March 22nd, 2011 – Source terms and doses exceeding PAGs – Drywell reading source terms
Pages From ML12096A069 – March 22nd, 2011 – Source Terms and Doses Exceeding PAGs – Drywell Reading Source …
Tag: Reactor 2
Delayed use of seawater to cool the Fukushima Daiichi Unit 2 reactor may have ensured meltdown
In its final report, TEPCO concluded that Fukushima Daiichi plant manager Masao Yoshida and other utility executives, including those at headquarters, carried out the seawater injection following appropriate procedures and didn’t delay the exercise. In video footage recently released by the utility, conversations are documented where TEPCO staff in Tokyo request staff to delay the […]
March 26th, 2011 – Unit 2 thought to have a leak/break providing a connection between the torus and the primary containment
From: Holdren, John P. 4(b)(6) To: Richard L Garwin ; Kelly, John E (NE) Cc: Poneman, Daniel; Lyons, Peter; SCHU; Binkley, Steve; Fetter, Steve 1(b)(6) Sent: Sat Mar 26 11:29:30 2011 Subject: RE: Flooding containment to submerge lower part of the RPVs. Adding Fetter… Dick – My understanding is that this flooding of the primary […]
April 4th, 2011 – Water with dose rate of more than 1000 mSv/hr confirmed leaking directly into the sea
NISA press release from April 2, mentioned that water with dose rate of more than 1000 mSv/hr (100 rem/hr) was confirmed by TEPCO at around 3:20 UTC on April 2 inside the cable storage pit located next to Unit 2 discharge point. There exists a crack of approximately 20 cm on the sidewall of the pit closest to the […]
March 22, 2011 – Summary of phone call between PMT and NEI (930AM – 948AM)
Summary of phone call between PMT and NEI (March 22, 2011; 9:30AM – 9:48AM) NEI Attendees: Ellen Anderson (exa(bnei.org) (leader) Jamie Mallon Graham Johnson Others (complete list to be emailed by NEI to [email protected]) NRC attendees: John Lubinski Kathryn Brock Bruce Watson In response to NEI’s questions on the assumptions the NRC used for the […]
March 28th, 2011 – The consensus view on the recommendation of not flooding the drywell – Units 2 and 3 are well vented already due to failed containments
Subject: Re: Info from science group call Date: Tuesday, March 29, 2011 4:43:39 PM Agree, the two issues steam condensing causing h2 explosive mixture and and loss of the vent path are both in the RST document: inert by purging and vent; don’t fill beyond the vent. The issue is without level indication you may lose […]
TEPCO’s do or die mission to save nuclear reactor may have caused largest radiation leaks during Fukushima disaster
Researchers from the University of Tokyo, the Japan Atomic Energy Agency and other experts have examined the crisis response log from the Fukushima Daiichi nuclear disaster. They also checked radiation levels in surrounding areas, namely the radiation data from the Fukushima Daini plant 10 kilometers south of the Daiichi plant. They found that workers attempts […]
April 15th, 2011 – GE Hitachi Nuclear Response Team (GE Power & Water) assessment of the existence of a vessel breach on Fukushima U2
From: RST01 Hoc Sent: Friday, April 15, 2011 9:16 PM To: OST01 HOC Subject: FW: GEH Nuclear Response Team Response In reference to Task 4706, the task is complete. The GEH assessment of the existence of a vessel breach on Fukushima U2 is complete. The documentation is confidential GEH information. The NRC is reviewing the results of […]
TEPCO sends robot into Fukushima Daiichi Reactor 2 Torus Room – Finds high radiation levels but no signs of leaks
TEPCO released photos of two manhole covers in the Torus room of Fukushima Daiichi Reactor 2. The robot was sent to inspect the catwalk near the inspection manholes attempting to locate any signs of damage and collect radiation readings. The highest levels registered by the robot on the investigation on the 18th, was 120 millisierverts […]
April 19th, 2011 – TEPCO concerned radioactive water leaking into Unit 2 from Unit 1 or Unit 3 possibly due to open PCV isolation valves
From: OST01 HOC Sent: Tuesday, April 19, 2011 1:26 PM To: Hiland, Patrick; RST01 Hoc; Skeen, David Subject: ACTION – New Ticket for Japanese Event Task Tracking (JETT) Process The Operations Center has identified a task that falls in the purview of the Line Organization. You were provided as a POC for NRR Question to be […]
Photos show effects of meltdown during Fukushima Daiichi Reactor 2 Endoscopy Investigation
Date: From 9:30 to 10:30, March 27 (Tue), 2012 Technical support: Toshiba Number of workers: TEPCO: 19, Toshiba: 16 Maximum exposure dose: 1.69mSv/person・day Result of the dose measurement in the second investigation inside of Primary Containment Vessel, Unit 2,Fukushima Daiichi Nuclear Power Plant Measurement A – 39 Sv/h Measurement B – 54.1 Sv/h Measurement C […]
TEPCO releases video of second day of containment inspection – Melted fuel still unlocated
TEPCO has released video footage of the second day of inspections inside of the Reactor 2 containment vessel where fatal radiation levels and a lack of accumulated water have brought more questions about the state and location of the melted nuclear fuel. Clouds of steam and dripping moisture still obscure much of the containment from […]
TEPCO completes first day of endoscope mission into Fukushima Daiichi Reactor 2
Tokyo Electric Power Company have begun a 2-day endoscopic examination of the inside of a damaged reactor at the Fukushima Daiichi nuclear plant. TEPCO says through the operation it wants to confirm that the amount of fuel that melted and fell to the bottom of the containment vessels is being cooled properly. In January TEPCO […]
TEPCO removes more faulty thermometers from monitoring at Fukushima Daiichi Units 1 and 2
TEPCO has stopped monitoring two more thermometers at the crippled Fukushima nuclear plant. In Unit 1, TEPCO admitted that one of the thermometers measuring the reactor vessel temperatures has been found to be inoperable due to a wiring mistake over 10 years old. The faulty wire connections were made 11 years ago, and during a […]
Worker investigation of Torus Room of Fukushima Daiichi Reactor 2
2012.3.16 Preliminary survey in Torus Room of Units 2 and 3, Fukushima Daiichi NPS (2) Unit2 NW (1) (pictured on March 14, 2012) Unit2 NW (2) (pictured on March 14, 2012) Unit2 NW (3) (pictured on March 14, 2012) Unit2 NW (4) (pictured on March 14, 2012) Unit2 NW (5) (pictured on March 14, 2012) Unit2 NE (1) (pictured on March […]
Workers at Fukushima Daiichi enter Reactors 2 and 3 to investigate suppression chambers
TEPCO sent workers into the basements of Fukushima Daiichi Units 2 and 3 for the first time after the accident on Wednesday to investigate the pressure suppression chamber near the bottom of the containment vessel Upon opening the suppression chamber entrance door in Unit 2, workers measured over 160 mSV/hr. In Unit 3, the suppression […]
December 03, 2011- TEPCO Fukushima Dose rate in the building space
December 03, 2011Dose rate in the building space (1.64MB) [toggle_simple title=”Related articles” width=”600″] Related articles Is the main stream media able to report on a nuclear accident? (enformable.com) TEPCO denies reports to decommission Fukushima Daiichi Units 5 and 6 (enformable.com) TEPCO Begins Use of Robots to Assist Clearing 3500 Cubic Meters of Building Rubble from […]