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Fukushima Unit 2 Muon Scan Shows No Fuel In Reactor

Fukushima Unit 2 Muon Scan Shows No Fuel In Reactor

TEPCO released preliminary information from the second muon scan of unit 2 at Fukushima Daiichi. This scan finds no fuel in the reactor vessel. The scanner can detect masses of fuel 1 meter or larger. The full scan will be completed by mid-July and should further confirm any fuel findings, or lack thereof. The scans did identify the fuel in the spent fuel pool, this helps confirm that the system is working properly and that the … Read entire article »

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Fukushima Unit 2 Gets Mini Muon Detector

Fukushima Unit 2 Gets Mini Muon Detector

Unit 2 already had one muon scan done by Nagoya University that found no fuel to likely be in the reactor vessel. They did have a small level of uncertainty because they were unable to image the very bottom of the reactor vessel. This caused them to say there was a chance some fuel debris could remain in the bottom of the reactor vessel. A recent scope inspection of unit 2′s reactor pedestal included a … Read entire article »

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Fukushima Unit 2 Containment Inspection Postponed Further

Fukushima Unit 2 Containment Inspection Postponed Further

TEPCO is reporting that the effort to put a robot into unit 2′s containment has been delayed further. Work to decontaminate around the CRD hatch is taking longer than hoped. No solid completion date was given. There is also a note that they will drill a hole into the CRD hatch to insert the robot. Opening the hatch would be too high risk due to the extremely high radiation levels found near the hatch where … Read entire article »

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Foxes Invade Fukushima Unit 2 Reactor Building

Foxes Invade Fukushima Unit 2 Reactor Building

TEPCO reported finding foxes have invaded the unit 2 reactor building. The plant has had problems with rats in the buildings and electrical systems and a few rogue dogs and tanuki. 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 … Read entire article »

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TEPCO Makes Two New Big Admissions On Fukushima Disaster

TEPCO Makes Two New Big Admissions On Fukushima Disaster

TEPCO has made two major admissions on the Fukushima nuclear disaster. The Japanese press has documented these two out of a large data dump of accident review reports. Unit 2: The new admission for unit 2 was that the pneumatic air controls for the steam relief valves failed early in the disaster. These air lines are used to open and close steam relief valves (SRV) to relieve pressure on the reactor vessel. Our extended report on unit … Read entire article »

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Fukushima Unit 2 High Radiation, New Images Show Cause

Fukushima Unit 2 High Radiation, New Images Show Cause

The extremely high radiation level admitted by TEPCO last week was given further clarification in the most recent roadmap document. The illustrations and image below from the roadmap show the highest areas. The far right gamma image shows the highest concentrations in the leaked substance below the hatch. The other illustration shows the leaked substance to be of interest. The previous report to the press by TEPCO documented the highest reading here was 9.4 sieverts/hr. TEPCO … Read entire article »

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Fukushima Unit 2 Deadly Radiation Levels Found Outside Containment

Fukushima Unit 2 Deadly Radiation Levels Found Outside Containment

TEPCO admitted to JapanTimes via Jiji that a deadly high level of radiation was found outside of unit 2′s containment. TEPCO found a reading of 9.4 sieverts per hour. These readings were taken in September but TEPCO only now admits them in the end of October. No press handout has been published on this new finding so far. Jiji says they were informed on Thursday. It is possible this was verbally conveyed at the press … 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 2 Containment Inspection Delayed To January

Fukushima Unit 2 Containment Inspection Delayed To January

TEPCO announced that the problems created by the stuck shielding blocks and high radiation in the work area will require the containment inspection to be delayed until January 2016. Rusted shielding blocks caused ongoing delays as they tried to determine a way to remove them. The area also has radiation levels as high as 1 sievert/hour. This has prevented workers from being in the area for any extended time. NHK reports that human workers were used … Read entire article »

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Fukushima Unit 2 Shield Blocks Removed

Fukushima Unit 2 Shield Blocks Removed

TEPCO has reported via their Facebook page that the stuck shield blocks in unit 2 have been removed. These shielding blocks were fused to the reactor building floor due to rust in front of the CRD hatch door. They needed to be removed in order to access that hatch to insert the robot that will investigate inside containment. TEPCO used a small piece of heavy equipment with a clamp to shake the steel plate. This eventually … Read entire article »

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Researchers Confirm 100% Of Fukushima Unit 2 Core May Have Melted

Researchers Confirm 100% Of Fukushima Unit 2 Core May Have Melted

Nagoya University announced that their ongoing research of the unit 2 reactor at Fukushima Daiichi has shown that 70-100% of the reactor core melted. The university research team has been using muon particle scanners to search for rector fuel in the remains of the unit 2 reactor vessel. While this isn’t really news to anyone who has been seriously following the disaster since 2011 it is significant that a major research project involved with the decommissioning … Read entire article »

