Articles Comments

SimplyInfo » Entries tagged with "spent fuel"

TEPCO Outlines Plan To Remove Damaged Fuel At Unit 4

TEPCO Outlines Plan To Remove Damaged Fuel At Unit 4

TEPCO released a short handout this week that explains their plan for removing the damaged fuel at unit 4. One assembly is considerably bent, both the body of the assembly and the lifting handle are damaged. TEPCO cites this as being from a work error before the disaster. Two additional assemblies have known leaks. TEPCO plans to remove the damaged assembly using the overhead crane rather than the refueling crane. This would be a far less precise … Read entire article »

Filed under: The Latest

Unit 5 Fukushima Remains On Shared Cooling, No Repair Stated; July 14, 2014

Unit 5 Fukushima Remains On Shared Cooling, No Repair Stated; July 14, 2014

TEPCO again has posted no information about the needed repair of the spent fuel pool cooling system on unit 5 again today. The reactor and pool remain on shared cooling using the RHR system. While this is keeping both within safe temperatures it is not a situation that should become permanent. Graphs below from hourly data feeds. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at … Read entire article »

Filed under: The Latest

TEPCO Restarts Fukushima Unit 5 Pool Cooling Without Permanent Fix

TEPCO Restarts Fukushima Unit 5 Pool Cooling Without Permanent Fix

TEPCO has announced they have restarted the cooling system for unit 5 just days after stopping it due to a valve body leak. TEPCO mentions in this handout of the restart but there is no permanent fix mentioned as being completed or proposed. Earlier reports said TEPCO would suspend the system until they could determine a permanent fix. Apparently some patch on a cracked valve is now considered a permanent fix. Temps in the spent fuel continue … Read entire article »

Filed under: The Latest

Clock Ticks On Fukushima Unit 5 Cooling Outage As Typhoon Hits Japan

Clock Ticks On Fukushima Unit 5 Cooling Outage As Typhoon Hits Japan

TEPCO reported over the weekend that they found a leak in a valve that is part of the cooling system used for the spent fuel pool of unit 5. The system was stopped as they identified the leak. TEPCO noted they have about 9 days before the spent fuel pool would reach a heat level that they are required to report it to authorities (65 Celsius). The “reactor auxiliary cooling system” was found to have the … Read entire article »

Filed under: The Latest

Fukushima Unit 4 Spent Fuel Removal Suspended For 3 Months

Fukushima Unit 4 Spent Fuel Removal Suspended For 3 Months

TEPCO announced that work to remove spent fuel from the unit 4 fuel pool will be suspended for 3 months. TEPCO claims this is for an annual crane inspection but didn’t state why an annual inspection would take 3 months, 1/4 of a year. As of the work stoppage 1188 spent fuel assemblies have been removed from unit 4′s spent fuel pool.   This article would not be possible without the extensive efforts of the SimplyInfo research … Read entire article »

Filed under: The Latest

TEPCO Submits Plan For Fuel Removal At Unit 3 Fukushima Daiichi

TEPCO submitted plans to the NRA for spent fuel removal from unit 3. This included more detail on how they intend to install a cover and remove transit casks from the building. The defueling building cover bridges the original reactor building, putting the load on the existing scaffolding system and an accessory building. This structure avoids contact with the reactor well, known to have high radiation levels. TEPCO did not mention any measures to prevent radiation issues from the fuel canal between the reactor and the spent fuel pool. They also do not mention anything about worker exposures or how human work would be conducted. Estimated radiation levels in the area are as high as 1 sievert/hour.     The fuel casks would be moved out of the pool to the left side … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 1122 Spent Fuel Assemblies Removed

Fukushima Unit 4; 1122 Spent Fuel Assemblies Removed

There are 411 spent fuel assemblies left to remove from unit 4 at Fukushima Daiichi. 1122 have been removed as of Monday of this week. While this is significant progress, the remaining assemblies include some of the heavily damaged ones that will require careful handling, special equipment and come with huge risks. TEPCO has not specifically outlined the equipment or procedures that will be used to remove the more damaged assemblies in the pool. http://www.tepco.co.jp/en/decommision/index-e.html This article … Read entire article »

Filed under: The Latest

Some Spent Fuel From Fukushima Unit 4 To Be Sent To Unit 6

Some Spent Fuel From Fukushima Unit 4 To Be Sent To Unit 6

TEPCO is asking for permission to make an unusual change to the removal of spent fuel at unit 4. The common pool has been filling up with the offloaded fuel from unit 4. TEPCO claims that they can’t move spent fuel to dry storage casks fast enough claiming a hold up due to waiting on safety approvals of a cask design. TEPCO has been moving some spent fuel from the common pool to the new … Read entire article »

