TEPCO still unable to restore power at all affected facilities
Monday night, a power outage at the Main Anti-Earthquake Building at the Fukushima Daiichi nuclear power station suspended operations at three spent fuel pool cooling systems and other critical plant facilities. TEPCO was…
NHK reporters visit Fukushima Daiichi plant
Reporters from NHK were allowed to walk near the Fukushima Daiichi Unit 1 reactor building for 10 minutes on Tuesday, which was practically destroyed by an explosion in the first hours of the…
TEPCO workers collect water from Fukushima Daiichi Reactor 1 torus room
According to TEPCO, twenty workers at Fukushima Daiichi spent two and a half hours in the Unit 1 reactor building collecting water and sediment for sampling analysis from the accumulated water in the…
TEPCO workers survey Fukushima Daiichi Unit 1 torus room
This week, twenty workers at Fukushima Daiichi worked to investigate the torus room inside of the Unit 1 reactor building. They found that the top of the water is around OP 3700, which…
TEPCO finds high radiation levels in Fukushima Daiichi Unit 1 torus
TEPCO workers carried out efforts at the Fukushima Daiichi Unit 1 reactor to drill a hole through the concrete containment and steel containment liner in order to insert a camera to investigate where…
TEPCO releases trove of images taken during early days of Fukushima Daiichi disaster
Today, TEPCO published nearly two thousand photos of the first weeks of the response to the Fukushima Daiichi nuclear disaster. During the early days of the accident workers were temporarily evacuated multiple times…
TEPCO workers launch survey balloon in Fukushima Reactor 1
Photos showed debris from the reactor building explosion up to about 30 meters inside of the building. Radiation levels measured 150 mSv/hr on the building’s second floor, but dropped dramatically on the third…
TEPCO finds only 9 feet of water at bottom of containment vessel
In the first week of the crisis, Fukushima Daiichi Reactor 1 is considered to have had the most severe situation of the three reactors which ultimately suffered meltdowns. To date, none of TEPCO’s…
TEPCO’s lack of findings during Reactor 1 endoscope mission may cast doubt on cold shutdown status
In January of this year, TEPCO conducted an investigation in the inside of the Primary Containment Vessel (PCV), of Unit 2 at Fukushima Daiichi. They had been assuming that the water in the…
March 12th, 2011 – They may have done exactly what Mitch said – flooded the cavity and then they got a steam explosion
From: Gayrilas, Mirela To: Gibson. Kathy; Case, Michael Cc: Lee. Richard Subject: FW: Fukushima Date: Saturday, March 12, 2011 6:55:30 AM Any info that can be shared with our contractor at ANL? He…
In-Focus Japan: 1590 microsieverts per hour detected in Futaba just before Unit 1 explosion – More utilities seeking rate increases
1590 microsieverts per hour detected in Futaba just before Unit 1 explosion on March 12th The 1590 uSv/hr measurement was observed at 15:00 on March 12th after venting to reduce the pressure levels…
Fukushima Daiichi Unit 1 – March 12th, 2011 – After Explosion Destroyed the Reactor Building
At 15:36 JST on 12 March, there was an explosion in the reactor building at Unit 1 while employees and the contracted workers who were engaged in the water injection work were outside…
Many difficulties lie ahead in decommissioning work after the Fukushima Daiichi nuclear disaster
One and a half years after the March 11th disaster at Fukushima, workers on-site face immense difficulties in decommissioning work at the crippled nuclear power plant. The utility now admits that the explosion…
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 …
March 20th, 2011 – After Unit 3 explosion people working outside for 15-30 minutes later show radiation levels of more than 10 mSv
From: PMT03 Hoc Sent: Sunday, March 20, 2011 5:26 PM To: Hoc, PMT12; PMT07 Hoc Subject: RE: Utube video of workers Fukushima Daiichi Worker Interviews Source: NHK World (www.youtube.com/watch?v=qc3BKldg3-c) Received from ET02 at…
TEPCO’s balloon mission in Fukushima Daiichi Reactor 1 unable to be carried out
On Wednesday, 5 TEPCO workers and 14 subcontract workers attempted to carry out an investigation of the Reactor 1 operating floor in order to assess the current conditions an gain any insights into…
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…
April 3rd, 2011 – Has the suspected Unit 1 primary containment leakage been factored into the assumptions and subsequent recommendations
From: E.Bradley@iaeaorg Sent: Sunday: April 03, 2011 7:41 AM To: Scott, Michael; [email protected] Cc: Casto, Chuck; N [email protected]; K.Yamada@iaea org Subject: RE: Supplemental Information on Venting Rev 6 Mike, Would you also provide…
March 25th, 2011 – Presentation from Japan Nuclear Technology invokes questions about official analysis of Reactor 4 explosion
By March 25th, two weeks after the March 11th nuclear disaster in Japan, officials at the Nuclear Regulatory Commission were passing around an emergency estimation of what could potentially by happening inside of…
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