Fukushima melted down only after the batteries supplying power to the primary cooling loop ran out. Normally diesel generators would have provided power but th

Fukushima melted down only after the batteries supplying power to the primary cooling loop ran out. Normally diesel generators would have provided power but they were located low enough that the tsunami took them out of commission. Had the backup diesels been located higher up -- as had been recommended to TEPCO -- then all would have been well at Fukushima Daiichi.