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Fukushima: measures against tsunami -NHK

Sunday, May 1, 2011

Laaska News May 1,2011

Tokyo Electric Power Company will implement new measures at the crippled Fukushima Daiichi nuclear power plant to protect it from any other tsunami or aftershocks.

It will build temporary levees on the ocean side and fill part of the tunnels with concrete.

Q: This is the video image taken near the nuclear power plant on March 11th when the massive earthquake hit northeastern Japan.

Tsunami more than 20 meters high hit the cliff.

Q: Aftershocks occur frequently in the area of the Fukushima Daiichi power plant. There is concern that aftershocks and tsunami will hinder restoration of the cooling functions of the reactors.

Q: Officials of the power company held a news conference on Saturday.

TEPCO
“The company will build levees on the southeastern side of the plant to protect it from tsunami.”

Q: The temporary levees against tsunami will be built at these locations.

Q: They will be on the ocean side of Number 3 and Number 4 reactors.

Q: How are the levees going to be made?

Q: Steel baskets will be used.

Q: The baskets will be filled with rock.

Q: And the rock-filled baskets will be piled up.

Q: The levees will be 12 meters high. The work will begin within several days and is expected to be complete in mid-June.

Q: The second measure against tsunami is to reinforce the underground tunnels of the Number 2 and Number 3 reactors.

Water in the tunnels is contaminated with highly radioactive material.

Q: Work is needed to prevent the water from leaking into the sea at the time of a tsunami.

Q: TEPCO plans to fill in the pits leading down to the 4 tunnels on the ocean side of the reactors with concrete.

Q: This is the cross-sectional view.

Q: The work will be done by late May.

Q: Next is a measure against aftershocks.
A hydrogen explosion damaged the walls of the Number 4 reactor building, and weakened the quake resistance of the spent fuel storage pool.

TEPCO will set up steel pillars underneath the storage pool and reinforce it with concrete by the end of July.

Advisor to prime minister Goshi Hosono
“Aftershocks and tsunami will hinder the work to control the critical situation at the plant. Each measure will be verified for its validity against aftershocks and tsunami as it is put into place.”

NHK.