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Fukushima Unit 2 Containment Inspection Rescheduled For November

Fukushima Unit 2 Containment Inspection Rescheduled For November

The containment robot inspection of unit 2 has been rescheduled for November. Efforts to remove shielding blocks around the X-6 penetration where they need to send the robot in has been confounded by a row of stuck shield blocks. The final row of blocks were corroded into the concrete due to rust but need to be removed remotely due to high radiation. This article would not be possible without the extensive efforts of the SimplyInfo research … Read entire article »

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Muon Scanners For Fukushima Unit 2 Are The Wrong Size

Muon Scanners For Fukushima Unit 2 Are The Wrong Size

This project was years in the planning to put a higher resolution set of muon scanners into unit 2′s buildings to look for remaining reactor fuel. The set intended for unit 2 are a higher resolution set of equipment than unit 1. Unit 2 did have a previous muon scan done by Nagoya University using their own equipment. This scan found no fuel inside unit 2′s reactor vessel but was heavily downplayed and ignored by TEPCO … Read entire article »

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Fukushima Unit 2 Probe Delayed By Stuck Shielding Blocks

Fukushima Unit 2 Probe Delayed By Stuck Shielding Blocks

A row of shielding blocks were rusted to a floor rail, causing a delay in the work at unit 2 to send a robot into containment. The current robots tasked with this work have not been able to dislodge this group of shielding blocks that need to be removed to put the containment robot in through the X-6 hatch. The work may now be put off until December or later   Unit 2 x-6 crd door shielding … Read entire article »

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Fukushima Daiichi Unit 2 Prepares For Containment Inspection

Fukushima Daiichi Unit 2 Prepares For Containment Inspection

A newly released document shows progress in the effort to inspect inside unit 2′s containment. At unit 1 they went directly to installing a shape changing robot to inspect inside containment in two directions. With unit 2 there are more problems to overcome. For unit 2 this initial attempt will be to run a different crawler bot down the CRD rail. If it is successful they hope to obtain images from inside the reactor pedestal. In … Read entire article »

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Fukushima Unit 2 Muon Scan Information Found

Fukushima Unit 2 Muon Scan Information Found

Information for the unit 2 muon scan has been found. Still not released as information through any of the official channels dealing with the disaster. The handout from Nagoya University shows unit 2 on the left and unit 5 (with fuel in the core) on the right. Researchers assume “very little” fuel is left in the reactor vessel of unit 2. They seem to have considered the set of scans a success and considered the potential for … Read entire article »

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TEPCO Under Fire For Leaks At Fukushima Daiichi

TEPCO Under Fire For Leaks At Fukushima Daiichi

TEPCO has again been receiving growing criticism over their handling of contaminated water at the plant. The first leak, from a series of drainage canals that route from up on the hill where the tank farms reside down to the port has been under increased scrutiny by Japan’s NRA. It appears that heightened oversight of this first leak may have led to the admission of the second leak where contaminated water from unit 2′s roofs was … Read entire article »

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Fukushima Daiichi Another Leak, Known Since April 2014

Fukushima Daiichi Another Leak, Known Since April 2014

TEPCO has admitted a second leak to the sea this week. Unit 2′s roof and downspouts have been draining directly out to sea since the disaster. TEPCO admits they have known about the highly contaminated leak since at least April of 2014. Water found on unit 2′s roofs was highly radioactive with 52,000 bq/liter on one roof TEPCO did attempt to manage this by throwing down bags of zeolite at the downspout entrance and again at … Read entire article »

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SimplyInfo.org Fukushima Daiichi Unit 2 Extended Report 2015

SimplyInfo.org Fukushima Daiichi Unit 2 Extended Report 2015

SimplyInfo.org Fukushima Daiichi Unit 2 Report 2015 By The SimplyInfo Research Team Dean Wilkie – Author Edano San MD  - Author Peter Melzer PhD – Author Nancy Foust  - Editor February 23, 2015 © 2015 SimplyInfo.org All Rights Reserved. During the early events of the Fukushima Daiichi disaster unit 2 was given little attention in public facing information. It also appears that many of the outcomes from unit 2 may have been credited as being caused by other units a the plant or considered of … Read entire article »

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Fukushima Unit 2 Muon Scan Scheduled For May 2015

Fukushima Unit 2 Muon Scan Scheduled For May 2015

IRID is reporting that the muon scan of unit 2 at Fukushima Daiichi will begin around May 10th of 2015. The scan of unit 1 is scheduled to begin today after equipment was brought on sight and installed earlier in the month. The scans hope to determine if any fuel remains in the reactor vessels. IRID also reports that the consider the combination of the muon scans and the upcoming robot inspections of the containment … Read entire article »

