i'm cathinkoyai. japanese government investigators have learned that senior officials in charge of fukushima daiichi were kept in thda omah thbo a key event at the nuclear plant. they were unaware the emergency cooling system for reactor one had been manually shut down following the rtua. the reactor was equipped with an emergency cooling mechanism in the event the external power source was lost. tokyo electric power company officials told investigators that one worker suspected water had dried up in reactor one's system. he couldn't see the steam that signaled things were functioning properly. so the worker manually shut down the system to prevent it from indage fukushima daiichi's chief masao yoshida wasn't informed. as a result, certain actions were tak othasmponhe system was working properly. yoshida reportedly said it was a major error he and other leaders did not immedielkn aut the manual shutdown of the cooling mechanism. tepco says the meltdown inside reactor one started five hours after the e