Workers of the Tokyo Electric Power Company (Tepco) failed to pinpoint the source of radioactive water leaking from the suppression chambers of the tsunami-crippled reactors at the Fukushima Daiichi nuclear power plant in Japan.
They entered the rooms housing the suppression chambers of the No.2 and 3 reactors on Wednesday for the first time since the nuclear accident in March, 2011.
Quoting Tepco officials, Japanese media reported on Friday that contaminated water had accumulated to a level of 5.43 meters in the two units. Water was up to more than half the height of the donut-shaped suppression chambers, each measuring about nine meters in diameter.
Photos released after the inspection show no signs of major damage to the facilities or equipment. Tepco plans to fill the reactors' containment vessels with water and extract the melted fuel as part of decommissioning efforts. For this, the damage done to the reactors' containment vessels and suppression chambers have to be located and repaired, the report said.
The Fukushima disaster was the largest nuclear accident since the Chernobyl disaster of 1986 forcing evacuation of residents in a 20 kilometer radius of the plant.
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