SimplyInfo » Entries tagged with "unit 4"
TEPCO Finishes Defueling Building On Unit 4, Plans To Remove Fuel In June
[Translate] TEPCO has announced the completion of the frame for the unit 4 defueling building. The handout shows at least some of the outer steel skin is also installed. TEPCO also made the unusual statement that they would begin removing fuel next month. That may be premature as the overhead cranes still need to be installed and the process for fuel removal tested. Concerns about the defueling building and the spent fuel pool’s ability to bear the weight of the fuel casks remains a worry that TEPCO has yet to publicly address. A typical spent fuel cask weighs 25 tons Unit4_DefuelingBuilding_handouts_130529_08-e. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors … Read entire article »
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Current Challenges & Progress At Fukushima Daiichi
[Translate] TEPCO’s testing of the ALPS system intended to remove all contamination except tritium continues but now it is not expected to be out of the testing phase until fall 2013 at the earliest. TEPCO also admitted that the system is not completely removing contaminants as expected and the radiation levels around the equipment was rising. Right now neither issue was halting work but could become a problem over time if not resolved. This throws a huge problem into the contaminated water problems. TEPCO currently has no plan do deal with this issue. They have begun building more tanks on site and still hope to use the groundwater bypass system but that has not been approved or fully implemented. The radiation increases around ALPS could cause a bigger problem down the road if the … Read entire article »
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Public Spin On Fukushima Coming Undone
[Translate] TEPCO’s efforts to avoid outside inspections of the unit 1 reactor have caught up with them. After it was recently pointed out to the Diet that TEPCO had lied to the investigation committee last year in an effort to avoid an inspection, now it appears one is pending. The Diet has asked the new nuclear regulator to conduct an inspection of the isolation condenser system in unit 1 and they appear ready to do so: “If the condensers are found to show damage consistent with shaking in an earthquake there would be case for higher standards in nuclear plant design—with important implications for existing reactors built to lesser tolerances. But the Nuclear Regulation Authority chairman warned against premature conclusions. “We will not pre-judge the investigation,” Tanaka said. He added that an investigation … Read entire article »
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New Paper: Gamma Radiation Damage To Fukushima Units 1- 4 Spent Fuel Pools
[Translate] SimplyInfo.org has released another new paper taking an in depth look into the ongoing challenges at the Fukushima Daiichi nuclear plant. This new work investigates the technical issues involved with the ongoing degradation of the spent fuel pools. Gamma radiation is an ongoing problem for the steel and concrete that composes the spent fuel pools. Aspects of the disaster have drastically changed that damage mechansim. The paper can be found online and also in PDF format for download or reading on book readers. Gamma Radiation Damage To Fukushima Units 1- 4 Spent Fuel Pools http://www.simplyinfo.org/?page_id=9353 This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced … Read entire article »
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SimplyInfo.org Releases New Paper On Unit 4 Explosion
[Translate] Our ongoing research of the disaster at Fukushima Daiichi has found some additional insight into the explosion events at unit 4 Fukushima Daiichi. Initial reporting on the cause of the explosion varied and were never investigated further by TEPCO. Additional new data has caused reassessment of this event. Our review of the new data can be found here: Paper: Causes Of Unit 4 Explosion Revisited http://www.simplyinfo.org/?page_id=9326 This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with limited permission. While we welcome the sharing of information or promoting our work, please do so with respect to the large amount of effort and time that goes into our … Read entire article »
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Unit 4 Cover Building Construction Progress
[Translate] TEPCO released a brief handout and photo showing the progress made so far in constructing the cover building at unit 4. Once completed the building will allow the spent fuel pool to be unloaded. U4coverconstruction_handouts_130115_01-e This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with limited permission. While we welcome the sharing of information or promoting our work, please do so with respect to the large amount of effort and time that goes into our research and analysis. Referring to something or a quote is great, copying it all or in substantial parts is not so great. If you wish to reproduce … Read entire article »
Filed under: Reactor 4, The Latest
Unit 4 Cover Building Columns To Begin Installation
[Translate] Worker Happy, mentions that the installation of the cover building columns is beginning at Fukushima Daiichi. (machine translation) “Could they also blur Tsu, sleep early Nakya out with sleepiness (-o-;) song was also sleeping until now eat pudding..Oh, today I have assembled a huge steel columns of the cover Unit 4. I wonder if tomorrow than today … Sabui.I at I on. Link TEPCO has also released some photos on the work today. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with limited permission. While we welcome the sharing of information or promoting our work, please do so with respect to … Read entire article »
