What happened at Fukushima? via Japan Focus

David McNeill & Jake Adelstein
It is one of the mysteries of Japan’s ongoing nuclear crisis: How much damage did the March 11 earthquake do to the Fukushima Daiichi reactors before the tsunami hit? The stakes are high: If the quake structurally compromised the plant and the safety of its nuclear fuel, then every other similar reactor in Japan will have to be reviewed and possibly shut down. With virtually all of Japan’s 54 reactors either offline (35) or scheduled for shutdown by next April, the issue of structural safety looms over the decision to restart every one in the months and years after.

The key question for operator Tokyo Electric Power Co (TEPCO) and its regulators to answer is this: How much damage was inflicted on the Daiichi plant before the first tsunami reached the plant roughly 40 minutes after the earthquake? TEPCO and the Japanese government are hardly reliable adjudicators in this controversy. “There has been no meltdown,” top government spokesman Edano Yukio famously repeated in the days after March 11. “It was an unforeseeable disaster,” Tepco’s then President Shimizu Masataka improbably said later. As we now know, meltdown was already occurring even as Edano spoke. And far from being unforeseeable, the disaster had been repeatedly forewarned.

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