for cleaning off the refueling floor of unit 1. One of the major problems with unit 1 is the concrete and asphalt roof slab that fell on top of the refueling floor during the hydrogen explosion. This is creating some challenges for determining the state of the debris beneath it. The existing refueling floor steel wall framework is slated to be removed starting in November 2015. Repeated scans of … Read entire article »

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Fukushima Unit 1 Roof Mostly Removed

Fukushima Unit 1 Roof Mostly Removed

TEPCO has removed most of the roof from the cover building of unit 1 at Fukushima Daiichi. This work began in July but has been repeatedly delayed without much explanation. Removing the roof is the first part of the eventual plan to clear debris off of the reactor refueling floor. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org © 2011-2016 SimplyInfo.org, Fukuleaks.org All Rights Reserved Content cited, … Read entire article »

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Fukushima Unit 1 Discharge Canal Has Record Contaminated Water Spike

Fukushima Unit 1 Discharge Canal Has Record Contaminated Water Spike

Contamination levels rose again in the unit 1 discharge canal near the reactor building. Our records show this may have been the highest reading yet after a series of radiation spikes since early 2015. The newest readings on September 2nd showed: Cs-134  38,000 bq/liter Cs-137  150,000 bq/liter Beta β 160,000 bq/liter What has changed recently is the operation of the frozen wall,, lowering of the water height in the unit 1 basement and pumping up of water out of the subdrain pits … Read entire article »

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Fukushima Unit 1 Cover Partially Removed, Remaining Work Delayed

Fukushima Unit 1 Cover Partially Removed, Remaining Work Delayed

TEPCO removed one panel of the cover building roof of unit 1 early in the morning on July 28th. After the first panel was removed a crane could be seen extending something down into the area of the opening. No further panel removal work took place during the work day. Asahi Shimbun is reporting that further removal work for the roof will take place next week. They did not say why there would be such … Read entire article »

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Fukushima Unit 1 Airflow Blocking Door Completed

Fukushima Unit 1 Airflow Blocking Door Completed

A door to block airflow through unit 1 has been installed. The plastic and steel door was installed to help prevent air from flowing through the contaminated building once the roof of the cover structure is removed. The door was a more recent concept enacted after an inflatable plug in the large equipment shaft partially failed. Work to remove the roof of the cover building continues through the week. http://photo.tepco.co.jp/date/2015/201507-j/150727-01j.html  This article would not be possible without … Read entire article »

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TEPCO To Resume Fukushima Unit 1 Cover Removal Work In Late July

TEPCO To Resume Fukushima Unit 1 Cover Removal Work In Late July

TEPCO announced work to remove the unit 1 cover will resume on July 28th and take about 4 months to remove the six roof panels. Work was stopped in part when they discovered the balloon plug for the equipment hatch had been dislodged by concrete rubble. Engineers decided to let work resume without a major change to the balloon. TEPCO did not explain why it would take four months to remove the roof panels.   This article … Read entire article »

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Second Fukushima Unit 1 Robot Investigation Complete

Second Fukushima Unit 1 Robot Investigation Complete

TEPCO/IRID released a very small selection of video clips from the second investigation that took place over two days along with some photos and handouts. Previous work that included inserting a scope into containment estimated the water level was just below the catwalk level. Images and video from the new robot inspections hint that they may have seen a visual of that water level through the catwalk floor.   Radiation levels cited by TEPCO were low by comparison. … Read entire article »

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2nd Robot Enters Fukushima Unit 1 Containment

2nd Robot Enters Fukushima Unit 1 Containment

TEPCO is reporting that the second robot has been put into containment and made 6 of the 11 data stops on the second inspection route. This is roughly half way through the distance of the second route, noted in red on the graphic below. They plan to resume work tomorrow morning.   Rough translation of the report in TEPCO’s daily press handout.: 4 / 15 ~ you are ready this time, from collecting further information of the reactor containment … Read entire article »

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Report On Fukushima Unit 1 Containment Inspection 2015

Report On Fukushima Unit 1 Containment Inspection 2015

Hitachi’s shape changing robot (at least one of them, they have more) is abandoned and dead inside the containment of unit 1. The robot did manage to transmit quite a bit of information and was still working two days later when they cut the cord. This is a small bit of good news as it proved that the robot model could withstand fairly high radiation for a long period of time without the camera or … Read entire article »