Filed under: The Latest

Fukushima Unit 3 Spent Fuel Pool Debris Removal Progress

Fukushima Unit 3 Spent Fuel Pool Debris Removal Progress

TEPCO has progressed on removing debris from the unit 3 spent fuel pool. The current work is to dismantle the fuel handling crane piece by piece and remove it from the pool. The trolley, main hoist and roof trussing that was above the crane have already been removed. Once the last of the fuel handling crane is removed work will begin to remove debris from the cask handling area of the pool. Cask area debris … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 968 Fuel Assemblies Removed

Fukushima Unit 4; 968 Fuel Assemblies Removed

968 fuel assemblies have been removed from the unit 4 spent fuel pool to the common pool. http://www.tepco.co.jp/en/decommision/index-e.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, please … Read entire article »

Filed under: The Latest

Fukushima Unit 4 Fuel Inspection Shows Some More Damaged

Fukushima Unit 4 Fuel Inspection Shows Some More Damaged

TEPCO released a small selection of images of some of the fuel removed from the unit 4 spent fuel pool. They selected different types of fuel to examine. They provide some contrast to how each fuel type was damaged by the conditions in the pool during the disaster. The 8×8 high burnup fuel appears to have fared the worst with thicker corrosion towards the bottom. The 9×9 and the new type fuel appear to have … Read entire article »

Filed under: The Latest, Uncategorized

Fukushima Unit 4; 814 Spent Fuel Assemblies Removed

Fukushima Unit 4; 814 Spent Fuel Assemblies Removed

814 spent fuel assemblies have been removed from the spent fuel pool of unit 4 to the common pool. Workers have completed 37 cask transfers of fuel from unit 4 to date. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing … Read entire article »

Filed under: The Latest

Fukushima Unit 4 Fuel Removal Hits Half Way Mark

Fukushima Unit 4 Fuel Removal Hits Half Way Mark

Don’t pop the champagne quite yet. Removal of spent fuel from the damaged unit 4 fuel pool has crossed the half way mark. 770 assemblies have been removed, leaving 763 to go. The remaining ones include three known to have been damaged from before the disaster. Those will require special handling and a cask capable of transporting them. Removal of the spent fuel from unit 4 has been an urgent situation since the early days of … Read entire article »

Filed under: The Latest

Fukushima Spent Fuel Progress Report

Fukushima Spent Fuel Progress Report

Spent fuel processing at Fukushima has made some new progress though much work remains with higher risk work being left for later. 47.4% of the spent fuel in unit 4′s spent fuel pool has been removed. This is a positive step towards bringing that unit to a safer state. 48.2% of the temporary cask storage on site has been filled as they remove spent fuel from the common pool to make room. The common pool … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 748 Fuel Assemblies Removed

Fukushima Unit 4; 748 Fuel Assemblies Removed

Unit 4 has had 748 fuel assemblies removed to the common pool as of 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, please let us … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 704 Fuel Assemblies Removed

Fukushima Unit 4; 704 Fuel Assemblies Removed

704 fuel assemblies have been removed from the unit 4 spent fuel pool to the common pool as of this week. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 594 Fuel Assemblies Removed

Fukushima Unit 4; 594 Fuel Assemblies Removed

594 fuel assemblies have been removed to the common pool from unit 4′s spent fuel pool. http://www.tepco.co.jp/en/decommision/index-e.html   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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, please let … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 550 Assemblies Removed

Fukushima Unit 4; 550 Assemblies Removed

TEPCO has removed 550 assemblies from the spent fuel pool to the common pool as of March 31, 2014. http://www.tepco.co.jp/en/decommision/index-e.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be … Read entire article »

Filed under: The Latest

528 Fuel Assemblies Removed At Fukushima Unit 4

528 Fuel Assemblies Removed At Fukushima Unit 4

528 fuel assemblies have been moved to the common pool from unit 4′s spent fuel pool as of yesterday. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be … Read entire article »

Filed under: The Latest

506 Fuel Assemblies Removed Fukushima Unit 4

506 Fuel Assemblies Removed Fukushima Unit 4

506 fuel assemblies have been removed from the spent fuel pool at unit 4 to the common pool. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 374 Fuel Assemblies Removed

Fukushima Unit 4; 374 Fuel Assemblies Removed

374 fuel assemblies have been moved from unit 4′s spent fuel pool to the common pool as of this week. http://www.tepco.co.jp/en/decommision/index-e.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 352 Fuel Assemblies Removed