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TEPCO Admits Unit 2 Trench Concrete Work May Be Failing

TEPCO Admits Unit 2 Trench Concrete Work May Be Failing

NHK reports that the work to concrete in the unit 2 trench may not be working as planned. The work so far concreted the tunnels but not the four vertical shafts that go down to the tunnels. When water was pumped out of one of the shafts the water level changed in another shaft. The immediate assumption was that the concrete in the tunnels had gaps. What wasn’t apparently considered was the previous admission by … Read entire article »

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TEPCO’s Trench Saga Could Have Unintended Consequences

TEPCO’s Trench Saga Could Have Unintended Consequences

TEPCO has made multiple attempts to deal with the unit 2 trench full of highly contaminated water. In 2011 they tried to block leaking water in the area. After it was admitted in 2013 that the tunnel still contained highly radioactive water, plans were put in place to empty the tunnel of water. First TEPCO tried to freeze it, then they dumped in ice when the freezing didn’t completely work. The next attempt was to dump … Read entire article »

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TEPCO Declares Effort To Drain Fukushima Daiichi Unit 2 Trench Futile

TEPCO Declares Effort To Drain Fukushima Daiichi Unit 2 Trench Futile

TEPCO drained 200,000 liters of water out of the unit 2 trench after they declared the end near the turbine building to be sealed. After the water level only went down a fraction of the level they assumed it should have, they declared that the water must be coming from somewhere else. Where they don’t seem to know. The new plan is to now fill the trench in with concrete while drawing water out of … Read entire article »

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TEPCO Begins Draining Unit 2 Trench Of Radioactive Water

TEPCO Begins Draining Unit 2 Trench Of Radioactive Water

TEPCO has finally begun draining the Unit 2 trench of highly radioactive water. The trench was found to contain highly radioactive water soon after the initial meltdowns. Some minor effort was made at that time to plug some holes that allowed water to drain into the trench. Since that time nothing was done for years. Only in 2013 when the contaminated water leaks became a political issue did an effort to deal with the water … Read entire article »

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Fukushima Daiichi Updates From IRID Part 1

Fukushima Daiichi Updates From IRID Part 1

IRID released a number of progress updates in recent weeks. In this part we cover what is new information about efforts to reduce radiation levels in the reactor buildings and progress to understand the conditions inside the unit 2 refueling floor. Check back, as we will be doing additional reports as we go through IRID’s updates. Radiation level reduction work: This is the effort using robots to clean and decontaminate the building hallways to allow workers to be in … Read entire article »

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IRID Shows New Robot To Inspect Fukushima Unit 2 Pedestal

IRID Shows New Robot To Inspect Fukushima Unit 2 Pedestal

IRID reports progress on the new robot that will be used to attempt to look inside the reactor pedestal of unit 2 at Fukushima Daiichi. The tiny robot would be fed in through the X6 pipe penetration in the containment vessel wall onto the control rod drive rail and into the pedestal. Earlier investigations into the containment structure of unit 2 showed that the control rod drive rail was missing in the last section as it … 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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What May Be Causing The New Reactor Building Leak At Fukushima Daiichi

What May Be Causing The New Reactor Building Leak At Fukushima Daiichi

TEPCO admitted last week that some subdrain pit wells at the Fukushima Daiichi plant showed a large increase in contamination. These wells were originally a system used to remove groundwater from the reactor building basements, similar to a sump pump system. After the disaster these wells were largely ignored until this year. TEPCO began sampling them and later came up with this idea to pump water out of the subdrain pits, decontaminate it and dump … Read entire article »

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Tsuruga #2 Reactor To Never Restart

Tsuruga #2 Reactor To Never Restart

Japan’s NRA declared that they would not revisit their ruling that the fault under the Tsuruga #2 reactor is active. Japanese law forbids the operation of any nuclear reactor if it sits above an active fault line. Due to this, Tsuruga #2 will not be allowed to restart. The fate of the #1 reactor remains undecided. Reactor #1 is planned for decommissioning in 2016 so it is unlikely they will apply for restart permission. This would leave … Read entire article »

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Fukushima Unit 2 Torus Room Inspection

Fukushima Unit 2 Torus Room Inspection

Hitachi GE conducted robot investigations into unit 2′s torus room on July 17th. The main focus of the work was to look at the pipe penetrations between the torus room wall and the turbine building. The swimming and also the crawling robots did the work together. It was noted that the layer of debris and sediment in the bottom of the torus room caused some problems when the robots kicked up that sediment. Other earlier … Read entire article »