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Fukushima Containment Robot To Be Abandoned Inside

Fukushima Containment Robot To Be Abandoned Inside

TEPCO announced that the robot stuck in containment will not be recovered. They will send a team into the reactor building today to cut the cable for the robot and leave it in containment. Entry of the second robot was postponed. TEPCO has not made the data collected by the first robot public yet. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org © 2011-2016 SimplyInfo.org, Fukuleaks.org … Read entire article »

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Fukushima Unit 1 Robot Still Transmitting Data

Asahi Shimbun is reporting that the robot stranded inside unit 1 containment is still transmitting data. This rules out radiation damaging the controls. From Asahi Shimbun: “According to an IRID official, the operators tugged on the robot’s cable and sent instructions for it to change shape, but it still would not move. The robot’s camera, dosimeter and temperature gauge were not damaged, and the robot was still capable of transmitting data.” They also stated that the actual travel time was between 11:20 to 2 pm. The remaining hours of the work effort was the time needed to insert the robot into containment. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org © 2011-2016 SimplyInfo.org, Fukuleaks.org All Rights Reserved Content cited, quoted etc. from other sources is … Read entire article »

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Fukushima Unit 1 Robot Failure, What We Know So Far

Fukushima Unit 1 Robot Failure, What We Know So Far

Per Yahoo News Japan, the robot died about 2/3 of the way through the planned route. Specifics about what kind of failure the robot had were not available yet but Kyodo News reports that workers tried to tug on the data cable but were unable to move the robot. Workers are currently working on an effort to retrieve the robot from containment. This map of the planned work, rotated to match the existing floor plan orientation … Read entire article »

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Fukushima Unit 1 Robot Dies In Containment During Inspection

Fukushima Unit 1 Robot Dies In Containment During Inspection

Kyodo News is reporting the robot died inside unit 1′s containment during the inspection. It stopped functioning part way through the inspection. TEPCO has provided no other information about this yet. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org © 2011-2016 SimplyInfo.org, Fukuleaks.org All Rights Reserved Content cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this … Read entire article »

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Fukushima Unit 1 Containment Inspection Conducted

Fukushima Unit 1 Containment Inspection Conducted

TEPCO reports that the work is underway and released three images of the robot being inserted into the containment structure. The images of the robot were taken with a scope camera and confirm the robot was inserted into containment, made it down to the catwalk and successfully rearranged itself for the inspection work. No additional information was given by TEPCO at this time but they did label the handout for the work as “preliminary” so additional … Read entire article »

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Unit 1 Basement Shows Highly Contaminated Water Remains

Unit 1 Basement Shows Highly Contaminated Water Remains

TEPCO is making an effort to lower the water level in some of the basement rooms of the unit 1 reactor buildings. As groundwater has been pumped up via the outdoor subdrain pits, this has created a situation where the standing water in the basements could end up higher than the surrounding groundwater. This could lead to more contaminated water leaking out of the buildings. TEPCO is installing more water level monitoring sensors to better … Read entire article »

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Fukushima Daiichi Unit 1 Containment Inspection Starts April 10th

Fukushima Daiichi Unit 1 Containment Inspection Starts April 10th

According to a recently released handout from TEPCO and IRID the robot inspection of unit 1′s containment should commence around April 10th with the second inspection on April 13. Scope inspections to install monitoring instruments into containment will happen roughly around the same time frame.  This 3D map of containment shows where the two robot inspection routes are planned to take place. Each numbered spot on the route is a location they plan to stop, take photos, … Read entire article »

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Muon Scan Finds No Fuel In Fukushima Unit 1 Reactor Vessel

Muon Scan Finds No Fuel In Fukushima Unit 1 Reactor Vessel

TEPCO published the results of the muon scan done by IRID and their cooperating partners. No fuel was found in the reactor vessel of unit 1 Fukushima Daiichi. The handout in Japanese can be found here A very rough English translation can be found here This was as expected by many (including us) who have been documenting the other evidence that indicated this was the likely case. The plan for the future with unit 1 is to insert … Read entire article »