Fukushima Unit 4; 352 Fuel Assemblies Removed

TEPCO reports a total of 352 fuel assemblies have been removed from the unit 4 spent fuel pool as of Monday February 17, 2014. http://www.tepco.co.jp/en/decommision/index-e.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org … Read entire article »

Filed under: The Latest

Fukushima Unit 4; 308 Fuel Assemblies Removed

Fukushima Unit 4; 308 Fuel Assemblies Removed

308 assemblies have been removed from the unit 4 spent fuel pool. The assemblies were transferred to the common pool last week. http://www.tepco.co.jp/nu/fukushima-np/removal4u/index-j.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) … Read entire article »

Filed under: The Latest

Fukushima Unit 3 Spent Fuel Pool Debris Removal Update

Fukushima Unit 3 Spent Fuel Pool Debris Removal Update

METI has reported some progress and a plan for removing debris out of the unit 3 spent fuel pool. Initial work already in progress includes removal of the steel pool cover and then any rebar than can easily be removed, this work is already underway. Then work will progress in this order: 1.(④, ⑤, ⑥, ⑦) removal mast , roof truss material 2 . Removal of FHM (fuel handling machine) (⑧) 3 . Removal of FHM west end … Read entire article »

Filed under: The Latest

Fukushima Fuel Inventory Update; February 4, 2014

Fukushima Fuel Inventory Update; February 4, 2014

The cask storage facility at the seafront is now completely empty, all casks have been moved. This building will likely no longer be used. The common pool is now 82.5% full with 5643 fuel assemblies stored in the pool. Temporary cask storage is 43.5% full with 1274 fuel assemblies stored there. Unit 4 is down to 1401 assemblies remaining in the pool. http://www.meti.go.jp/earthquake/nuclear/pdf/131226/131226_01dd.pdf This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation … Read entire article »

Filed under: The Latest

New Fuel Damage Found At Fukushima Unit 4

New Fuel Damage Found At Fukushima Unit 4

TEPCO did inspections on a damaged fuel assembly in the unit 4 spent fuel pool. The series of videos showed extensive damage. Photos and videos below. TEPCO does not indicate where within the pool this assembly was selected from. http://photo.tepco.co.jp/date/2014/201401-j/140130-01j.html TEPCO recently released 5 videos of the condition of fuel assemblies which were transferred to the common pool. Each of the videos examined the external latch, fuel assembly container outer surface and bottom on one side of … Read entire article »

Filed under: The Latest

264 Fuel Assemblies Removed At Fukushima Unit 4

264 Fuel Assemblies Removed At Fukushima Unit 4

264 fuel assemblies have been removed to the common pool from unit 4. http://www.tepco.co.jp/en/nu/fukushima-np/removal4u/index-e.html 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, please let us know. If … Read entire article »

Filed under: The Latest

Fukushima Unit 2 Fuel Removal Exploration Begins Next Week

Fukushima Unit 2 Fuel Removal Exploration Begins Next Week

TEPCO announced they will begin work to explore the best method to remove spent fuel from unit 2. Since the radiation levels on the refueling floor are so high that workers can not enter they have devised an interesting method to work in the unit. Robots will be sent into the building using the blow out panel access on the 5th floor. Periscope type cameras will be inserted through the roof to allow workers to see … Read entire article »

Filed under: The Latest

176 Fuel Assemblies Removed From Unit 4 Fukushima Daiichi

176 Fuel Assemblies Removed From Unit 4 Fukushima Daiichi

TEPCO’s weekly update on fuel removed from Unit 4′s spent fuel pool now sits at 176 spent assemblies removed from the reactor pool to the common pool. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website … Read entire article »

Filed under: The Latest

Unit 4 Spent Fuel Transfers Now At 154 Assemblies

Unit 4 Spent Fuel Transfers Now At 154 Assemblies

TEPCO announced another transfer of spent fuel from unit 4 to the common pool. The work would have taken place last week. 154 fuel assemblies have been transferred to the common pool to date. 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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you … Read entire article »

Filed under: The Latest

Fukushima Daiichi Fuel Storage Locations Updated

Fukushima Daiichi Fuel Storage Locations Updated

As part of the larger roadmap document TEPCO has reported some major changes in the location of spent fuel around the plant. The cask storage building on the sea front now has no casks stored inside. At the time of the tsunami there were a number of casks inside the building. TEPCO now records there to be 0 casks in that building. The temporary cask storage facility on the hill has increased inventory considerably. A total of 1274 … Read entire article »

