Fukushima thread for the next few days.....
Tepco just flipping and pulling levers - pushing buttons and praying something works for awhile , no clue as to what they're doing.....
Iori Mochizuki
Radiation level in leakage detector hole water of reservoir No.3 jumped up 5 times much
Posted by Mochizuki on May 15th, 2013 · 1 Comment
About the major leakage of highly contaminated water, Tepco has admitted 3 of 7 reservoirs are leaking.
According to Tepco, the total β nuclide in leakage detector hole water jumped up in reservoir No.3.
It means the highly contaminated water is possibly penetrating the leakage isolation sheet but not reaching outside of the reservoir yet. At the moment of 16:00 5/15/2013, 8,414 m3 of contaminated water is still stocked in reservoir No.3.
(Southwest side)
5/13/2013 : 41,000,000 Bq/m3
5/14/2013 : 200,000,000 Bq/m3
Reactor1 reaching 49℃, increased by 3℃ within 24 hours
Posted by Mochizuki on May 15th, 2013 · No Comments
On 5/14/2013, Fukushima Diary reported ”3 thermometers indicating the rapid increase of temperature in reactor1 [URL]”
One of the thermometers indicated the temperature of PCV reached 49℃ at 11:00 of 5/15/2013.
It increased by 3℃ since 11:00 of 5/14/2013.
The increase of temperature indicated by these three thermometers is accelerating. There is no official explanation of Tepco.
[Reactor2] Air pressure of Suppression Chamber was lower than Dry Well, “can’t purge hydrogen gas”
Posted by Mochizuki on May 15th, 2013 · No Comments
On 5/13/2013, Fukushima Diary reported “Tepco to start nitrogen gas injection into reactor2 for the first time, “Not knowing the hydrogen gas concentration” [URL]”
Tepco is attempting purging hydrogen gas out of Suppression chamber. This is the first nitrogen gas injection into reactor2.
However, they cannot purge hydrogen gas, which may cause hydrogen gas explosion, from Suppression chamber to Dry well according to Tepco.
The air pressure of Dry well is higher than Suppression chamber. In order to increase the pressure in Suppression chamber, Tepco is going to double the nitrogen gas amount to inject into Suppression chamber. (5Nm3/h → 10Nm3/h)
This accident proved Tepco does not know the state of the inside of reactor2.
Tepco just flipping and pulling levers - pushing buttons and praying something works for awhile , no clue as to what they're doing.....
3 thermometers indicating the rapid increase of temperature in reactor1
Posted by Mochizuki on May 14th, 2013 · No Comments
On 5/11/2013, Fukushima Diary reported “A thermometer in reactor1 indicating temperature unusually increasing “2℃ in 4 days” [URL]”
Since 5/13/2013, two more thermometers have been indicating the rapid increase of temperature as well.
In total, three thermometers are indicating the temperature increase.
They are installed in the upper part of PCV of reactor1. Other thermometers are not showing any significant change in temperature.
↓ The location of the thermometers
Radioactivity density in reactor1 sub-drain has been stably high since late Feb 2013
Posted by Mochizuki on May 14th, 2013 · No Comments
According to Tepco, the radioactivity density of reactor1 sub-drain increased in the end of February 2013, and it hasn’t been decreasing until 5/14/2013.
Usually they pump up the ground water from sub-drain to reduce the buoyancy against the reactor building. Reactor1 and 2 have 27 sub-drains in total.
However, since 311, they cannot use sub-drain anymore, but only analyze the radioactive material contained in water.
The increasing radioactive density in sub-drain suggest the leakage of contaminated water is increasing in reactor1.
Tepco to start nitrogen gas injection into reactor2 for the first time, “Not knowing the hydrogen gas concentration”
Posted by Mochizuki on May 13th, 2013 · No Comments
Tepco is going to inject nitrogen gas into reactor2 as a test.
They need to keep the hydrogen gas concentration lower than 2% or it may cause hydrogen explosion.
Tepco has been injecting nitrogen gas into reactor1 to purge hydrogen gas but they couldn’t inject it into reactor2 so far.
The part to inject nitrogen gas is suppression chamber of reactor2. However, they don’t actually know the hydrogen gas concentration in suppression chamber of reactor2.
In order to obtain data, they will inject nitrogen gas at 5Nm3/h, for 6 hours a day from 5/14 to 5/17/2013.
The nitrogen gas will be injected in the day time. In case of hydrogen gas concentration going over 2% in Dry Well of PCV, entering reactor2 building will be restricted.
Fukushima fisheries associations turned down Tepco’s discharging ground water
Posted by Mochizuki on May 13th, 2013 · No Comments
On 4/26/2013, Fukushima Diary reported “Tepco is about to discharge pumped ground water to sea, “They won’t remove 21,000 Bq/m3 of Tritium” [URL]”
On 5/13/2013, Fukushima Prefectual Federation of Fishries Co-operative Associations decided not to approve the request of Tepco to discharge the ground water. The associations stated some of the members don’t distinguish ground water and contaminated retained water.
Tepco commented they will continue to convince the associations.
Great articles from Simply Info..... in respect to their detailed research , please go to the link for their full reports !
TEPCO Withholds “Black Box” Data About Fukushima Nuclear Disaster
[Translate] In April of 2010 TEPCO signed a contract with high tech security company Magna BSP to provide a sophisticated video and trespass detection system at the Fukushima Daiichi nuclear plant. This was the first installation of what was to be a series of similar installations at nuclear plants around Japan, coordinated between the government and nuclear operators. The system was installed at Fukushima Daiichi in 2010 Two TEPCO workers who were trained on the system weeks before the disaster were confirmed to have been among the Fukushima 50 who stayed at the plant during the worst of the disaster. To date TEPCO has not acknowledged the existence of the system or volunteered any of the video and data captured by the system to the public or the press. This data was never … Read entire article »
TEPCO To Remove Cover On Unit 1 This Fall
[Translate] TEPCO will remove the cover on unit 1 at Fukushima Daiichi this fall. The cover was hastily put over the unit in 2011 in an attempt to lower releases. TEPCO did not say why this work has suddenly been jumped ahead of other work. Most of the roadmap plans TEPCO has announced put unit 1 far down the list of priorities. To remove the spent fuel TEPCO will need to remove the cover, something they say will raise radiation levels. They will also need to remove the remains of the roof and the two cranes to do the work. It was not mentioned how much the radiation levels would rise during this work. Meanwhile the Japanese … Read entire article »
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