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Fukushima Daiichi Discharge Canal Sees Large Contamination Increase

Fukushima Daiichi Discharge Canal Sees Large Contamination Increase

We previously reported about increases at the unit 1 discharge canal back in February. The highs back then were in the 4 digit range. More recent testing in the last week has seen much higher readings. Readings taken: 3.13.2015 Beta radiation: 110,000 bq/liter Cesium 137: 84,000 bq/liter Cesium 134: 24,000 bq/liter The highest readings in February that raised concerns were: Beta radiation: 8,200 bq/liter Cesium 137: 2,000 bq/liter Cesium 134: 580 bq/liter TEPCO has said nothing about the increases found in February and nothing … Read entire article »

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Radiation Spike At Fukushima Daiichi Discharge Canal

Radiation Spike At Fukushima Daiichi Discharge Canal

A significant spike in contaminated water levels at Fukushima Daiichi in the unit 1 discharge canal was reported today. Readings between Feb 14th and Feb 18th saw a considerable jump beyond normal fluctuations for these two locations. The only new work began between the 14th and 18th is the concreting of the unit 4 seawater piping trench. It is not clear if this had any influence on the readings or if so, why it would. Feb … Read entire article »

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Fukushima Unit 1 Containment Inspection To Begin In April

Fukushima Unit 1 Containment Inspection To Begin In April

AP is reporting that Fukushima Daiichi unit 1 will get the first of three anticipated containment inspections in early April of this year. Hitachi showed off the shape changing robot to the press this week. The robot will be used once at unit 1 then stored in a shielded box. Hitachi is expecting to use a slightly different robot for the inspection of each unit but didn’t say what those differences would be. This upcoming inspection … Read entire article »

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Muon Scans Begin At Fukushima Daiichi

Muon Scans Begin At Fukushima Daiichi

Muon scans have begun at Fukushima Daiichi for the unit 1 reactor. The set of three self contained boxes has been installed at unit 1 of Fukushima Daiichi and will run for about a month before results could be known. The project was initially conceived by scientists at Los Alamos national lab in the US. The project is currently being run by Toshiba and coordinated by IRID. After initial test runs at a research reactor facility in … Read entire article »

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Fukushima Unit 1 To Begin Muon Scan In February

Fukushima Unit 1 To Begin Muon Scan In February

Work to install the muon scanners at Fukushima Daiichi unit 1 should be underway by February 2015. A number of research projects leading up to this have been taking place. These include efforts to determine the proper amount of shielding required so the detectors can function at the plant among the high levels of radiation and test scans of a functional reactor at Tokai. With both of these projects done, the first installation is planned for … Read entire article »

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Fukushima Unit 1 New Photos Reveal Additional Damage

Fukushima Unit 1 New Photos Reveal Additional Damage

Photos taken during the removal of the cover on unit 1 showed some additional conditions on the refueling floor that had not been apparent until now. A section of the concrete reactor cover was dislodged during the events at unit 1. The other end of the cover section is not visible, this would give a better idea of how the section became dislodge. It could indicate that the events at unit 1 were worse than … Read entire article »

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Fukushima Unit 1 Reactor Well Cover Dislodged

Fukushima Unit 1 Reactor Well Cover Dislodged

TEPCO showed in a handout that got little attention that the concrete reactor well cover for unit 1 is dislodged. The concrete cover sits on top of the reactor containment cap to provide both radiation shielding and some level of blast shielding. TEPCO has admitted in the past that there is at least some leakage out the top of unit 1 but had not explicitly admitted the reactor well cover was dislodged. These covers are a … Read entire article »

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Fukushima Unit 1, 2nd Cover Section Removed

Fukushima Unit 1, 2nd Cover Section Removed

TEPCO has removed a second section of building cover from unit 1. As the first section was removed TEPCO claimed to take readings to prove no contamination was blowing away. There was no offsite dust monitoring done and no 3rd party monitoring done. TEPCO declared things “safe” and removed another cover section. This work is being done after demolition work on the unit 3 building caused a dust cloud to blow out of the plant undetected … Read entire article »

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Fukushima Unit 2 Subdrain Has Larger Problem