Filed under: The Latest

Spent Fuel Moved At Unit 4, 88 Total Removed

Spent Fuel Moved At Unit 4, 88 Total Removed

Another cask of spent fuel has been transferred to the common pool from unit 4 at Fukushima Daiichi. This makes a total of 88 assemblies removed from the pool. This was reported December 18th, 2013 JST by TEPCO. 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 cited, quoted etc. from other sources is under the respective rights of that content … Read entire article »

Filed under: The Latest

Another Load Of Spent Fuel Moved At Fukushima Daiichi

Another Load Of Spent Fuel Moved At Fukushima Daiichi

TEPCO has moved another load of spent fuel from unit 4 to the common pool. After the initial fuel transfers TEPCO ceased reporting each fuel move and now only updates the plant update page. The new load was announced December 9, 2013. 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 cited, quoted etc. from other sources is under the … Read entire article »

Filed under: The Latest

Second Set Of Unit 4 Fuel Loaded In Common Pool

Second Set Of Unit 4 Fuel Loaded In Common Pool

TEPCO reports as of November 30, 2013 JST the second set of 22 fuel assemblies were loaded into the fuel racks of the common pool. The work was completed about 5pm JST according to NHK. NHK also reports that TEPCO will now give spent fuel priority for removal over the unused assemblies in the pool. 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 … Read entire article »

Filed under: The Latest

Unit 3 Spent Fuel Pool; Debris Removal Preparation Begins

Unit 3 Spent Fuel Pool; Debris Removal Preparation Begins

Kyodo News announced yesterday that preparations are underway to remove the debris from the unit 3 spent fuel pool at Fukushima Daiichi. The debris in unit 3′s spent fuel pool is much more excessive and complicated than unit 4. In unit 3′s pool is a tangle of rebar and concrete along with the refueling crane. The refueling crane apparently fell in the pool during the explosion. One end landed on the fuel racks. Along with the … Read entire article »

Filed under: The Latest

2nd Fuel Transfer From Unit 4 Completed

2nd Fuel Transfer From Unit 4 Completed

TEPCO has removed another cask from unit 4 and transported it to the common pool on November 29th JST. Kyodo News flew their helicopter over the plant in defiance of TEPCO’s claim these fuel transfers can not be photographed. This is the second cask transfer to take place from unit 4. The first one moved unused fuel assemblies. The second transfer removed spent fuel from the pool.   This article would not be possible without the extensive … Read entire article »

Filed under: The Latest

Unit 4 Cask Filled, Transit Prep Tomorrow 11.27.13

Unit 4 Cask Filled, Transit Prep Tomorrow 11.27.13

TEPCO announced an additional 16 spent fuel assemblies were loaded into the transport cask by the end of the day filling the cask with a total of 22 assemblies. 6 assemblies were previously loaded in the morning. Tomorrow will be cleaning and preparation of the cask for transport to the common storage pool. TEPCO is not declaring the transit date or time to avoid having the cask filmed claiming nuclear security concerns. http://www.tepco.co.jp/cc/press/2013/1232487_5117.html This article would not … Read entire article »

Filed under: The Latest

Unit 4 Fuel Removal Work Begins For Wednesday

Unit 4 Fuel Removal Work Begins For Wednesday

TEPCO announced work to begin taking out spent fuel at unit 4 resumed this Wednesday morning JST. http://www.tepco.co.jp/cc/press/2013/1232461_5117.html   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 cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than www.simplyinfo.org (or www.fukuleaks.org) it may be plagiarized, please let … Read entire article »

Filed under: The Latest

Unit 4 Fuel Removal Resumes Tuesday

Unit 4 Fuel Removal Resumes Tuesday

NHK is reporting that TEPCO will continue the process to remove spent fuel from the unit 4 pool on Tuesday JST. The first run removed unused fuel and transferred it to the common pool nearby. This next effort will try to remove a group of spent fuel assemblies and transfer them to the common pool using the same process. TEPCO cited problems with sand and sediment in the spent fuel pool causing visibility issues and will … Read entire article »

Filed under: The Latest

Unit 4 Fuel Unloaded Into Common Pool; Video & Photos

Unit 4 Fuel Unloaded Into Common Pool; Video & Photos

TEPCO announced they have removed the first load of fuel from unit 4 to the racks in the common pool. NHK reports the work was completed by the end of the day Friday. This process will have to be repeated 70 times to fully unload the pool at unit 4. Video of the process can be viewed on our YouTube channel http://youtu.be/paIoQkO2WpE Large format photos from the work can be found here http://www.flickr.com/photos/simplyinfo/10994784153/   This article would not be possible without … Read entire article »

Filed under: The Latest