information about Fukushima published in English in Japanese media info publiée en anglais dans la presse japonaise
30 Mai 2013
May 29, 2013
"Frozen wall" considered for nuclear plant water
http://www3.nhk.or.jp/nhkworld/english/news/20130530_02.html
The operator of the disabled Fukushima Daiichi nuclear power plant is still struggling to control the flow of groundwater into the reactor buildings 2 years after the accident.
A government panel is now proposing that a "frozen wall" be built around the buildings to prevent groundwater from seeping into the site.
The panel has been discussing measures against the groundwater since April when leaks were found in underground storage pools for contaminated water.
One measure being considered is to pump up the groundwater before it reaches the reactor site and release it into the ocean.
But the panel members say it would be difficult to contain 400 tons of groundwater per day. Fishermen also oppose the plan.
Another plan would be to bury coolant pipes and freeze the ground around the reactor buildings in order to make "frozen walls".
The panel members say the new plan comes with some technical difficulties. The operator would need to make sure that the groundwater level does not drop too much or else the contaminated water inside the site could seep out.
The panel will finalize the plan at a meeting on Thursday. It will call on the government and Tokyo Electric Power Company to urgently consider the plan.
May 29, 2013 - Updated 21:01 UTC
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