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I watched the news streams at 2am US Pacific time while that Tsunami hit.. the earthquake was well in advance of the power plant event, and yes they knew. Also

• sholladay 4y ago
  With the EEW having been around for a while at that point, it seems obvious that there should have been an automated system to begin a graceful shutdown of the reactor when a nearby quake was detected. I guess that may not have helped in this case, given that the EEW underestimated the quake. Although, hopefully such a system would have a sensitivity threshold that accounts for that. Edit: The reactors did shut down automatically at some point, although it’s not clear to me if it happened immediately as a result of the EEW or after damage was detected. At any rate, lack of electricity for cooling was the real problem.
  • ilyt 4y ago
    >With the EEW having been around for a while at that point, it seems obvious that there should have been an automated system to begin a graceful shutdown of the reactor when a nearby quake was detected. Uh, just no. First, it was most powerful registered earthquake in Japan which means that reactor survived every previous one just fine Second, it did shut down when it detected earthquake. The disaster didn't happen because it didn't start to shut down The failure was because emergency power supply needed to cool the reactor during shutdown also failed due to tsunami. Like, fuck, at least read wikipedia page before spewing bollocks