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New Paper Explains Spent Fuel Element Power At Fukushima
[Translate] In the new paper “Lifting Fuel Elements Out Of The Fukushima Daiichi Spent Fuel Pools” Dean Wilkie and the SimplyInfo research team look at the condition of the spent fuel rods in the pools at Fukushima Daiichi. One of the critical factors of concern with the pools and specifically unit 4 has been the power level decay of the fuel assemblies. This new paper takes a technical look at the spent fuel and how the time since removal from the reactor plays a part in the need for removing fuel in a timely manner. Read the entire paper here. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors … Read entire article »
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Worker Breaks Leg At Daiichi
[Translate] Workers are reporting that at least one worker was injured in the turbine building of unit 4 at Fukushima Daiichi. Details about what led to the injury were not available and TEPCO has not reported the incident yet. Machine translation: Happy113114:45 am via Keitai Web I was cold in the morning today (^ O ^), the scene was surprisingly warm and easy to work っ now. Location of water leakage Sally yesterday, I was not doing anything today. Maybe in the building is to investigate various … and cause. People were injured in the turbine No. 4 came out today was like after. But it seems like … a broken leg. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be … Read entire article »
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Unit 3 SFP Inspection, Reactor Cap Removed At Unit 4
[Translate] TEPCO has been progressing on work at Fukushima Daiichi to deal with units 3 and 4. The reactor (RPV) cap was removed from the top of unit 4. It appears TEPCO has removed all of the large heavy gear that had been sitting on the top west floor of the damaged reactor building. This removal should help with building stability. This image shows the yellow containment cap, tool pit crane,all of the concrete reactor well plug and the reactor cap have been removed. More images of unit 4′s work can be found in our photo gallery here. The TEPCO handout on the work: handouts_120913_03-e Work at unit 3 involved looking into the spent fuel pool as they prepare to begin removing debris from what is left of the refueling deck. Most of the images were looking … Read entire article »
Filed under: Reactor 3, Reactor 4, The Latest
TEPCO Soundness Report On Unit 4 Admits Larger Failures
[Translate] TEPCO released two reports in Japanese last week on order of NISA to explain the soundness of unit 4. Our rough machine translation is available here. The two extensive reports in Japanese were not made available in English. TEPCO has made an abbreviated version available today in English that omits or abbreviates a large amount of very critical information including the seismic statements and floor damage report details among others. TEPCO also released another document in Japanese late last week that has more data on the seismic determinations but was less publicized to the press and the public. In May 2012 we reviewed TEPCO’s available documents on unit 4′s stability and explained them in detail here, and a July 2012 follow up. There are some very critical new admissions from TEPCO in the August … Read entire article »
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TEPCO’s Photo Failure Gets “Better”
[Translate] TEPCO’s public image management took itself to laughable heights when they released this horribly photoshopped image on August 30th. Our documentation shows that the area they so poorly attempted to block out is the garage doorway. This has raised suspicions about why they are trying to block this view from the public. TEPCO then outdid themselves with a new solution to their Photoshop woes. They re-released the image & the handout announcing a correction! This is the correction announcement: “We had fabricated a part of the photo in terms of physical protection. We replaced the photo of which the fabrication may be taken in appropriate. （September 4, 2012)” TEPCO’s English translations have also recently changed, as if someone new is doing them and doing them not nearly as well as they had been done in the … Read entire article »
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A Curious Edit By TEPCO On Unit 4
[Translate] This photo by TEPCO was spotted with a very poor quality attempt to block out part of the photo. The original can still be found on TEPCO’s site here. Why TEPCO would edit out this portion of the building is both perplexing and raises suspicions about what they are attempting to hide from the public. Our photo records show the location to be the garage doorway of the building. The original long garage stall that was attached to the building was blown out by the blast at unit 4. The broken garage stall was later removed. In the edited photo the recently installed outside elevator can be seen off to the right. The location of the garage doorway can be identified by simply counting the upright gridwork of the building frame. The garage … Read entire article »
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Unit 4 Removed Fuel Inspection Results
