Tokyo Electric Power Company says they have reason to believe the cooling systems for Fukushima Daiichi were manually turned off.
They claim that the automatic systems kicked on after the 9.0 quake, but were then manually shut off right before the tsunami hit. It was three hours later before the system was turned back on. TEPCo did not provide evidence, and it sounded like speculation to me.
Basically they’re trying to say a shutdown of cooling systems for slightly longer than three hours caused a total meltdown of fuel rods in Reactor 1. They’re forgetting that there was no power to run the system anyway (according to their own statements weeks ago). Also, TEPCo has recently admitted that dozens of trucks with generators, brought in after the tsunami, failed to provide power to run the plant. It sounds like TEPCo is trying to blame its lower level throwaway employees for the meltdown.