Even Tepco admitted melt-out is occurring.

Tepco has been stating that Fukushima plants are under control and they can achieve cold shutdown by the end of this year.

However, 11/30/2011, Tepco admitted that melt-out is happening at reactor 1 ,2 ,and 3.

In “their worst senario”, at reactor 1 , all the fuel has melted, it broke through the pressure vessel, dropped to the bottom of the container vessel. They assume the melted fuel is sinking to about 65cm depth of the concrete on the bottom of the container vessel.

Please note that there is only 37cm left to the body of the container vessel.

Also, they assume 57% of the fuel in reactor 2 and 63% of the fuel in reactor 3 have already melted out to the container vessel.

They still assert the situation is stable, but they don’t have any basis.

(Source)

1号機溶融燃料 65cm浸食
11月30日 19時6分
東京電力福島第一原子力発電所の事故で、メルトダウンが起きた1号機の燃料は、鋼鉄の原子炉の底を突き破って相当の量が格納容器に落下し、容器の底のコンクリートを溶かして最大で65センチ浸食していると推定されることが、東京電力の解析結果から分かりました。2号機と3号機についても一部の燃料は格納容器に落下していると推定しており、改めて事故の深刻さが浮き彫りになっています。

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