Fukushima Unit 2 Subdrain Has Larger Problem

In recent weeks TEPCO began reporting about high radiation readings in subdrain pits near the reactor buildings. TEPCO’s original intention was to begin using these to draw out contaminated water, treat this water and release it to the sea. The subdrain pits existed before the disaster to keep groundwater from infiltrating the reactor building basements. TEPCO noted that the subdrain pit wells in this area are inter connected. They at least hinted they think this may have caused … Read entire article »

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Fukushima Unit 1 Fuel Removal Delayed

Fukushima Unit 1 Fuel Removal Delayed

TEPCO announced they would delay the removal of both spent fuel from the pool and from the reactor vessel at unit 1, Fukushima Daiichi. What is not clear is exactly why. TEPCO cited having to remove excessive debris from the buildings. They have known the conditions inside the building and the refueling floor for a number of years. Investigations into the building and refueling floor began as early as 2011 with an in depth screening … Read entire article »

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Fukushima; Radiation Spike In Unit 1 Discharge Canal

Fukushima; Radiation Spike In Unit 1 Discharge Canal

TEPCO hasn’t released radiation readings for the set of discharge canals for well over a year. This location has been historically quite high when they sampled it before. TEPCO announced that the sampling location in the discharge canal was again quite high while a downstream location was not. They provided no explanation where they assume the highly contaminated water is migrating to. Beta radiation:  120,000 bq/liter Cesium 134:  31,000 bq/liter Cesium 137: 95,000 bq/liter TEPCO closed off the end of the discharge … Read entire article »

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Unit 1 Cover Removal Begins At Fukushima Daiichi

Unit 1 Cover Removal Begins At Fukushima Daiichi

Initial work to remove the cover off unit 1 at Fukushima Daiichi has begun. The initial work includes cutting a hole into the tent cover and spraying a fixative to try to lower dust releases. Actual removal is scheduled for next year with demolition work falling further into 2016. The unit is currently scheduled for spent fuel removal in 2017. http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_141022_06-j.pdf    This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation … Read entire article »

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Fukushima Unit 1 Cover Removal Delayed To Late October

Fukushima Unit 1 Cover Removal Delayed To Late October

47 News is reporting that TEPCO will delay the removal of the cover on unit 1 at Fukushima Daiichi until late October. The removal was previously scheduled for late September. It is not clear if the delay is due to additional precautions being implemented after scientists found that demolition work on unit 3 had released a considerable amount of radiation to the environment or if other events have added to the delays. http://www.47news.jp/smp/CN/201410/CN2014101001002100.html This article would not be … Read entire article »

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IRID Admits Fukushima Unit 1 Fuel May Be Outside Of Containment

IRID Admits Fukushima Unit 1 Fuel May Be Outside Of Containment

The head of IRID made this interesting admission during the fall meeting of Atomic Energy Society of Japan last week. He admitted that the melted fuel for unit 1 is outside the pedestal and could possibly be outside of containment. He cited this situation as being one of the reasons they are looking into alternative methods of fuel extraction, not just TEPCO’s initial idea of extraction through the reactor vessel. He did state that they think … Read entire article »

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New Fukushima Worker Testimony Describes Suicide Mission To Vent Unit 1

New Fukushima Worker Testimony Describes Suicide Mission To Vent Unit 1

Kyodo News is running a series of articles based on some of the official testimony of Fukushima Daiichi workers. These workers tell important details TEPCO didn’t always disclose along with their personal stories of battling the disaster. Some of the more disturbing and new revelations include efforts to vent unit 1 by workers at the plant on March 12 as the disaster began to worsen. Hideyoshi Endo, a shift supervisor was one of the workers who took … Read entire article »

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Fukushima: Unit 1 Cover Removal & Demolition Work To Begin Soon

Fukushima: Unit 1 Cover Removal & Demolition Work To Begin Soon

TEPCO has announced their plan to remove the cover of unit 1 so that debris on the refueling floor can be cleaned off. This work will enable viewing of the spent fuel pool and the condition of the reactor well. The work has come under increased scrutiny after it was discovered that similar demolition work at unit 3 had caused contamination up to 50km from the plant due to the wind blowing radioactive building dust. TEPCO’s … Read entire article »

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