Mister Freeze
Tokyo needs to send up the Bat signal if Mr Freeze type tactics are seen as " Winning , duh ! "
http://ex-skf.blogspot.com/2013/05/fukushima-i-nuke-plant-freeze-soil-to.html
THURSDAY, MAY 30, 2013
#Fukushima I Nuke Plant: Freeze Soil to Block Groundwater
I can honestly say "I knew that", because that's what one of our long-time readers, netudiant, suggested some time ago.
From Yomiuri Shinbun (5/30/2013):
凍土の遮水壁で汚染水抑制…政府委が設置方針
Control contaminated water by impervious wall of frozen soil, the government committee is to request
東京電力福島第一原子力発電所で増え続ける汚染水の抜本的な抑制策として、政府の汚染水処理対策委員会（委員長・大西有三京都大名誉教授）は、建屋周辺の土壌を凍らせて地下水の流入を防ぐ「凍土の遮水壁」の設置を打ち出す方針を固めた。
As a drastic countermeasure against the contaminated water that continues to accumulate at Fukushima I Nuclear Power Plant, the government committee on contaminated water treatment countermeasures (chairman Yuzo Onishi, professor emeritus at Kyoto University) has decided to propose the installation of the "shield wall of frozen soil", whereby the soil around the reactor buildings will be frozen in order to stop the groundwater from leaking into the buildings.
３０日の会合で最終判断し、東電に実施を求める。
The final decision will be made in the meeting on May 30, and the government will tell TEPCO to implement the plan.
同原発の建屋には、地下水が１日平均４００トンずつ流れ込み、汚染水増加の最大の要因となっている。
400 tonnes of groundwater per day are leaking into the reactor buildings, and it is the biggest contributor to increasing contaminated water.
凍土の遮水壁は、大手ゼネコンが提案した。地中に管を並べて打ち込み、管内に氷点下数十度の冷却材を循環させ、周辺の土壌を一定の深さまで凍らせる。これが、建屋内と外側との水の動きを遮断する壁となる。地下に構造物があっても大きな障害とならず、１～２年程度で設置できる。
The impervious wall of frozen soil was proposed by a large general contractor. Rows of pipes will be driven into the ground, and coolant at dozens of degrees below zero Celsius will be circulated in the pipes to freeze the soil around the pipes to a certain depth. That will become the shield that will block the movement of groundwater. Even the underground structures won't be much of an impediment, and the wall could be set up in 1 to 2 years.
コンクリート製の遮水壁を造るのと違い、凍土法は管をすべて埋設した後、一気に土壌を凍らせ、短期間で壁が完成する。このため、施工中に壁の内側で地下水が減るなどして、建屋内から放射性物質を含む汚染水が外へ漏れ出る危険は少ない。
Unlike the impervious wall made of concrete, the wall of frozen soil will be built in a short period of time by burying all the pipes and freeze the soil all at once. Therefore, there will be little danger that the contaminated water leaks out from the reactor building, as could be the case if the level of groundwater inside the wall gets lower during the construction of the concrete wall.
That large general contractor is Kajima, who has also created the unmanned debris removal system for the Reactor 3 operating floor. Kajima is famous for huge civil engineering projects like tunnels, and this method of freezing the soil is very well known to them. The other major general contractors, Taisei and Shimizu also submitted their proposals, which involved concrete walls like TEPCO has been contemplating and included a study of overseas examples of such impervious walls.
Let's see what TEPCO says, because, as "Happy", unnamed former worker and journalist Ryuichi Kino said in the AP interview, cost-saving comes first for TEPCO. This frozen soil method looks faster and cheaper than the concrete wall or underground bypass.
From TEPCO's 4/26/2013 document on "How to prevent groundwater from coming into the reactor buildings" pages 36-47 , Kajima's excellent presentation (compared to the other two):
Plane view. Surround the reactor buildings and turbine buildings of Reactors 1-4 with frozen soil wall of about 1,400 meters in circumference.
Let's see what TEPCO says, because, as "Happy", unnamed former worker and journalist Ryuichi Kino said in the AP interview, cost-saving comes first for TEPCO. This frozen soil method looks faster and cheaper than the concrete wall or underground bypass.
From TEPCO's 4/26/2013 document on "How to prevent groundwater from coming into the reactor buildings" pages 36-47 , Kajima's excellent presentation (compared to the other two):
Plane view. Surround the reactor buildings and turbine buildings of Reactors 1-4 with frozen soil wall of about 1,400 meters in circumference.
Sectional view.
How to create frozen soil wall.
How continuous wall is possible with frozen soil wall.
According to Kajima (from the presentation),
- As long as the frozen soil remain frozen, the coefficient of permeability is zero (100% block of groundwater from flowing in).
- Even if power is lost, the wall remain frozen for several months up to a year.
- The wall self-repairs.
- Small footprint for installation equipment (2x2 meters, as opposed to 15x15 for normal wall construction), easy to remove.
- There is very little contaminated soil resulting from the construction of the wall.
- Construction of frozen soil wall won't interrupt decommission work
- By regularly replacing the coolant and pipes, the wall can be used for a very long time.
- Remote monitoring of temperature is possible.
- Continuous wall is possible.
Almost too good to be true!
Tepco to consider freezing ground for 1400m to stop ground water flowing into the plant
Posted by Mochizuki on May 30th, 2013 · No Comments
On 5/30/2013, the committee of experts suggested Tepco to stop ground water flowing into the plant by freezing the ground.
This is the technology to install freezing ducts underground to circulate the coolant material (eg, -40℃) inside so it freezes the soil around.
Currently 400 tones of ground water flow into the plant on the daily basis. Tepco is running out of the contaminated water storage.
It is to surround reactor1 ~4 by the underground wall of frozen soil for 1400m.
Tepco considered the feasibility of building the underground wall of frozen soil in 2011. However, in order not to let contaminated water overflow from the plant backward, they would need torecharge the ground water on purpose. Also, the lifetime of the wall is up to 2 years, when they need it to last over 10 years.
JP Gov to consider mandatory to record all the web browsing history
Posted by Mochizuki on May 29th, 2013 · 4 Comments
On 5/20/2013, the public security committee of LDP (the Liberal Democratic Party), which is the government party, announced to advise Japanese Prime Minister to make it mandatory to record web browsing history.
It is to investigate the cyber crime and track the suspect. They also suggested to found the organization for research, analysis, and manpower training including industry, government and academia.
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