When was the Fukushima Daiichi plant declared stable after the 2011 accident?

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earthquake damage, Honshu, Japan, 2011 — Japan earthquake and tsunami of 2011 Aerial view of damage to a portion of the northeastern coast of Honshu, Japan, following the offshore earthquake and resultant tsunami there on March 11, 2011.

In December 2011, Japanese Prime Minister Noda Yoshihiko declared the Fukushima Daiichi facility stable after the cold shutdown of its reactors had been completed.12