[Translate] TEPCO has released more information about the unused fuel removed from the Unit 4 spent fuel pool. TEPCO remarked that there was rust on the surface of the fuel rods but claims no corrosion or damage was apparent. TEPCO stated yesterday that they intend to inspect the fuel pellets inside the rods soon. Some comments from Dean (paraphrased): 1. The discoloration on the new elements which have been stored in the SFP (spent fuel pool) is not normal for a new element and I don’t think it was caused by the new fuel pellets located inside those tubes, although they have not as of yet taken any pellets out of the tubes. 2. My guess is that the changing water chemistry which has occurred over the time since the explosions and the introduction of so … Read entire article »
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Unit 4 Fuel Assembly Inspection
[Translate] TEPCO released some photos and a short handout on the inspection of the unused fuel assemblies today. The handout made no real mention about the condition of the fuel assemblies. An NHK report says they found no damage or change in rod shape. The report says TEPCO will check the pellets inside in a few days. Some debris that appears to be concrete rubble was found in the fuel assembly. TEPCO report in English handouts_120828_01-e This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with limited permission. While we welcome the sharing of information or promoting our work, please do so with respect … Read entire article »
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Fuel Assembly Removed From Daiichi Unit 4 Fuel Pool
[Translate] TEPCO has removed the first unused fuel assembly. Kyodo reported it about 8 hours ago. The second assembly should be moved on the 19th JST. From tweets by worker at Daiichi, Happy11311, conditions at the plant have been extremely hot in recent days. The unused assemblies will be transported by cask to the common pool for inspection for corrosion to give an idea about conditions in the pool. This should help workers determine a plan for eventually removing all the fuel. (photo via Ex-SKF) This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with limited permission. While we welcome the sharing … Read entire article »
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Fukushima Daiichi Unit 4, Unaddressed Risks
[Translate] TEPCO released a handout showing that debris and the upper walls has been removed from unit 4. The report also states that they will leave the large equipment on the refueling deck until October 2012 when they begin installation of the new cover building. TEPCO to date has given no explanation for not removing these objects from the refueling floor in a timely manner. This section of the reactor building has visible damage and is the wall section known to be gradually leaning and bowing out of alignment. Previous reports admit that the west section of the refueling floor is assumed to be structurally damaged. The area under and towards the mid-line of the yellow containment cap shows to be damaged. Both the floor and the west wall have documented damage. … Read entire article »
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Unit 4 Demolition Progress, New Damage Found
[Translate] We caught the TBS camera yesterday cutting away wall sections on unit 4. A cloud of concrete dust can be seen in some images. The yellow containment cap still sits on the west side of the building on the refueling floor. TEPCO’s recent report also found new damage to the west wall of unit 4. They claim there isn’t any cracking or degradation of the concrete even with considerable distortion to the wall. floors 1-3 from the bottom up. The number show is the distortion in millimeters. 3rd floor distortion from the previous report. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here with … Read entire article »
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New Photos Of Unit 4, Reactor Cap Found
[Translate] TEPCO was kind enough to post some high resolution images of unit 4 from the recent press event. These included some good views of unit 4. From those images we were able to pull out some new details. The workers have done an incredible amount of work on unit 4 in recent months to prepare for the add on building that will allow fuel to be removed. Amid the concerns about the stability of unit 4, the extensive and complicated work being done on a daily basis has sometimes been missed. Details with each image. You can see all the new images including photos from around the nuclear plant at our Flickr Page. Images can be reused, please leave any watermarks in place and a link back here would be appreciated. South wall … Read entire article »
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TEPCO Talking In Circles About Unit 4
[Translate] TEPCO has released yet another document on unit 4. Sadly, it contains no new information. The 19 page document repeats the same information and statements as previous reports given to the press. TEPCO still fails to release survey work data and non-destructive concrete testing data. They also continue to ignore questions about the crack in the south side facade. The hand out has a list of links on the last page but the cited documents are all known documents that do not contain any new information and do not answer the public’s concerns. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content may also be copyright of other specific original authors or creators and was reproduced here … Read entire article »
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