Tepco to begin coating sea floor with cement mixture Fukushima update 2012-02-21
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Title: Fukushima Daiichi Nuclear Power Plant Start of marine soil coating construction inside the port
Source: Tepco Handout
Date: Feb 21, 2012 According to past sampling, we detected relatively high concentrated radioactive materials from marine soil sampled at inside of the port. Since the marine soil will be spread by ocean wave, we plan to prevent spreading of marine pollution to outside of the port by covering marine soil with solidified soil. [...] ・We will use solidified soil made from bentonite and cement as covering material since it doesn't affect to coastal environment and has less variability of quality of construction. ・For lower layer, we will use light weight solidified soil (Coating material A) to cover high natant floating mud of seafloor surface ・For upper layer, we will use solidified soil (Coating material B) which has superior durability and easiness to fill
http://enenews.com/tepco-to-begin-coating-seafloor-with-cement-mixture
Seabed near nuke plant to be covered with cement
Tokyo Electric Power Company will begin cementing the seabed near the Fukushima Daiichi nuclear plant to prevent radioactive materials from spreading at sea.
On Wednesday, the utility plans to start pouring cement and clay over a 70,000-square meter area near the water intakes of the plant's 6 reactors. The seabed is about 6 meters deep.
The company says a 60-centimeter layer on the seabed will prevent the spread of contaminated mud and sand for about 50 years.
Extremely high levels of radioactive cesium have been detected in the area. The cesium mainly came from melted nuclear fuel rods from 3 of the reactors and contaminated water that leaked into the sea.
There is growing concern that ships will scatter the contaminated sand when work begins to retrieve the fuel rods in several years' time.
Tokyo Electric will start full-scale application of the cement in late February and hopes to complete the task in 4 months.
Wednesday, February 22, 2012 06:07 +0900 (JST)
http://www3.nhk.or.jp/daily/english/society.html
Radiation monitoring system launched at schools
Japan's government has begun monitoring radiation levels on a real-time basis at schools, parks and other sites frequently visited by children in disaster-hit Fukushima Prefecture.
The Education Ministry on Tuesday launched the system for showing data from 2,700 monitoring sites on its website.
The ministry introduced the system in response to residents' worries about radioactivity levels that have risen since the accident at the Fukushima Daiichi nuclear power plant last March.
Website users can choose a place on a map and check the latest radiation levels there. Choosing Fukushima City brings up a list of 368 monitoring sites and their radiation levels.
The system also offers average radiation levels in 10 minutes, and graphs showing changes in radiation at chosen sites.
Tuesday, February 21, 2012 19:09 +0900 (JST)
http://www3.nhk.or.jp/daily/english/20120221_35.html
Category:
Education
Tags:
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