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Fukushima Trench Freezing Failures & Tactics Technical Report

Fukushima Trench Freezing Failures & Tactics Technical Report

Update: Added table of sea water data at the end and another TEPCO handout on the work released this week. TEPCO admitted a few weeks ago to METI that the trench freezing operation underway for units 2 and 3 was not working. TEPCO initially provided few details but did give a detailed report to METI. Today TEPCO released some ideas for how they intend to overcome the problems but didn’t make the details of the problems … Read entire article »

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New Robot Torus Room Inspections Under Preparation In Fukushima Unit 2

New Robot Torus Room Inspections Under Preparation In Fukushima Unit 2

Two newer underwater robots are being used to inspect the torus rooms of units 1 and 2. The robots built by Hitachi/GE are dropped into the torus room in the basement of the reactor buildings through holes cut in the first floor of the buildings. Slightly different locations for the drop hole were used in the two reactor buildings, possibly due to local radiation levels or differences in building design. The swimming robot is equipped with … Read entire article »

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Fukushima Unit 2; 5th Floor Work Progresses.. Sort of.

Fukushima Unit 2; 5th Floor Work Progresses.. Sort of.

TEPCO released some images and information about the work progress on the 5th floor refueling floor of unit 2. This is where the Warrior robot became stranded and had to be abandoned after they were unable to restart it. They have managed to cut down one of the reactor well fences using the Warrior robot. The second fence further across the refueling floor is where Warrior failed. It appears to have hung itself up while cutting … Read entire article »

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Unit 2 Frozen Trench Installation Begins At Fukushima Daiichi

Unit 2 Frozen Trench Installation Begins At Fukushima Daiichi

Work has begun to freeze the unit 2 trench at Fukushima Daiichi. This has been a problematic area since the initial disaster. In early 2011 the trench was found to be leaking highly radioactive water. The effort to freeze the trench is hoped to help block water flow so the trench can be emptied. The existing highly radioactive water will eventually be pumped into the system of storage and water treatment tanks. http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_140328_08-j.pdf This article would not … Read entire article »

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Fukushima Unit 2; Warrior Robot Stranded On Refueling Floor

Fukushima Unit 2; Warrior Robot Stranded On Refueling Floor

The Warrior robot tipped over and remains stranded on the unit 2 refueling floor. The robot was inserted through the now covered blow out panel in the side wall to conduct inspection work towards repair work for the building. The robot depends on a power cable tether to keep it charged. The batteries had discharged and it requires someone to flip a switch on the robot in order to restart it. Due to the high radiation … Read entire article »

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TEPCO Completes Repair Work To Fukushima Unit 1-2 Vent Tower

TEPCO Completes Repair Work To Fukushima Unit 1-2 Vent Tower

TEPCO mentioned, buried in a daily report, that they have been doing work on the unit 1-2 exhaust stack. This is the venting tower that has deadly high radiation at the base and was found to have structural damage in 2013. No further details were mentioned about the work or how it was done.   Machine translation of the statement from TEPCO From the fact that the 24th March, the work of protective measures, such as for falling … Read entire article »

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Fukushima 3rd Anniversary; Technical Report Unit 2

Fukushima 3rd Anniversary; Technical Report Unit 2

These events and new information were found on unit 2 within the last year. TEPCO announced in July that they think there may be leaks in the torus structures of units 1-3. At this point they didn’t identify a specific location on the unit 2 torus as the point of failure. In April 2013 TEPCO sent in robots to inspect the MSIV room of unit 2. This room contains the large valves that open and close … Read entire article »

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Fukushima Unit 2 Loses Reactor Thermometer

Fukushima Unit 2 Loses Reactor Thermometer

Unit 2 at Fukushima Daiichi has lost another bottom thermometer in the reactor vessel. Workers said it short circuited when they were testing it. This leaves one thermometer remaining to estimate temperature in the bottom of the reactor vessel. Accurate temperatures inside unit 2 have been an ongoing problem. UPDATE: TEPCO reports workers short circuited the thermometer when they put the wrong voltage through it. This article would not be possible without the extensive efforts of the SimplyInfo … Read entire article »

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Fukushima Unit 2 Torus Has A Hole In It

Fukushima Unit 2 Torus Has A Hole In It

Kyodo is reporting a 3cm hole in the unit 2 torus. TEPCO claims that water is leaking out through this hole yet the level of water outside the torus tube is higher than the water inside the torus tube based on a recent survey. So far TEPCO has not released a report or video of the new inspection and finding. http://english.kyodonews.jp/news/2014/01/268837.html   This article would not be possible without the extensive efforts of the SimplyInfo research team Join the … Read entire article »

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