information about Fukushima published in English in Japanese media info publiée en anglais dans la presse japonaise
1 Mai 2015
May 1, 2015
http://www3.nhk.or.jp/nhkworld/english/news/nuclear.html
May 1, 2015 - Updated 09:13 UTC+2
The operator of the disabled Fukushima Daiichi nuclear plant is investigating a suspected leak of highly radioactive water from a holding tank at the facility.
Tokyo Electric Power Company says inspectors found a pool of water at the base of the tank on Friday morning. The pool's surface measures about 20 by 20 centimeters square.
Company officials say workers placed sandbags around the water and there's no sign the pool is getting bigger. They say none of the water has seeped past barriers surrounding the tanks.
The officials say they measured a high 70-millisievert-per-hour rate of beta ray emission from the surface of the water.
Water that was pumped out of the reactor buildings is stored in many tanks at the plant. The water was treated to remove cesium but remains highly toxic. Officials believe the water in the pool came from one of the tanks.
The tank is an old type that has leaked before. Its steel plates are simply bolted together, not welded.
Tokyo Electric plans to remove the remaining water in the tank for treatment. And officials will try to find out how the leak occurred.
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